I would like code a web service with python. I have already imported several vector data (land cover) and one Digital Elevation Model (raster layer) into my postgresql/postgis database (server side).
I succeed in connecting to my pg db via psycopg2.
Client side, operators use a client application (Developed with PHP / javascript / openlayers).
Objectives : Client side, once the layer would be selected,and once the operators have clicked on the map , they would like that usefull informations appear on the interface of the client application(kind of land cover, z of the DEM).
=> Regarding my python script, i have to type a SQL query in order to select usefull informations of the db layers. And, of course, the information must depend on geographic coordinates (Latitude Y/Longitute X). In a 2nd time, my script must produce a result(JSon type) for the client side.
It would be possible to help me regarding the coding in order to select usefull informations of the db layers. (depends on geographic coordinates x/y ? Could you throw light for me regarding the way to do this SQL query ?
