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We have a requirement to email out a map showing a particular feature in our database. When the query is made to generate the map all it has is a feature id. All the queries I've seen to MapServer/WMS include a BBOX. Is it possible to calculate the BBOX based on the feature id?

The feature id will be stored in a PostGIS/PostgreSQL database.

  • can your client access the database directly? – Ian Turton Aug 10 at 15:06
  • Its possible but I was trying to do it with just one query. – Tommie Jones Aug 10 at 19:06
  • You can use a WFS call to GetFeatureById – nmtoken Aug 11 at 17:38
  • All WMS GetMap requests require a BBOX, with extents specified in the coordinate reference system of the request data. That's not specific to a MapServer WMS. Any BBOX can be specified, it doesn't have to match the extent of the feature (but if if it doesn't coincide, you'll get no map image) – nmtoken Aug 12 at 9:20
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Neither the WMS protocol nor any of the other MapServer APIs have a mechanism to automatically set the map position and zoom level based on a geometry object.

You have to retrieve the bounding box with a separate query (through WFS, or directly to the database).

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