Cartography: Annotate images and maps (module for Omeka S)

Cartography is a module for Omeka S that allows to annotate (to draw points, lines, polylines, polygons, etc.) an image or a map with the web annotation vocabulary and the web annotation data model.

Maps can be georeferenced (wms) or ungeoreferenced images, so it is possible to annotate any images, even non-cartographic ones.

Installation

This module requires the modules Annotate and Data Type Geometry. If the module Generic is used, it must be version greater or equal to 3.0.16.

The module uses external libraries, so use the release zip to install it, or use and init the source.

See general end user documentation for installing a module.

• From the zip

Download the last release Cartography.zip from the list of releases (the master does not contain the dependency), and uncompress it in the modules directory.

• From the source and for development

If the module was installed from the source, rename the name of the folder of the module to Cartography, go to the root of the module, and run:

    npm install
    composer install
    gulp

Quick start

The module allows to annotate standard images and georeferenced maps.

• To annotate a still image, simply upload it as media.
• To annotate a georeferenced image, the wms url should be set as URI in dcterms:spatial, for example: https://mapwarper.net/maps/wms/14068 with label Us and territories. There can be multiple wms layers, for example you can add the Roads to Santiago de Compostela in Spain too with the url https://www.ign.es/wms-inspire/camino-santiago?layers=PS.ProtectedSite.

Then, simply open the item (the display view, not the edition view, because the annotations are saved outside of the resource metadata), go to the tabs Describe or Locate, then annotate.

There may be multiple images and georeferenced maps. Furthermore, the upper maps are displayed too: the item sets wms layers are displayed with the item one, and the item ones with the media one.

Notes

• A geometry can have only one description, because there is only one popup. So only one body is managed, except when there are links.
• According to the Annotation data model, when a geometry is linked to a resource, the motivation is forced to "linking". Furthermore, the annotation body is the related resource and the target is the geometry, like all other motivations. Nevertheless, a description can be appended too, with a second motivation. In that case, the description describes the target, like always, so it is not a description of the links.

Configuration

Forms

The images and the maps can be described with any metadata. These metadata are listed in a standard Òmeka resource template, but it must have the class oa:Annotation.

The images and the maps can be described with any metadata. Nevertheless, it is recommended to use standard annotations ones, in particular rdf:value for the body (equivalent to dcterms:description for the resources) and oa:motivatedBy for annotation itself (to simplify the search). The relations with other resources (for example identification of an object on an image is an image of another item) should use the element oa:hasBody.

Note that according to the Open Annotation data model, an annotation is divided in three part: the annoation itself, one or more target (only one with this module) and zero or more bodies (a description, a link, etc.). So the properties of the annoations should be attached to one of this part via the resource template, so they will be saved regularly. It's particularly important for the non-standard metadata (the default one are automapped according to the data model, when possible). The default automapping is set in a config file of the module Annotate and can be updated.

There may be one or multiple forms for each tab (Describe and Locate), for example one to describe object, another one to identify people, and another one to describe place. They are selected in the main settings of Omeka S.

Ontologies

The annotations uses the web annotation vocabulary.

Locate georeferenced images

The base maps of the tab "Locate" can be customized. Just set it as js in the config. For example, to include the French IGN map service with the default map, fill the text area with the code below.

/**
 * Define the layer type:
 * - GEOGRAPHICALGRIDSYSTEMS.MAPS
 * - GEOGRAPHICALGRIDSYSTEMS.MAPS.SCAN-EXPRESS.CLASSIQUE
 * - GEOGRAPHICALGRIDSYSTEMS.MAPS.SCAN-EXPRESS.STANDARD
 *
 * @url https://geoservices.ign.fr
 */
var layerIGNScanStd = 'GEOGRAPHICALGRIDSYSTEMS.MAPS.SCAN-EXPRESS.STANDARD';
// For test only. Get a free key for production on https://geoservices.ign.fr/blog/2018/09/06/acces_geoportail_sans_compte.html.
var ignKey = 'choisirgeoportail';
var url = 'https://wxs.ign.fr/' + ignKey + '/geoportail/wmts';
var ign = new L.TileLayer.WMTS(url, {
   layer: layerIGNScanStd,
   style: 'normal',
   tilematrixSet: 'PM',
   format: 'image/jpeg',
   attribution: '&copy; <a href="https://www.ign.fr">IGN</a>',
});

baseMaps = {
    'Streets': L.tileLayer.provider('OpenStreetMap.Mapnik'),
    'Satellite': L.tileLayer.provider('Esri.WorldImagery'),
    'Terrain': L.tileLayer.provider('Esri.WorldShadedRelief'),
    'IGN': ign,
};

Note: the key provided here for access to IGN services must be used for test purpose only. In production, you must register to get a free ign key.

Describe still images

A similar js can be added for images to describe, but is not managed directly by the module currently.

Geometries

The geometries are saved as standard Omeka values and indexed in a specific table with a spatial index for quick search via the module Data Type Geometry.

Warning: The geometry "Circle" is not managed by WKT or by GeoJSON, but only by the viewer. It is saved as a POINT in the database, without radius.

JSON-LD and GeoJSON

According to the discussion on the working group of JSON-LD and GeoJSON, the GeoJson cannot be used in all cases inside a JSON-LD. So the representation uses the data type http://www.opengis.net/ont/geosparql#wktLiteral of the [OGC standard]. The deprecated datatype http://geovocab.org/geometry#asWKT is no more used.

{
    "@value": "POINT (2.294497 48.858252)",
    "@type": "http://www.opengis.net/ont/geosparql#wktLiteral"
}

TODO

• Add a configurable list of styles in the style editor (or replace the fields used to edit styles).
• Add the specific config of the wmts at the site level.

Warning

Use it at your own risk.

It’s always recommended to backup your files and your databases and to check your archives regularly so you can roll back if needed.

Troubleshooting

See online issues on the module issues page on GitHub.

License

This module is published under the CeCILL v2.1 licence, compatible with GNU/GPL and approved by FSF and OSI.

This software is governed by the CeCILL license under French law and abiding by the rules of distribution of free software. You can use, modify and/ or redistribute the software under the terms of the CeCILL license as circulated by CEA, CNRS and INRIA at the following URL "http://www.cecill.info".

As a counterpart to the access to the source code and rights to copy, modify and redistribute granted by the license, users are provided only with a limited warranty and the software’s author, the holder of the economic rights, and the successive licensors have only limited liability.

In this respect, the user’s attention is drawn to the risks associated with loading, using, modifying and/or developing or reproducing the software by the user in light of its specific status of free software, that may mean that it is complicated to manipulate, and that also therefore means that it is reserved for developers and experienced professionals having in-depth computer knowledge. Users are therefore encouraged to load and test the software’s suitability as regards their requirements in conditions enabling the security of their systems and/or data to be ensured and, more generally, to use and operate it in the same conditions as regards security.

The fact that you are presently reading this means that you have had knowledge of the CeCILL license and that you accept its terms.

Libraries

This module uses many open source leaflet libraries. See [asset/vendor] for details.

Copyright

• See asset/vendor/ and vendor/ for the copyright of the libraries.
• Some portions are adapterd from the modules Numeric data types and Neatline.
• Copyright Daniel Berthereau, 2018, (see Daniel-KM on GitHub)

This module was built first for the French École des hautes études en sciences sociales EHESS.