[mapserver-users] Attribute query at geographic coordinate

[Fawcett, David (MPCA)]

If you didn't need to use WFS and just wanted to do MapServer queries, you could put together a template that would build you a list.  Take a look at the examples on this page:  http://mapserver.org/output/template_output.html

The JSON example is probably the most applicable.

Like others have mentioned, 500 data layers won't be efficient, so you may want to explore other data organization ideas.

David.



-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Robert Sanson
Sent: Sunday, November 13, 2011 6:34 PM
To: mapserver-users at lists.osgeo.org; Peter Weilandt
Subject: Re: [mapserver-users] Attribute query at geographic coordinate

Hi Peter

You will have to write some of the server-side code for saving the results into a list, but the spatial query is called a GetFeatureInfo request, which is part of the WMS spec, which Mapserver can do well. Here is the format of a request:

http://<myserver>/cgi-bin/mapserve.exe?service=WMS&version=1.1.1&request=GetFeatureInfo&LAYERS=mapsheet&QUERY_LAYERS=mapsheet&INFO_FORMAT=text/plain&SRS=EPSG:27200&BBOX=2435500,5843425,2437500,5845425&WIDTH=256&HEIGHT=256&X=128&Y=128

Kind regards,

Robert Sanson

>>> Peter Weilandt <PeterWeilandt at shaw.ca> 14/11/2011 1:07 p.m. >>>
I stumbled across MapServer in my search for a tool to use in a website.  I want to develop a website that will use a coordinate (lat & long), which is easily obtained from a user on the client side by clicking on a Google map, and then transferring this coordinate to the server side where it will be used to sequentially query many (500+) shapefile polygon layers, extracting the values from 2 fields from each layer at this coordinate, saving these values in a list (Excel, textfile?), and then using this list to return values to the user on the client side.  This sounds simple in concept, but is MapServer a tool that can accomplish this and, if so, are there any examples showing the code to use for such a query?



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