psycopg : web service

From: lcelati(at)latitude-geosystems(dot)com
To: psycopg(at)postgresql(dot)org
Subject: psycopg : web service
Date: 2014-05-20 15:36:27
Message-ID: 20140520173627.07hlxpazqcwgcwcc@webmail.latitude-geosystems.com
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Dear all,

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 ?

In advance, thank you to throw light for me.

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