View source for How to modify your project's WFS url to filter on attributes

When using the WFS endpoint from the {{software}}, the used URL can be modified to add additional data or filters to the data. Geographical data can be filtered by their attributes. I.e. a url can be modified so that only features with a specific attribute are made available.

{{howto|title=filter WFS data on attributes
| Find the geographical data you wish to export and select its export option
| In the export window, select the  "with attribute" option
| Select the attribute you wish to filter on
| At the export options, select the "Copy URL" option of the Web Feature Service
| The desired url is not copied on your clipboard, and can be pasted in your desired GIS application.
}}

This will change a url of the following form, which retrieves all constructions:
{{code|1=<nowiki>https://development.tygron.com/api/session/wfs/buildings?&token=06931643hoiXvvL8QXszPrVCv8m3lZ24</nowiki>}}
into a url of the following form, which only exposes constructions with the "MONUMENTAL" attribute:
{{code|1=<nowiki>https://development.tygron.com/api/session/wfs/buildings-monumental?&token=06931643hoiXvvL8QXszPrVCv8m3lZ24</nowiki>}}
The WFS endpoint can also be further specifc by adding a [[category]]:
{{code|1=<nowiki>https://engine.tygron.com/api/session/wfs/buildings-education</nowiki>}}
Combined with an attribute, you can even access the following WFS endpoint:
{{code|1=<nowiki>https://engine.tygron.com/api/session/wfs/buildings-education-primary_school</nowiki>}}

{{article end
|seealso=*[[WFS]]
}}

[[Category:How-to's]][[Category:WFS]]