From 9b274a15e46ef2479a4c26dca85ed6c557f90255 Mon Sep 17 00:00:00 2001 From: Phil Varner Date: Mon, 2 Aug 2021 10:37:14 -0400 Subject: [PATCH] clarify 3d bbox query over 2d geometry (#174) --- item-search/README.md | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/item-search/README.md b/item-search/README.md index 1ccc6a24..e5f37ff6 100644 --- a/item-search/README.md +++ b/item-search/README.md @@ -101,8 +101,14 @@ should be returned. **datetime** The datetime parameter use the same allowed values as the [OAF datetime](http://docs.opengeospatial.org/is/17-069r3/17-069r3.html#_parameter_datetime) parameter. This allows for either a single [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339) datetime or an open or closed interval that also uses RFC 3339 datetimes. Additional details about this parameter can be found in the [Implementation Recommendations](../implementation.md#datetime-parameter-handling). -**bbox** Represented using either 2D or 3D geometries. The length of the array must be 2\*n where n is the number of dimensions. The array contains all axes of the southwesterly most extent followed by all axes of the northeasterly most extent specified in Longitude/Latitude or Longitude/Latitude/Elevation based on [WGS 84](http://www.opengis.net/def/crs/OGC/1.3/CRS84). When using 3D geometries, the elevation of the southwesterly most extent is the minimum elevation in meters and the elevation of the northeasterly most extent is the maximum. - +**bbox** Represented using either 2D or 3D geometries. The length of the array must be 2\*n where +*n* is the number of dimensions. The array contains all axes of the southwesterly most extent +followed by all axes of the northeasterly most extent specified in Longitude/Latitude or +Longitude/Latitude/Elevation based on [WGS 84](http://www.opengis.net/def/crs/OGC/1.3/CRS84). +When using 3D geometries, the elevation of the southwesterly most extent is the minimum elevation +in meters and the elevation of the northeasterly most extent is the maximum. When filtering with +a 3D bbox over Items with 2D geometries, it is assumed that the 2D geometries are at +elevation 0. ## Response