geopython · tomkralidis · Jan 20, 2026 · Jan 17, 2026 · Jan 20, 2026
diff --git a/docs/source/configuration.rst b/docs/source/configuration.rst
@@ -225,6 +225,12 @@ default.
                   begin: 2000-10-30T18:24:39Z  # start datetime in RFC3339
                   end: 2007-10-30T08:57:29Z  # end datetime in RFC3339
                   trs: http://www.opengis.net/def/uom/ISO-8601/0/Gregorian  # TRS
+              # additional extents can be added as desired (1..n)
+              foo:
+                  url: https://example.org/def  # required URL of the extent
+                  range: [0, 10] # required overall range/extent
+                  units: °C  # optional units
+                  values: [0, 2, 5, 5, 10]  # optional, enumeration of values
           providers:  # list of 1..n required connections information
               - type: feature  # underlying data geospatial type. Allowed values are: feature, coverage, record, tile, edr
                 name: CSV  # required: plugin name or import path. See Plugins section for more information.

diff --git a/docs/source/plugins.rst b/docs/source/plugins.rst
@@ -30,10 +30,15 @@ The core pygeoapi plugin registry can be found in ``pygeoapi.plugin.PLUGINS``.
 
 Each plugin type implements its relevant base class as the API contract:
 
-* data providers: ``pygeoapi.provider.base``
-* output formats: ``pygeoapi.formatter.base``
-* processes: ``pygeoapi.process.base``
-* process_manager: ``pygeoapi.process.manager.base``
+* data providers:
+
+  * features/records/maps: ``pygeoapi.provider.base.BaseProvider``
+  * edr: ``pygeoapi.provider.base_edr.BaseEDRProvider``
+  * tiles: ``pygeoapi.provider.tile.BaseTileProvider``
+
+* output formats: ``pygeoapi.formatter.base.BaseFormatter``
+* processes: ``pygeoapi.process.base.BaseProcessor``
+* process_manager: ``pygeoapi.process.manager.base.BaseManager``
 
 .. todo:: link PLUGINS to API doc
 
@@ -150,7 +155,7 @@ option 2 above).
 Example: custom pygeoapi vector data provider
 ---------------------------------------------
 
-Lets consider the steps for a vector data provider plugin:
+Let's consider the steps for a vector data provider plugin:
 
 Python code
 ^^^^^^^^^^^
@@ -223,7 +228,7 @@ Each base class documents the functions, arguments and return types required for
 Example: custom pygeoapi raster data provider
 ---------------------------------------------
 
-Lets consider the steps for a raster data provider plugin:
+Let's consider the steps for a raster data provider plugin:
 
 Python code
 ^^^^^^^^^^^
@@ -278,6 +283,51 @@ Each base class documents the functions, arguments and return types required for
 
 .. _example-custom-pygeoapi-processing-plugin:
 
+Example: custom pygeoapi EDR data provider
+------------------------------------------
+
+Let's consider the steps for an EDR data provider plugin:
+
+Python code
+^^^^^^^^^^^
+
+The below template provides a minimal example (let's call the file ``mycooledrdata.py``:
+
+.. code-block:: python
+
+   from pygeoapi.provider.base_edr import BaseEDRProvider
+
+   class MyCoolEDRDataProvider(BaseEDRProvider):
+
+       def __init__(self, provider_def):
+           """Inherit from the parent class"""
+
+           super().__init__(provider_def)
+
+           self.covjson = {...}
+
+       def get_instances(self):
+           return ['foo', 'bar']
+
+       def get_instance(self, instance):
+           return instance in get_instances()
+
+       def position(self, **kwargs):
+           return self.covjson
+
+       def trajectory(self, **kwargs):
+           return self.covjson
+
+
+For brevity, the ``position`` function returns ``self.covjson`` which is a
+dictionary of a CoverageJSON representation.  ``get_instances`` returns a list
+of instances associated with the collection/plugin, and ``get_instance`` returns
+a boolean of whether a given instance exists/is valid.  EDR query types are subject
+to the query functions defined in the plugin.  In the example above, the plugin
+implements ``position`` and ``trajectory`` queries, which will be advertised as
+supported query types.
+
+
 Example: custom pygeoapi processing plugin
 ------------------------------------------
 

diff --git a/docs/source/publishing/ogcapi-coverages.rst b/docs/source/publishing/ogcapi-coverages.rst
@@ -89,11 +89,20 @@ The `Xarray`_ provider plugin reads and extracts `NetCDF`_ and `Zarr`_ data.
          format:
             name: zarr
             mimetype: application/zip
+         options:
+             zarr:
+                 consolidated: true
+             squeeze: true
+
 
 .. note::
    `Zarr`_ files are directories with files and subdirectories.  Therefore
    a zip file is returned upon request for said format.
 
+.. note::
+
+   ``options.zarr`` is a custom property that can be used to set `Zarr-specific open options`_.
+
 .. note::
    When referencing `NetCDF`_ or `Zarr`_ data stored in an S3 bucket, 
    be sure to provide the full S3 URL. Any parameters required to open the dataset
@@ -155,3 +164,4 @@ Data access examples
 .. _`Zarr`: https://zarr.readthedocs.io/en/stable
 .. _`GDAL raster driver short name`: https://gdal.org/drivers/raster/index.html
 .. _`pyproj.CRS.from_user_input`: https://pyproj4.github.io/pyproj/stable/api/crs/coordinate_system.html#pyproj.crs.CoordinateSystem.from_user_input
+.. _`Zarr-specific open options`: https://docs.xarray.dev/en/stable/generated/xarray.open_zarr.html
diff --git a/docs/source/publishing/ogcapi-edr.rst b/docs/source/publishing/ogcapi-edr.rst
@@ -90,11 +90,15 @@ The `xarray-edr`_ provider plugin reads and extracts `NetCDF`_ and `Zarr`_ data
    a zip file is returned upon request for said format.
 
 .. note::
+
+   ``options.zarr`` is a custom property that can be used to set `Zarr-specific open options`_.
+
+.. note::
+
    When referencing data stored in an S3 bucket, be sure to provide the full
    S3 URL. Any parameters required to open the dataset using fsspec can be added
    to the config file under `options` and `s3`, as shown above.
 
-
 SensorThingsEDR
 ^^^^^^^^^^^^^^^
 
@@ -143,3 +147,4 @@ Data access examples
 .. _`NetCDF`: https://en.wikipedia.org/wiki/NetCDF
 .. _`Zarr`: https://zarr.readthedocs.io/en/stable
 .. _`OGC Environmental Data Retrieval (EDR) (API)`: https://ogcapi.ogc.org/edr
+.. _`Zarr-specific open options`: https://docs.xarray.dev/en/stable/generated/xarray.open_zarr.html
diff --git a/docs/source/publishing/ogcapi-maps.rst b/docs/source/publishing/ogcapi-maps.rst
@@ -136,5 +136,9 @@ Data visualization examples
 
   * http://localhost:5000/collections/foo/map?bbox-crs=http%3A%2F%2Fwww.opengis.net%2Fdef%2Fcrs%2FEPSG%2F0%2F3857&bbox=4.022369384765626%2C50.690447870569436%2C4.681549072265626%2C51.00260125274477&width=800&height=600&transparent
 
+* map with vertical subset  (``extents.vertical`` must be set in resource level config)
+
+  * http://localhost:5000/collections/foo/map?bbox=-142,42,-52,84&subset=vertical(435)
+
 .. _`OGC API - Maps`: https://ogcapi.ogc.org/maps
 .. _`see website`: https://mapserver.org/mapscript/index.html
diff --git a/pygeoapi/api/__init__.py b/pygeoapi/api/__init__.py
@@ -7,7 +7,7 @@
 #          Colin Blackburn <colb@bgs.ac.uk>
 #          Ricardo Garcia Silva <ricardo.garcia.silva@geobeyond.it>
 #
-# Copyright (c) 2025 Tom Kralidis
+# Copyright (c) 2026 Tom Kralidis
 # Copyright (c) 2025 Francesco Bartoli
 # Copyright (c) 2022 John A Stevenson and Colin Blackburn
 # Copyright (c) 2023 Ricardo Garcia Silva
@@ -588,6 +588,7 @@ def get_exception(self, status: int, headers: dict, format_: str | None,
         """
 
         exception_info = sys.exc_info()
+
         LOGGER.error(
             description,
             exc_info=exception_info if exception_info[0] is not None else None
@@ -709,22 +710,22 @@ def landing_page(api: API,
         'title': l10n.translate('Collections', request.locale),
         'href': api.get_collections_url()
     }, {
-        'rel': 'http://www.opengis.net/def/rel/ogc/1.0/processes',
+        'rel': f'{OGC_RELTYPES_BASE}/processes',
         'type': FORMAT_TYPES[F_JSON],
         'title': l10n.translate('Processes', request.locale),
         'href': f"{api.base_url}/processes"
     }, {
-        'rel': 'http://www.opengis.net/def/rel/ogc/1.0/job-list',
+        'rel': f'{OGC_RELTYPES_BASE}/job-list',
         'type': FORMAT_TYPES[F_JSON],
         'title': l10n.translate('Jobs', request.locale),
         'href': f"{api.base_url}/jobs"
     }, {
-        'rel': 'http://www.opengis.net/def/rel/ogc/1.0/tiling-schemes',
+        'rel': f'{OGC_RELTYPES_BASE}/tiling-schemes',
         'type': FORMAT_TYPES[F_JSON],
         'title': l10n.translate('The list of supported tiling schemes as JSON', request.locale),  # noqa
         'href': f"{api.base_url}/TileMatrixSets?f=json"
     }, {
-        'rel': 'http://www.opengis.net/def/rel/ogc/1.0/tiling-schemes',
+        'rel': f'{OGC_RELTYPES_BASE}/tiling-schemes',
         'type': FORMAT_TYPES[F_HTML],
         'title': l10n.translate('The list of supported tiling schemes as HTML', request.locale),  # noqa
         'href': f"{api.base_url}/TileMatrixSets?f=html"
@@ -897,7 +898,10 @@ def describe_collections(api: API, request: APIRequest,
             'links': []
         }
 
-        bbox = v['extents']['spatial']['bbox']
+        extents = deepcopy(v['extents'])
+
+        bbox = extents['spatial']['bbox']
+        LOGGER.debug('Setting spatial extents from configuration')
         # The output should be an array of bbox, so if the user only
         # provided a single bbox, wrap it in a array.
         if not isinstance(bbox[0], list):
@@ -907,12 +911,13 @@ def describe_collections(api: API, request: APIRequest,
                 'bbox': bbox
             }
         }
-        if 'crs' in v['extents']['spatial']:
+        if 'crs' in extents['spatial']:
             collection['extent']['spatial']['crs'] = \
-                v['extents']['spatial']['crs']
+                extents['spatial']['crs']
 
-        t_ext = v.get('extents', {}).get('temporal', {})
+        t_ext = extents.get('temporal', {})
         if t_ext:
+            LOGGER.debug('Setting temporal extents from configuration')
             begins = dategetter('begin', t_ext)
             ends = dategetter('end', t_ext)
             collection['extent']['temporal'] = {
@@ -921,6 +926,24 @@ def describe_collections(api: API, request: APIRequest,
             if 'trs' in t_ext:
                 collection['extent']['temporal']['trs'] = t_ext['trs']
 
+        _ = extents.pop('spatial', None)
+        _ = extents.pop('temporal', None)
+
+        for ek, ev in extents.items():
+            LOGGER.debug(f'Adding extent {ek}')
+            collection['extent'][ek] = {
+                'definition': ev['url'],
+                'interval': [ev['range']]
+            }
+            if 'units' in ev:
+                collection['extent'][ek]['unit'] = ev['units']
+
+            if 'values' in ev:
+                collection['extent'][ek]['grid'] = {
+                    'cellsCount': len(ev['values']),
+                    'coordinates': ev['values']
+                }
+
         LOGGER.debug('Processing configured collection links')
         for link in l10n.translate(v.get('links', []), request.locale):
             lnk = {
@@ -990,13 +1013,13 @@ def describe_collections(api: API, request: APIRequest,
         if collection_data_type == 'record':
             collection['links'].append({
                 'type': FORMAT_TYPES[F_JSON],
-                'rel': 'http://www.opengis.net/def/rel/ogc/1.0/ogc-catalog',
+                'rel': f'{OGC_RELTYPES_BASE}/ogc-catalog',
                 'title': l10n.translate('Record catalogue as JSON', request.locale),  # noqa
                 'href': f'{api.get_collections_url()}/{k}?f={F_JSON}'
             })
             collection['links'].append({
                 'type': FORMAT_TYPES[F_HTML],
-                'rel': 'http://www.opengis.net/def/rel/ogc/1.0/ogc-catalog',
+                'rel': f'{OGC_RELTYPES_BASE}/ogc-catalog',
                 'title': l10n.translate('Record catalogue as HTML', request.locale),  # noqa
                 'href': f'{api.get_collections_url()}/{k}?f={F_HTML}'
             })
@@ -1021,13 +1044,13 @@ def describe_collections(api: API, request: APIRequest,
             LOGGER.debug('Adding feature/record based links')
             collection['links'].append({
                 'type': 'application/schema+json',
-                'rel': 'http://www.opengis.net/def/rel/ogc/1.0/queryables',
+                'rel': f'{OGC_RELTYPES_BASE}/queryables',
                 'title': l10n.translate('Queryables for this collection as JSON', request.locale),  # noqa
                 'href': f'{api.get_collections_url()}/{k}/queryables?f={F_JSON}'  # noqa
             })
             collection['links'].append({
                 'type': FORMAT_TYPES[F_HTML],
-                'rel': 'http://www.opengis.net/def/rel/ogc/1.0/queryables',
+                'rel': f'{OGC_RELTYPES_BASE}/queryables',
                 'title': l10n.translate('Queryables for this collection as HTML', request.locale),  # noqa
                 'href': f'{api.get_collections_url()}/{k}/queryables?f={F_HTML}'  # noqa
             })
@@ -1135,19 +1158,20 @@ def describe_collections(api: API, request: APIRequest,
             LOGGER.debug('Adding tile links')
             collection['links'].append({
                 'type': FORMAT_TYPES[F_JSON],
-                'rel': f'http://www.opengis.net/def/rel/ogc/1.0/tilesets-{p.tile_type}',  # noqa
+                'rel': f'{OGC_RELTYPES_BASE}/tilesets-{p.tile_type}',
                 'title': l10n.translate('Tiles as JSON', request.locale),
-                'href': f'{api.get_collections_url()}/{k}/tiles?f={F_JSON}'  # noqa
+                'href': f'{api.get_collections_url()}/{k}/tiles?f={F_JSON}'
             })
             collection['links'].append({
                 'type': FORMAT_TYPES[F_HTML],
-                'rel': f'http://www.opengis.net/def/rel/ogc/1.0/tilesets-{p.tile_type}',  # noqa
+                'rel': f'{OGC_RELTYPES_BASE}/tilesets-{p.tile_type}',
                 'title': l10n.translate('Tiles as HTML', request.locale),
-                'href': f'{api.get_collections_url()}/{k}/tiles?f={F_HTML}'  # noqa
+                'href': f'{api.get_collections_url()}/{k}/tiles?f={F_HTML}'
             })
 
         try:
             map_ = get_provider_by_type(v['providers'], 'map')
+            p = load_plugin('provider', map_)
         except ProviderTypeError:
             map_ = None
 
@@ -1158,15 +1182,36 @@ def describe_collections(api: API, request: APIRequest,
             map_format = map_['format']['name']
 
             title_ = l10n.translate('Map as', request.locale)
-            title_ = f"{title_} {map_format}"
+            title_ = f'{title_} {map_format}'
 
             collection['links'].append({
                 'type': map_mimetype,
-                'rel': 'http://www.opengis.net/def/rel/ogc/1.0/map',
+                'rel': f'{OGC_RELTYPES_BASE}/map',
                 'title': title_,
-                'href': f"{api.get_collections_url()}/{k}/map?f={map_format}"  # noqa
+                'href': f'{api.get_collections_url()}/{k}/map?f={map_format}'
             })
 
+            if p._fields:
+                schema_reltype = f'{OGC_RELTYPES_BASE}/schema',
+                schema_links = [s for s in collection['links'] if
+                                schema_reltype in s]
+
+                if not schema_links:
+                    title_ = l10n.translate('Schema of collection in JSON', request.locale)  # noqa
+                    collection['links'].append({
+                        'type': 'application/schema+json',
+                        'rel': f'{OGC_RELTYPES_BASE}/schema',
+                        'title': title_,
+                        'href': f'{api.get_collections_url()}/{k}/schema?f=json'  # noqa
+                    })
+                    title_ = l10n.translate('Schema of collection in HTML', request.locale)  # noqa
+                    collection['links'].append({
+                        'type': 'text/html',
+                        'rel': f'{OGC_RELTYPES_BASE}/schema',
+                        'title': title_,
+                        'href': f'{api.get_collections_url()}/{k}/schema?f=html'  # noqa
+                    })
+
         try:
             edr = get_provider_by_type(v['providers'], 'edr')
             p = load_plugin('provider', edr)
@@ -1217,6 +1262,10 @@ def describe_collections(api: API, request: APIRequest,
                         }
                     }
                 }
+
+                if request.format is not None and request.format == 'json':
+                    data_query['link']['type'] = 'application/vnd.cov+json'
+
                 collection['data_queries'][qt] = data_query
 
                 title1 = l10n.translate('query for this collection as JSON', request.locale)  # noqa
@@ -1334,9 +1383,14 @@ def get_collection_schema(api: API, request: Union[APIRequest, Any],
             p = load_plugin('provider', get_provider_by_type(
                 api.config['resources'][dataset]['providers'], 'coverage'))  # noqa
         except ProviderTypeError:
-            LOGGER.debug('Loading record provider')
-            p = load_plugin('provider', get_provider_by_type(
-                api.config['resources'][dataset]['providers'], 'record'))
+            try:
+                LOGGER.debug('Loading record provider')
+                p = load_plugin('provider', get_provider_by_type(
+                    api.config['resources'][dataset]['providers'], 'record'))
+            except ProviderTypeError:
+                LOGGER.debug('Loading edr provider')
+                p = load_plugin('provider', get_provider_by_type(
+                    api.config['resources'][dataset]['providers'], 'edr'))
     except ProviderGenericError as err:
         LOGGER.error(err)
         return api.get_exception(