Taking a tour of pygeoapi
At this point, you’ve installed pygeoapi, set configurations and started the server.
pygeoapi’s default configuration comes setup with two simple vector datasets, a STAC collection and a sample process. Note that these resources are straightforward examples of pygeoapi’s baseline functionality, designed to get the user up and running with as little barriers as possible.
Let’s check things out. In your web browser, go to http://localhost:5000
All pygeoapi URLs have HTML and JSON representations. If you are working through a web browser, HTML is always returned as the default, whereas if you are working programmatically, JSON is always returned.
To explicitly ask for HTML or JSON, simply add
f=json to any URL accordingly.
Each web page provides breadcrumbs for navigating up/down the server’s data. In addition, the upper right of the UI always has JSON and JSON-LD links to provide you with the current page in JSON if desired.
The landing page provides a high level overview of the pygeoapi server (contact information, licensing), as well as specific sections to browse data, processes and geospatial files.
The collections page displays all the datasets available on the pygeoapi server with their title and abstract. Let’s drill deeper into a given dataset.
Let’s drill deeper into a given dataset. Here we can see the
obs dataset is described along
with related links (other related HTML pages, dataset download, etc.).
The ‘View’ section provides the default to start browsing the data.
The ‘Queryables’ section provides a link to the dataset’s properties.
The queryables endpoint provides the collection’s queryable properties and associated datatypes.
This page displays a map and tabular view of the data. Features are clickable on the interactive map, allowing the user to drill into more information about the feature. The table also allows for drilling into a feature by clicking the link in a given table row.
Let’s inspect the feature close to Toronto, Ontario, Canada.
This page provides an overview of the feature and its full set of properties, along with an interactive map.
Publishing vector data to OGC API - Features for more OGC API - Features request examples.
Add an item to a collection (using curl):
curl -XPOST -H "Content-Type: application/geo+json" http://localhost:5000/collections/canada-metadata/items -d @new-item.json
Update an item in a collection (using curl):
curl -XPUT -H "Content-Type: application/geo+json" http://localhost:5000/collections/canada-metadata/items/item1 -d @updated-feature.json
Delete an item from a collection:
curl -XDELETE http://localhost:5000/collections/canada-metadata/items/item1
Collection coverage schema
This page provides information on a collection coverage information.
Collection coverage data
This page provides a coverage in CoverageJSON format.
Publishing raster data to OGC API - Coverages for more OGC API - Coverages request exampless.
Datasets can be made available as dynamic maps:
Publishing maps to OGC API - Maps for more OGC API - Maps request examples.
A given collection or any data type can additionally be made available as tiles (map tiles, vector tiles, etc.). The following page provides an overview of a collection’s tiles capabilities (tile matrix sets, URI templates, etc.)
From the abovementioned page, we can find the URI template:
This page provides freeform tiles metadata.
This page provides metadata catalogue search capabilities
Publishing metadata to OGC API - Records for more OGC API - Records request examples.
See the Transactions section for examples.
The processes page provides a list of process integrated onto the server, along with a name and description.
Expand with more info once OAProc HTML is better flushed out.
Publishing processes via OGC API - Processes for more OGC API - Processes request examples.
Environmental data retrieval
This page provides, in addition to a common collection description, specific link relations for EDR queries if the collection has an EDR capability, as well as supported parameter names to select.
This page executes a position query against a given parameter name, providing a response in CoverageJSON.
Publishing data to OGC API - Environmental Data Retrieval for more OGC API - EDR request examples.
This page provides a Web Accessible Folder view of raw geospatial data files. Users can navigate and click to browse directory contentsor inspect files. Clicking on a file will attempt to display the file’s properties/metadata, as well as an interactive map with a footprint of the spatial extent of the file.
Publishing files to a SpatioTemporal Asset Catalog for more STAC request examples.
The API documentation links provide a Swagger page of the API as a tool for developers to provide example request/response/query capabilities. A JSON representation is also provided.
The conformance page provides a list of URLs corresponding to the OGC API conformance classes supported by the pygeoapi server. This information is typically useful for developers and client applications to discover what is supported by the server.