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style.lua
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-- ----------------------------------------------------------------------------
-- style.lua
--
-- Copyright (C) 2018-2025 Andy Townsend
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <https://www.gnu.org/licenses/>.
-- ----------------------------------------------------------------------------
-- Code common to several projects is in "shared_lua.lua".
-- That file is in this repository, but needs to be available on the standard
-- lua path when this script is invoked. The "update_render.sh" script does
-- this by:
-- cp /home/${local_filesystem_user}/src/SomeoneElse-style/shared_lua.lua -
-- /usr/local/share/lua/5.3/
-- ----------------------------------------------------------------------------
require "shared_lua"
polygon_keys = { 'area:aeroway', 'boundary', 'building', 'landcover', 'landuse', 'amenity', 'harbour', 'historic', 'leisure',
'man_made', 'military', 'natural', 'office', 'place', 'police', 'power',
'public_transport', 'seamark:type', 'shop', 'sport', 'tourism', 'waterway',
'wetland', 'water', 'aeroway' }
generic_keys = {'access','addr:housename','addr:housenumber','addr:interpolation','admin_level','advertising','aerialway',
'aeroway','amenity','animal','area','area:aeroway', 'area:highway','barrier',
'bicycle','brand','bridge','bridleway','booth','boundary','building', 'canoe', 'capital','construction','covered',
'culvert','cutting','denomination','departures_board','designation','disused','disused:highway','disused:man_made',
'disused:military','disused:railway','disused:shop','ele',
'embankment','emergency','entrance','foot','flood_prone','generation:source','geological','golf','government',
'harbour','hazard_prone','hazard_type','highway','historic','horse','hours','information','intermittent',
'junction','landcover','landuse','layer','leisure','lcn_ref','lock','locked',
'man_made','marker','military','motor_car','name','natural','ncn_milepost','office','oneway','operator',
'opening_hours:covid19','outlet','passenger_information_display','pipeline','pitch','place','playground',
'poi','population','police', 'power','power_source','public_transport',
'railway','railway:historic','ref','religion','rescue_equipment','route',
'school','seamark:type','seamark:rescue_station:category','service','shop','sport','surface',
'toll','tourism','tower:type', 'tracktype','training','tunnel','water','waterway',
'wetland', 'whitewater', 'width','wood','type', 'zoo' }
function add_z_order(keyvalues)
z_order = 0
if (keyvalues["layer"] ~= nil and tonumber(keyvalues["layer"])) then
z_order = 10*keyvalues["layer"]
end
zordering_tags = {{ 'railway', nil, 5, 1}, { 'boundary', 'administrative', 0, 1},
{ 'bridge', 'yes', 10, 0 }, { 'bridge', 'true', 10, 0 }, { 'bridge', 1, 10, 0 },
{ 'tunnel', 'yes', -10, 0}, { 'tunnel', 'true', -10, 0}, { 'tunnel', 1, -10, 0},
{ 'highway', 'road', 2, 0 },
{ 'highway', 'unclassified', 3, 0 }, { 'highway', 'unclassified_sidewalk', 3, 0 }, { 'highway', 'unclassified_verge', 3, 0 }, { 'highway', 'unclassified_ford', 3, 0 },
{ 'highway', 'living_street', 3, 0 }, { 'highway', 'living_street_sidewalk', 3, 0 }, { 'highway', 'living_street_verge', 3, 0 }, { 'highway', 'living_street_ford', 3, 0 },
{ 'highway', 'residential', 3, 0 },
{ 'highway', 'tertiary_link', 4, 0}, { 'highway', 'tertiary', 4, 0}, { 'highway', 'tertiary_sidewalk', 4, 0}, { 'highway', 'tertiary_verge', 4, 0},
{ 'highway', 'secondary_link', 6, 1}, { 'highway', 'secondary', 6, 1}, { 'highway', 'secondary_sidewalk', 6, 1}, { 'highway', 'secondary_verge', 6, 1},
{ 'highway', 'primary_link', 7, 1}, { 'highway', 'primary', 7, 1},{ 'highway', 'primary_sidewalk', 7, 1},{ 'highway', 'primary_verge', 7, 1},
{ 'highway', 'trunk_link', 8, 1}, { 'highway', 'trunk', 8, 1},
{ 'highway', 'motorway_link', 9, 1}, { 'highway', 'motorway', 9, 1},
{ 'highway', 'ldpnwn', 91, 1}, { 'highway', 'ldpncn', 91, 1}, { 'highway', 'ldpmtb', 91, 1}, { 'highway', 'ldpnhn', 91, 1},
}
for i,k in ipairs(zordering_tags) do
if ((k[2] and keyvalues[k[1]] == k[2]) or (k[2] == nil and keyvalues[k[1]] ~= nil)) then
if (k[4] == 1) then
roads = 1
end
z_order = z_order + k[3]
end
end
keyvalues["z_order"] = z_order
return keyvalues, roads
end
function filter_tags_generic(keyvalues, nokeys)
-- ----------------------------------------------------------------------------
-- local table for parameter passing
-- ----------------------------------------------------------------------------
local t = {}
filter = 0
tagcount = 0
if nokeys == 0 then
filter = 1
return filter, keyvalues
end
delete_tags = { 'FIXME', 'note', 'source' }
for i,k in ipairs(delete_tags) do
keyvalues[k] = nil
end
for k,v in pairs(keyvalues) do
for i, k2 in ipairs(generic_keys) do if k2 == k then tagcount = tagcount + 1; end end
end
if tagcount == 0 then
filter = 1
end
-- ----------------------------------------------------------------------------
-- Invalid layer values - change them to something plausible.
-- ----------------------------------------------------------------------------
fix_invalid_layer_values_t( keyvalues )
-- ----------------------------------------------------------------------------
-- Treat "was:" as "disused:"
-- ----------------------------------------------------------------------------
treat_was_as_disused_t( keyvalues )
-- ----------------------------------------------------------------------------
-- Designation processing
--
-- The "standard" stylesheet contains rules for different sorts of tracks
-- (tracktype), but doesn't contain rules for English/Welsh rights of way
-- designations.
--
-- The changes here do the following:
-- 1) Render any non-designated footway, bridleway, cycleway or track as "path"
-- (grey dashes in the "standard" style)
-- 2) Render anything designated as "public_footpath" as a "footway" (dotted
-- salmon)
-- 3) Render anything designated as "public_bridleway" as a "bridleway" (dotted
-- green).
-- 4) Render anything designated as "restricted_byway" as something a bit like
-- a bridleway, but with different dashes. Likewise "public_right_of_way".
-- 5) Render anything designated as "byway_open_to_all_traffic" as something
-- like a track (dashed brown)
-- 6) Render anything designated as "unclassified_county_road" or a
-- misspelling also like a track, but longer dashed brown.
--
-- These changes do mean that the the resulting database isn't any use for
-- anything other than rendering, but they do allow designations to be
-- displayed without any stylesheet changes.
-- ----------------------------------------------------------------------------
keyvalues["tracktype"] = nil
-- ----------------------------------------------------------------------------
-- Before processing footways, turn certain corridors into footways
--
-- Note that https://wiki.openstreetmap.org/wiki/Key:indoor defines
-- indoor=corridor as a closed way. highway=corridor is not documented there
-- but is used for corridors. We'll only process layer or level 0 (or nil)
-- ----------------------------------------------------------------------------
fix_corridors_t( keyvalues )
-- ----------------------------------------------------------------------------
-- If there are different names on each side of the street, we create one name
-- containing both.
-- If "name" does not exist but "name:en" does, use that.
-- ----------------------------------------------------------------------------
set_name_left_right_en_t( keyvalues )
-- ----------------------------------------------------------------------------
-- Move refs to consider as "official" to official_ref
-- ----------------------------------------------------------------------------
set_official_ref_t( keyvalues )
-- ----------------------------------------------------------------------------
-- Consolidate some rare highway types into ones we can display.
-- ----------------------------------------------------------------------------
process_golf_tracks_t( keyvalues )
-- ----------------------------------------------------------------------------
-- "Sabristas" sometimes add dubious names to motorway junctions. Don't show
-- them if they're not signed.
-- ----------------------------------------------------------------------------
suppress_unsigned_motorway_junctions_t( keyvalues )
-- ----------------------------------------------------------------------------
-- Move unsigned road refs to the name, in brackets.
-- ----------------------------------------------------------------------------
suppress_unsigned_road_refs_t( keyvalues )
-- ----------------------------------------------------------------------------
-- Consolidate more values for extraction / display
-- ----------------------------------------------------------------------------
consolidate_lua_01_t( keyvalues )
consolidate_lua_02_t( keyvalues )
-- ----------------------------------------------------------------------------
-- Use unclassified_sidewalk to indicate sidewalk
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "unclassified" ) or
( keyvalues["highway"] == "unclassified_link" ) or
( keyvalues["highway"] == "residential" ) or
( keyvalues["highway"] == "residential_link" )) then
if (( keyvalues["sidewalk"] == "both" ) or
( keyvalues["sidewalk"] == "left" ) or
( keyvalues["sidewalk"] == "mapped" ) or
( keyvalues["sidewalk"] == "separate" ) or
( keyvalues["sidewalk"] == "right" ) or
( keyvalues["sidewalk"] == "shared" ) or
( keyvalues["sidewalk"] == "yes" ) or
( keyvalues["sidewalk:left"] == "separate" ) or
( keyvalues["sidewalk:left"] == "yes" ) or
( keyvalues["sidewalk:left"] == "segregated" ) or
( keyvalues["sidewalk:right"] == "separate" ) or
( keyvalues["sidewalk:right"] == "yes" ) or
( keyvalues["sidewalk:both"] == "separate" ) or
( keyvalues["sidewalk:both"] == "yes" ) or
( keyvalues["footway"] == "separate" ) or
( keyvalues["footway"] == "yes" ) or
( keyvalues["shoulder"] == "both" ) or
( keyvalues["shoulder"] == "left" ) or
( keyvalues["shoulder"] == "right" ) or
( keyvalues["shoulder"] == "yes" ) or
( keyvalues["hard_shoulder"] == "yes" ) or
( keyvalues["cycleway"] == "track" ) or
( keyvalues["cycleway"] == "opposite_track" ) or
( keyvalues["cycleway"] == "yes" ) or
( keyvalues["cycleway"] == "separate" ) or
( keyvalues["cycleway"] == "sidewalk" ) or
( keyvalues["cycleway"] == "sidepath" ) or
( keyvalues["cycleway"] == "segregated" ) or
( keyvalues["segregated"] == "yes" ) or
( keyvalues["segregated"] == "right" )) then
keyvalues["highway"] = "unclassified_sidewalk"
end
end
-- ----------------------------------------------------------------------------
-- Use unclassified_verge to indicate verge
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "unclassified" ) or
( keyvalues["highway"] == "unclassified_link" ) or
( keyvalues["highway"] == "residential" ) or
( keyvalues["highway"] == "residential_link" )) then
if (( keyvalues["verge"] == "both" ) or
( keyvalues["verge"] == "left" ) or
( keyvalues["verge"] == "separate" ) or
( keyvalues["verge"] == "right" ) or
( keyvalues["verge"] == "yes" ) or
( keyvalues["verge:both"] == "separate" ) or
( keyvalues["verge:both"] == "yes" ) or
( keyvalues["verge:left"] == "separate" ) or
( keyvalues["verge:left"] == "yes" ) or
( keyvalues["verge:right"] == "separate" ) or
( keyvalues["verge:right"] == "yes" )) then
keyvalues["highway"] = "unclassified_verge"
end
end
-- ----------------------------------------------------------------------------
-- Use unclassified_ford to indicate ford
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "unclassified" ) or
( keyvalues["highway"] == "unclassified_link" ) or
( keyvalues["highway"] == "residential" ) or
( keyvalues["highway"] == "residential_link" )) then
if ( keyvalues["ford"] == "yes" ) then
keyvalues["highway"] = "unclassified_ford"
end
end
-- ----------------------------------------------------------------------------
-- Use living_street_sidewalk to indicate sidewalk
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "living_street" ) or
( keyvalues["highway"] == "living_street_link" )) then
if (( keyvalues["sidewalk"] == "both" ) or
( keyvalues["sidewalk"] == "left" ) or
( keyvalues["sidewalk"] == "mapped" ) or
( keyvalues["sidewalk"] == "separate" ) or
( keyvalues["sidewalk"] == "right" ) or
( keyvalues["sidewalk"] == "shared" ) or
( keyvalues["sidewalk"] == "yes" ) or
( keyvalues["sidewalk:left"] == "separate" ) or
( keyvalues["sidewalk:left"] == "yes" ) or
( keyvalues["sidewalk:left"] == "segregated" ) or
( keyvalues["sidewalk:right"] == "separate" ) or
( keyvalues["sidewalk:right"] == "yes" ) or
( keyvalues["sidewalk:both"] == "separate" ) or
( keyvalues["sidewalk:both"] == "yes" ) or
( keyvalues["footway"] == "separate" ) or
( keyvalues["footway"] == "yes" ) or
( keyvalues["shoulder"] == "both" ) or
( keyvalues["shoulder"] == "left" ) or
( keyvalues["shoulder"] == "right" ) or
( keyvalues["shoulder"] == "yes" ) or
( keyvalues["hard_shoulder"] == "yes" ) or
( keyvalues["cycleway"] == "track" ) or
( keyvalues["cycleway"] == "opposite_track" ) or
( keyvalues["cycleway"] == "yes" ) or
( keyvalues["cycleway"] == "separate" ) or
( keyvalues["cycleway"] == "sidewalk" ) or
( keyvalues["cycleway"] == "sidepath" ) or
( keyvalues["cycleway"] == "segregated" ) or
( keyvalues["segregated"] == "yes" ) or
( keyvalues["segregated"] == "right" )) then
keyvalues["highway"] = "living_street_sidewalk"
end
end
-- ----------------------------------------------------------------------------
-- Use living_street_verge to indicate verge
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "living_street" ) or
( keyvalues["highway"] == "living_street_link" )) then
if (( keyvalues["verge"] == "both" ) or
( keyvalues["verge"] == "left" ) or
( keyvalues["verge"] == "separate" ) or
( keyvalues["verge"] == "right" ) or
( keyvalues["verge"] == "yes" ) or
( keyvalues["verge:both"] == "separate" ) or
( keyvalues["verge:both"] == "yes" ) or
( keyvalues["verge:left"] == "separate" ) or
( keyvalues["verge:left"] == "yes" ) or
( keyvalues["verge:right"] == "separate" ) or
( keyvalues["verge:right"] == "yes" )) then
keyvalues["highway"] = "living_street_verge"
end
end
-- ----------------------------------------------------------------------------
-- Use living_street_ford to indicate ford
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "living_street" ) or
( keyvalues["highway"] == "living_street_link" )) then
if ( keyvalues["ford"] == "yes" ) then
keyvalues["highway"] = "living_street_ford"
end
end
-- ----------------------------------------------------------------------------
-- Use service_ford to indicate ford
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "service" ) or
( keyvalues["highway"] == "service_link" )) then
if ( keyvalues["ford"] == "yes" ) then
keyvalues["highway"] = "service_ford"
end
end
-- ----------------------------------------------------------------------------
-- Use tertiary_sidewalk to indicate sidewalk
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "tertiary" ) or
( keyvalues["highway"] == "tertiary_link" )) then
if (( keyvalues["sidewalk"] == "both" ) or
( keyvalues["sidewalk"] == "left" ) or
( keyvalues["sidewalk"] == "mapped" ) or
( keyvalues["sidewalk"] == "separate" ) or
( keyvalues["sidewalk"] == "right" ) or
( keyvalues["sidewalk"] == "shared" ) or
( keyvalues["sidewalk"] == "yes" ) or
( keyvalues["sidewalk:left"] == "separate" ) or
( keyvalues["sidewalk:left"] == "yes" ) or
( keyvalues["sidewalk:left"] == "segregated" ) or
( keyvalues["sidewalk:right"] == "separate" ) or
( keyvalues["sidewalk:right"] == "yes" ) or
( keyvalues["sidewalk:both"] == "separate" ) or
( keyvalues["sidewalk:both"] == "yes" ) or
( keyvalues["footway"] == "separate" ) or
( keyvalues["footway"] == "yes" ) or
( keyvalues["shoulder"] == "both" ) or
( keyvalues["shoulder"] == "left" ) or
( keyvalues["shoulder"] == "right" ) or
( keyvalues["shoulder"] == "yes" ) or
( keyvalues["cycleway"] == "track" ) or
( keyvalues["cycleway"] == "opposite_track" ) or
( keyvalues["cycleway"] == "yes" ) or
( keyvalues["cycleway"] == "separate" ) or
( keyvalues["cycleway"] == "sidewalk" ) or
( keyvalues["cycleway"] == "sidepath" ) or
( keyvalues["cycleway"] == "segregated" ) or
( keyvalues["segregated"] == "yes" ) or
( keyvalues["segregated"] == "right" )) then
keyvalues["highway"] = "tertiary_sidewalk"
end
end
-- ----------------------------------------------------------------------------
-- Use tertiary_verge to indicate verge
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "tertiary" ) or
( keyvalues["highway"] == "tertiary_link" )) then
if (( keyvalues["verge"] == "both" ) or
( keyvalues["verge"] == "left" ) or
( keyvalues["verge"] == "separate" ) or
( keyvalues["verge"] == "right" ) or
( keyvalues["verge"] == "yes" ) or
( keyvalues["verge:both"] == "separate" ) or
( keyvalues["verge:both"] == "yes" ) or
( keyvalues["verge:left"] == "separate" ) or
( keyvalues["verge:left"] == "yes" ) or
( keyvalues["verge:right"] == "separate" ) or
( keyvalues["verge:right"] == "yes" )) then
keyvalues["highway"] = "tertiary_verge"
end
end
-- ----------------------------------------------------------------------------
-- Use tertiary_ford to indicate ford
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "tertiary" ) or
( keyvalues["highway"] == "tertiary_link" )) then
if ( keyvalues["ford"] == "yes" ) then
keyvalues["highway"] = "tertiary_ford"
end
end
-- ----------------------------------------------------------------------------
-- Use secondary_sidewalk to indicate sidewalk
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "secondary" ) or
( keyvalues["highway"] == "secondary_link" )) then
if (( keyvalues["sidewalk"] == "both" ) or
( keyvalues["sidewalk"] == "left" ) or
( keyvalues["sidewalk"] == "mapped" ) or
( keyvalues["sidewalk"] == "separate" ) or
( keyvalues["sidewalk"] == "right" ) or
( keyvalues["sidewalk"] == "shared" ) or
( keyvalues["sidewalk"] == "yes" ) or
( keyvalues["sidewalk:left"] == "separate" ) or
( keyvalues["sidewalk:left"] == "yes" ) or
( keyvalues["sidewalk:left"] == "segregated" ) or
( keyvalues["sidewalk:right"] == "separate" ) or
( keyvalues["sidewalk:right"] == "yes" ) or
( keyvalues["sidewalk:both"] == "separate" ) or
( keyvalues["sidewalk:both"] == "yes" ) or
( keyvalues["footway"] == "separate" ) or
( keyvalues["footway"] == "yes" ) or
( keyvalues["shoulder"] == "both" ) or
( keyvalues["shoulder"] == "left" ) or
( keyvalues["shoulder"] == "right" ) or
( keyvalues["shoulder"] == "yes" ) or
( keyvalues["cycleway"] == "track" ) or
( keyvalues["cycleway"] == "opposite_track" ) or
( keyvalues["cycleway"] == "yes" ) or
( keyvalues["cycleway"] == "separate" ) or
( keyvalues["cycleway"] == "sidewalk" ) or
( keyvalues["cycleway"] == "sidepath" ) or
( keyvalues["cycleway"] == "segregated" ) or
( keyvalues["segregated"] == "yes" ) or
( keyvalues["segregated"] == "right" )) then
keyvalues["highway"] = "secondary_sidewalk"
end
end
-- ----------------------------------------------------------------------------
-- Use secondary_verge to indicate verge
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "secondary" ) or
( keyvalues["highway"] == "secondary_link" )) then
if (( keyvalues["verge"] == "both" ) or
( keyvalues["verge"] == "left" ) or
( keyvalues["verge"] == "separate" ) or
( keyvalues["verge"] == "right" ) or
( keyvalues["verge"] == "yes" ) or
( keyvalues["verge:both"] == "separate" ) or
( keyvalues["verge:both"] == "yes" ) or
( keyvalues["verge:left"] == "separate" ) or
( keyvalues["verge:left"] == "yes" ) or
( keyvalues["verge:right"] == "separate" ) or
( keyvalues["verge:right"] == "yes" )) then
keyvalues["highway"] = "secondary_verge"
end
end
-- ----------------------------------------------------------------------------
-- Use primary_sidewalk to indicate sidewalk
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "primary" ) or
( keyvalues["highway"] == "primary_link" )) then
if (( keyvalues["sidewalk"] == "both" ) or
( keyvalues["sidewalk"] == "left" ) or
( keyvalues["sidewalk"] == "mapped" ) or
( keyvalues["sidewalk"] == "separate" ) or
( keyvalues["sidewalk"] == "right" ) or
( keyvalues["sidewalk"] == "shared" ) or
( keyvalues["sidewalk"] == "yes" ) or
( keyvalues["sidewalk:left"] == "separate" ) or
( keyvalues["sidewalk:left"] == "yes" ) or
( keyvalues["sidewalk:left"] == "segregated" ) or
( keyvalues["sidewalk:right"] == "separate" ) or
( keyvalues["sidewalk:right"] == "yes" ) or
( keyvalues["sidewalk:both"] == "separate" ) or
( keyvalues["sidewalk:both"] == "yes" ) or
( keyvalues["footway"] == "separate" ) or
( keyvalues["footway"] == "yes" ) or
( keyvalues["shoulder"] == "both" ) or
( keyvalues["shoulder"] == "left" ) or
( keyvalues["shoulder"] == "right" ) or
( keyvalues["shoulder"] == "yes" ) or
( keyvalues["cycleway"] == "track" ) or
( keyvalues["cycleway"] == "opposite_track" ) or
( keyvalues["cycleway"] == "yes" ) or
( keyvalues["cycleway"] == "separate" ) or
( keyvalues["cycleway"] == "sidewalk" ) or
( keyvalues["cycleway"] == "sidepath" ) or
( keyvalues["cycleway"] == "segregated" ) or
( keyvalues["segregated"] == "yes" ) or
( keyvalues["segregated"] == "right" )) then
keyvalues["highway"] = "primary_sidewalk"
end
end
-- ----------------------------------------------------------------------------
-- Use primary_verge to indicate verge
-- ----------------------------------------------------------------------------
if (( keyvalues["highway"] == "primary" ) or
( keyvalues["highway"] == "primary_link" )) then
if (( keyvalues["verge"] == "both" ) or
( keyvalues["verge"] == "left" ) or
( keyvalues["verge"] == "separate" ) or
( keyvalues["verge"] == "right" ) or
( keyvalues["verge"] == "yes" ) or
( keyvalues["verge:both"] == "separate" ) or
( keyvalues["verge:both"] == "yes" ) or
( keyvalues["verge:left"] == "separate" ) or
( keyvalues["verge:left"] == "yes" ) or
( keyvalues["verge:right"] == "separate" ) or
( keyvalues["verge:right"] == "yes" )) then
keyvalues["highway"] = "primary_verge"
end
end
-- ----------------------------------------------------------------------------
-- Consolidate more values for extraction / display
-- ----------------------------------------------------------------------------
consolidate_lua_03_t( keyvalues )
-- ----------------------------------------------------------------------------
-- We set 'access = "no"' here on all parking spaces and highway emergency
-- bays, for raster rendering purposes.
-- It's not done in the shared code in case other consumers of the schema want
-- to do something else.
-- ----------------------------------------------------------------------------
if (( keyvalues["parking_space"] ~= nil ) and
( keyvalues["parking_space"] ~= "" )) then
keyvalues["access"] = "no"
end
-- ----------------------------------------------------------------------------
-- Remove admin boundaries from the map
-- I do this because I'm simply not interested in admin boundaries and I'm
-- lucky enough to live in a place where I don't have to be.
-- ----------------------------------------------------------------------------
if (keyvalues["boundary"] == "administrative") then
keyvalues["boundary"] = nil
end
-- ----------------------------------------------------------------------------
-- Slipways - render ways as miniature railway in addition to slipway icon
-- ----------------------------------------------------------------------------
if ( keyvalues["leisure"] == "slipway" ) then
keyvalues["railway"] = "miniature"
end
-- ----------------------------------------------------------------------------
-- Sluice gates - various alternative keys for these four may have been
-- consolidated in the shared lua. Here we send through as man_made, and also
-- display as building=roof.
-- Also waterfall (the dot or line is generic enough to work there too).
-- The change of waterway to weir ensures line features appear too.
-- ----------------------------------------------------------------------------
if (( keyvalues["waterway"] == "sluice_gate" ) or
( keyvalues["waterway"] == "waterfall" ) or
( keyvalues["waterway"] == "weir" ) or
( keyvalues["waterway"] == "floating_barrier" )) then
keyvalues["man_made"] = "sluice_gate"
keyvalues["building"] = "roof"
keyvalues["waterway"] = "weir"
end
-- ----------------------------------------------------------------------------
-- Consolidate more values for extraction / display
-- ----------------------------------------------------------------------------
consolidate_lua_04_t( keyvalues )
-- ----------------------------------------------------------------------------
-- End of AJT generic additions.
-- ----------------------------------------------------------------------------
return filter, keyvalues
end
function filter_tags_node (keyvalues, nokeys)
-- ----------------------------------------------------------------------------
-- AJT node-only additions.
--
-- Consolidate some "ford" values into "yes".
-- This is here rather than in "generic" because "generic" is called after this
-- There is a similar section in way-only.
-- ----------------------------------------------------------------------------
if (( keyvalues["ford"] == "tidal_causeway" ) or
( keyvalues["ford"] == "ford" ) or
( keyvalues["ford"] == "intermittent" ) or
( keyvalues["ford"] == "seasonal" ) or
( keyvalues["ford"] == "stream" ) or
( keyvalues["ford"] == "tidal" )) then
keyvalues["ford"] = "yes"
end
if ( keyvalues["ford"] == "yes" ) then
keyvalues["highway"] = "ford"
keyvalues["ford"] = nil
end
if ( keyvalues["ford"] == "stepping_stones" ) then
keyvalues["barrier"] = "stepping_stones"
keyvalues["ford"] = nil
end
-- ----------------------------------------------------------------------------
-- Map non-linear unknown (and some known) barriers to bollard
-- ----------------------------------------------------------------------------
if (( keyvalues["barrier"] == "yes" ) or
( keyvalues["barrier"] == "barrier" ) or
( keyvalues["barrier"] == "tank_trap" ) or
( keyvalues["barrier"] == "dragons_teeth" ) or
( keyvalues["barrier"] == "bollards" ) or
( keyvalues["barrier"] == "bus_trap" ) or
( keyvalues["barrier"] == "car_trap" ) or
( keyvalues["barrier"] == "rising_bollard" ) or
( keyvalues["barrier"] == "steps" ) or
( keyvalues["barrier"] == "step" ) or
( keyvalues["barrier"] == "post" ) or
( keyvalues["man_made"] == "post" ) or
( keyvalues["man_made"] == "marker_post" ) or
( keyvalues["man_made"] == "boundary_post" ) or
( keyvalues["man_made"] == "concrete_post" ) or
( keyvalues["barrier"] == "stone" ) or
( keyvalues["barrier"] == "hoarding" ) or
( keyvalues["barrier"] == "sump_buster" ) or
( keyvalues["barrier"] == "gate_pier" ) or
( keyvalues["barrier"] == "gate_post" ) or
( keyvalues["man_made"] == "gate_post" ) or
( keyvalues["man_made"] == "gatepost" ) or
( keyvalues["barrier"] == "pole" )) then
keyvalues["barrier"] = "bollard"
end
-- ----------------------------------------------------------------------------
-- Render barrier=chain on nodes as horse_stile. At least sone of the time
-- it's correct.
-- ----------------------------------------------------------------------------
if ( keyvalues["barrier"] == "chain" ) then
keyvalues["barrier"] = "horse_stile"
end
-- ----------------------------------------------------------------------------
-- Render barrier=v_stile on nodes as stile.
-- ----------------------------------------------------------------------------
if ( keyvalues["barrier"] == "v_stile" ) then
keyvalues["barrier"] = "stile"
end
-- ----------------------------------------------------------------------------
-- highway=turning_loop on nodes to turning_circle
-- "turning_loop" is mostly used on nodes, with one way in UK/IE data.
-- ----------------------------------------------------------------------------
if ( keyvalues["highway"] == "turning_loop" ) then
keyvalues["highway"] = "turning_circle"
end
-- ----------------------------------------------------------------------------
-- Change natural=bare_rock and natural=rocks on nodes to natural=rock
-- So that an icon (the all-black, non-climbing boulder one) is displayed
-- ----------------------------------------------------------------------------
if (( keyvalues["natural"] == "bare_rock" ) or
( keyvalues["natural"] == "rocks" ) or
( keyvalues["natural"] == "stones" )) then
keyvalues["natural"] = "rock"
end
-- ----------------------------------------------------------------------------
-- If lcn_ref exists (for example as a location in a local cycling network),
-- render it via a "man_made" tag if there's no other tags on that node.
-- ----------------------------------------------------------------------------
if (( keyvalues["lcn_ref"] ~= nil ) and
( keyvalues["ref"] == nil )) then
keyvalues["man_made"] = "lcn_ref"
keyvalues["ref"] = keyvalues["lcn_ref"]
keyvalues["lcn_ref"] = nil
end
-- ----------------------------------------------------------------------------
-- End of AJT node-only additions.
-- ----------------------------------------------------------------------------
return filter_tags_generic(keyvalues, nokeys)
end
function filter_basic_tags_rel (keyvalues, nokeys)
-- ----------------------------------------------------------------------------
-- AJT relation-only additions.
-- ----------------------------------------------------------------------------
-- ----------------------------------------------------------------------------
-- End of AJT relation-only additions.
-- ----------------------------------------------------------------------------
filter, keyvalues = filter_tags_generic(keyvalues, nokeys)
if filter == 1 then
return filter, keyvalues
end
if ((keyvalues["type"] ~= "route") and (keyvalues["type"] ~= "multipolygon") and (keyvalues["type"] ~= "boundary")) then
filter = 1
return filter, keyvalues
end
return filter, keyvalues
end
function filter_tags_way (keyvalues, nokeys)
filter = 0
poly = 0
tagcount = 0
roads = 0
-- ----------------------------------------------------------------------------
-- AJT way-only additions.
--
-- Consolidate some "ford" values into "yes".
-- This is here rather than in "generic" because "generic" is called after this
-- There is a similar section in way-only.
-- ----------------------------------------------------------------------------
if (( keyvalues["ford"] == "tidal_causeway" ) or
( keyvalues["ford"] == "ford" ) or
( keyvalues["ford"] == "intermittent" ) or
( keyvalues["ford"] == "seasonal" ) or
( keyvalues["ford"] == "stream" ) or
( keyvalues["ford"] == "tidal" )) then
keyvalues["ford"] = "yes"
end
-- ----------------------------------------------------------------------------
-- If a highway has tidal=yes but not yet a ford or bridge tag, add ford=yes
-- ----------------------------------------------------------------------------
if (( keyvalues["tidal"] == "yes" ) and
( keyvalues["highway"] ~= nil ) and
( keyvalues["ford"] == nil ) and
( keyvalues["bridge"] == nil )) then
keyvalues["ford"] = "yes"
end
-- ----------------------------------------------------------------------------
-- "barrier=gate" on a way is a dark line; on bridleways it looks
-- "sufficiently different" to mark fords out.
-- ----------------------------------------------------------------------------
if (( keyvalues["ford"] == "yes" ) or
( keyvalues["ford"] == "stepping_stones" ))then
keyvalues["barrier"] = "ford"
end
-- ----------------------------------------------------------------------------
-- Treat a linear "door" and some other linear barriers as "gate"
--
-- A "lock_gate" mapped as a node gets its own "locks" layer in
-- water-features.mss (for historical reasons that no longer make sense).
-- There's no explicit node or generic code for lock_gate.
-- ----------------------------------------------------------------------------
if (( keyvalues["barrier"] == "door" ) or
( keyvalues["barrier"] == "swing_gate" ) or
( keyvalues["waterway"] == "lock_gate" )) then
keyvalues["barrier"] = "gate"
keyvalues["waterway"] = nil
end
-- ----------------------------------------------------------------------------
-- Map linear tank traps, and some others, to wall
-- ----------------------------------------------------------------------------
if (( keyvalues["barrier"] == "tank_trap" ) or
( keyvalues["barrier"] == "dragons_teeth" ) or
( keyvalues["barrier"] == "obstruction" ) or
( keyvalues["barrier"] == "sea_wall" ) or
( keyvalues["barrier"] == "flood_wall" ) or
( keyvalues["barrier"] == "block" ) or
( keyvalues["barrier"] == "haha" ) or
( keyvalues["barrier"] == "jersey_barrier" ) or
( keyvalues["barrier"] == "retaining_wall" )) then
keyvalues["barrier"] = "wall"
end
-- ----------------------------------------------------------------------------
-- Map linear unknown and other barriers to fence.
-- In some cases this is a bit of a stretch - you can walk up some steps, or
-- through a cycle barrier for example. Fence was chosen as the "current
-- minimal thickness linear barrier". If a narrower one is introduced it
-- would make sense to make traversable ones in this list to that.
-- ----------------------------------------------------------------------------
if (( keyvalues["barrier"] == "yes" ) or
( keyvalues["barrier"] == "barrier" ) or
( keyvalues["barrier"] == "bollard" ) or
( keyvalues["barrier"] == "steps" ) or
( keyvalues["barrier"] == "step" ) or
( keyvalues["barrier"] == "hoarding" ) or
( keyvalues["barrier"] == "hand_rail_fence" ) or
( keyvalues["barrier"] == "horse_stile" ) or
( keyvalues["barrier"] == "chain" ) or
( keyvalues["barrier"] == "stile" ) or
( keyvalues["barrier"] == "v_stile" ) or
( keyvalues["barrier"] == "cycle_barrier" )) then
keyvalues["barrier"] = "fence"
end
if (( keyvalues["public_transport"] == "platform" ) and
( keyvalues["highway"] ~= "platform" ) and
( keyvalues["highway"] ~= "bus_stop" ) and
( keyvalues["railway"] ~= "platform" )) then
keyvalues["highway"] = "platform"
end
-- ----------------------------------------------------------------------------
-- Map sinkholes mapped as ways to a non-area cliff.
-- It's pot luck whether the triangles will appear on the right side of the
-- cliff, but by chance most of the few UK ones do seem to be drawn the
-- "correct" way around.
-- ----------------------------------------------------------------------------
if ( keyvalues["natural"] == "sinkhole" ) then
keyvalues["natural"] = "cliff"
keyvalues["area"] = "no"
end
-- ----------------------------------------------------------------------------
-- Add building=roof on shelter and bicycle_parking ways if no building tag
-- already.
-- ----------------------------------------------------------------------------
if ((( keyvalues["amenity"] == "shelter" ) or
( keyvalues["amenity"] == "bicycle_parking" )) and
( keyvalues["building"] == nil ) and
( keyvalues["covered"] ~= "no" )) then
keyvalues["building"] = "roof"
end
-- ----------------------------------------------------------------------------
-- A "leisure=track" can be either a linear or an area feature
-- https://wiki.openstreetmap.org/wiki/Tag%3Aleisure%3Dtrack
-- Assign a highway tag (gallop or leisuretrack) so that linear features can
-- be explicitly rendered.
-- "sport" is often (but not always) used to separate different types of
-- leisure tracks.
--
-- If on an area, the way will go into planet_osm_polygon and the highway
-- feature won't be rendered (because both leisuretrack and gallop are only
-- processed as linear features) but the leisure=track will be (as an area).
--
-- Additionally force anything that is "oneway" to not be an area feature
-- ----------------------------------------------------------------------------
if ( keyvalues["leisure"] == "track" ) then
if (( keyvalues["sport"] == "equestrian" ) or
( keyvalues["sport"] == "horse_racing" )) then
keyvalues["highway"] = "gallop"
else
if ((( keyvalues["sport"] == "motor" ) or
( keyvalues["sport"] == "karting" ) or
( keyvalues["sport"] == "motor;karting" )) and
(( keyvalues["area"] == nil ) or
( keyvalues["area"] == "no" ))) then
keyvalues["highway"] = "raceway"
else
keyvalues["highway"] = "leisuretrack"
end
end
if ( keyvalues["oneway"] == "yes" ) then
keyvalues["area"] = "no"
end
end
-- ----------------------------------------------------------------------------
-- With vector processing we need to explicitly decide whether a feature should
-- be treated as an area or not. With raster we generally speaking don't -
-- "aeroway" is defined above as a polygon key so osm2pgsql will treat one as
-- an area if it it is closed, and not otherwise.
--
-- If something is a runway and is a closed way we can assume that what has
-- been mapped is the outline of the area of the linear runway (because
-- although "circular runways" are a concept -
-- https://en.wikipedia.org/wiki/Endless_runway - they are not not a thing
-- right now. However, closed circular taxiways are very much a thing, and
-- so we must check the "area" tag there. Unless area=yes is explicitly set,
-- we assume that a taxiway is linear.
-- ----------------------------------------------------------------------------
if (( keyvalues["aeroway"] == "taxiway" ) and
( keyvalues["area"] ~= "yes" )) then
keyvalues["area"] = "no"
end
-- ----------------------------------------------------------------------------
-- highway=turning_loop on ways to service road
-- "turning_loop" is mostly used on nodes, with one way in UK/IE data.
-- ----------------------------------------------------------------------------
if ( keyvalues["highway"] == "turning_loop" ) then
keyvalues["highway"] = "service"
keyvalues["service"] = "driveway"
end
-- ----------------------------------------------------------------------------
-- natural=rock on ways to natural=bare_rock
-- ----------------------------------------------------------------------------
if ( keyvalues["natural"] == "rock" ) then
keyvalues["natural"] = "bare_rock"
end
-- ----------------------------------------------------------------------------
-- Where amenity=watering_place has been used on a way and there's no
-- "natural" tag already, apply "natural=water".
-- ----------------------------------------------------------------------------
if (( keyvalues["amenity"] == "watering_place" ) and
( keyvalues["natural"] == nil )) then
keyvalues["amenity"] = nil
keyvalues["natural"] = "water"
end
-- ----------------------------------------------------------------------------
-- End of AJT way-only additions.
-- ----------------------------------------------------------------------------
filter, keyvalues = filter_tags_generic(keyvalues, nokeys)
if filter == 1 then
return filter, keyvalues, poly, roads
end
for i,k in ipairs(polygon_keys) do
if keyvalues[k] then
poly=1
break
end
end
if ((keyvalues["area"] == "yes") or (keyvalues["area"] == "1") or (keyvalues["area"] == "true")) then
poly = 1;
elseif ((keyvalues["area"] == "no") or (keyvalues["area"] == "0") or (keyvalues["area"] == "false")) then
poly = 0;
end
keyvalues, roads = add_z_order(keyvalues)
return filter, keyvalues, poly, roads
end
function filter_tags_relation_member (keyvalues, keyvaluemembers, roles, membercount)
filter = 0
boundary = 0
polygon = 0
roads = 0
membersuperseeded = {}
for i = 1, membercount do
membersuperseeded[i] = 0
end
-- ----------------------------------------------------------------------------
-- AJT relation-only additions.
-- ----------------------------------------------------------------------------
if (( keyvalues["type"] == "multipolygon" ) and
( keyvalues["junction"] == "yes" )) then
keyvalues["type"] = nil
end
type = keyvalues["type"]
keyvalues["type"] = nil
-- ----------------------------------------------------------------------------
-- Note that we're not doing any per-member processing for routes - we just
-- add a highway type to the relation and ensure that the style rules for it
-- handle it sensibly, as it's going to be overlaid over other highway types.
-- "ldpnwn" is used to allow for future different processing of different
-- relations.
--
-- Name handling for cycle routes makes a special case of the National Byway.
--
-- MTB routes are processed only if they are not also another type of cycle
-- route (including LCN, which isn't actually shown in this rendering).
--
-- Processing routes,
-- Walking networks first.
-- We use "ref" rather than "name" on IWNs but not others.
-- We use "colour" as "name" if "colour" is set and "name" is not.
-- ----------------------------------------------------------------------------
if (type == "route") then
if (( keyvalues["network"] == "iwn" ) and
( keyvalues["ref"] ~= nil )) then
keyvalues["name"] = keyvalues["ref"]
end
if ((( keyvalues["network"] == "iwn" ) or
( keyvalues["network"] == "nwn" ) or
( keyvalues["network"] == "rwn" ) or
( keyvalues["network"] == "lwn" ) or