[mapserver-users] querying in mode=tile

[Steve Lime]

You can also bail on JSON and just return HTML from your template.
Here's a trivial example that uses GMap2 API and mode=tile for an
overlay layer and a straight mapserver point query for handling
clicks. The actual calls to the CGI are being proxied but it's
straight CGI. I look at the query result and if there's an error I
don't display the result. Watch with Firebug to see what's moving
between the client and server.

  http://www.dnr.state.mn.us/officerpatrolareas/index.html

Here's another one with GMap3 API that uses a mod-geocache tileset for
an overlay and straight MapServer 6.0 queries for handling a click
event tied to the map. I check for an error and if ok I redirect the
user to the contents of the template (in this case just a URL to a
PDF). Kind of a Google maps imagemap.

  http://www.dnr.state.mn.us/forestlegacy/hunting.html

Steve

On Sun, Sep 11, 2011 at 11:41 PM, Rahkonen Jukka
<Jukka.Rahkonen at mmmtike.fi> wrote:
> Hi,
>
> If you happen to have a little bit time for considering some day, consider also using WFS for queries.  And if you cannot manage to get the geojson outputformat work through the OGR outputformat system in a minute, you can install TinyOWS besides Mapserver. It can read the same mapfiles and it can output geojson out-of-the-box.
>
> -Jukka Rahkonen-
>
> Mr. Puneet Kishor wrote:
>
>>On Sep 11, 2011, at 10:52 PM, Richard Greenwood wrote:
>
>>> On Sun, Sep 11, 2011 at 9:37 PM, Mr. Puneet Kishor <punk.kish at gmail.com> wrote:
>>
>>>> However, since I am not using MapScript (even though I would prefer to), I would have to implement both CGI and MapScript to do what you are suggesting above -- CGI to display the map and MapScript to do the query.
>>
>>> But my point was that you can do the query without mapserver at all if
>> the data is in postgis. Use a server-side language such as Perl or PHP
>> to pass the request to postgis, which can do a spatial query, and then
>> Perl or PHP can format the result as JSON and return it to the page
>> (via AJAX).
>
>
>> On second reading, I now get what you are saying. Strange that it never occurred to me. Sounds very sensible, and I will implement it tomorrow. That way I can get away from CGI `mode=query` and its TEMPLATE-ing vagaries. Yes, my data are in Pg, so I can do all my querying with Perl.
>
>> Wish I could do away with `mode=tile` and also get tiles back via MapScript. Then my solution would be complete.
>
>>Thanks for this really useful hint (more like making me see the obvious that I was missing for some reason).
>
> Puneet._______________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users
> _______________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>