[mapserver-users] Re: Dynamic data loading using Google maps andMapserver

[Steve Lime]

Both examples show how to do this. You have to create a query using 
the coordinate from Google to access MapServer. My example uses the
principle to query points but would work for polygons (which are actually
easier). You could issue straight MapServer queries:

  http://.../cgi-bin/mapserv?mode=query&map=something.map&mapxy=google_x+google_y&qlayer=the_polygons

or do a WFS query. Since you're already using straight MapServer the former
would probably be easiest.

Steve

>>> Varun saraf <vsaraf.gmu at gmail.com> 05/02/09 1:34 PM >>>
Hi,

Thanks a lot Jim and Steve. These are great examples but I am dividing
each state of USA into about 1300 polygons and I need a way to find
which polygon is selected by the user. I tried building Gpolygons
using the polygon data that i have (after converting it into a GML
file) but it makes Google damn slow to redraw the polygons on zoom in
and zoom out. The tile mode in mapserver is much faster.

Now, After I draw the polygon in tile mode using mapserver, Is there a
way Mapserver can return to me the specific polygon info (say
co-ordinates or any other data in the dbf file relating to that
polygon) when I select it on google map? Goggle I believe can give me
the exact co-ordinates of the point I clicked. Can mapserver use this
point location to find which polygon was selected?

Thanks,
Varun

2009/5/2 Jim Strevinas <voas_acc at hotmail.com>:
> A beautiful example that uses the Google Maps API is:
>
> http://www.dyasdesigns.com/geoxml/gmlusa.htm
>
> It makes use of an API plugin called geoxml that can load XML data which can
> be produced by
> a WFS server. In the source code, a static GML file is used but a google
> search shows that it can
> connect to a live WFS server using the URL.
>
>> Date: Sat, 2 May 2009 09:28:01 -0500
>> From: Steve.Lime at dnr.state.mn.us
>> To: vsaraf.gmu at gmail.com
>> Subject: Re: [mapserver-users] Re: Dynamic data loading using Google maps
>> andMapserver
>> CC: mapserver-users at lists.osgeo.org
>>
>> One way to do that is to construct MapServer queries based on the event
>> and submit them using AJAX. This site does just that but with OpenLayers:
>>
>> http://www.dnr.state.mn.us/waters/csg/index_copy.html
>>
>> Click on the dots and a MapServer query is done behind the scenes. If
>> successful
>> a little window control is populated, if not, then nothing happens. Simple
>> templates
>> are used to present the information.
>>
>> Steve
>>
>> >>> Varun saraf <vsaraf.gmu at gmail.com> 05/01/09 11:54 AM >>>
>> Hi,
>>
>> I just had a look at ImageMap Template on "Output generation"...Can
>> this be used on google maps to get information pooped up on a
>> mouseover or mouseclick in tile mode? If not, what is it that I can do
>> to get a similar result when using Mapserver with google maps?
>>
>> Regards,
>> Varun
>>
>> On Thu, Apr 30, 2009 at 6:30 PM, Varun saraf <vsaraf.gmu at gmail.com> wrote:
>> > Hi,
>> >
>> > I have successfully drawn layers on of google maps as base using
>> > mapserver. However, I am trying to figure out how to get data
>> > dynamically displayed on the web page when a user clicks on a certain
>> > area. For example, I have divided the entire state of virginia into
>> > many sectors (using a polygon shp file). My requirement is that I want
>> > data to come up on the map/web page when the user selects a particular
>> > sector. I know google provides me with an event api for clicking on
>> > the map but how do I pass this event to mapserver so it can send me
>> > the label for that sector from the shape file? I need to be able to
>> > recognize what sector the user has clicked. Is this possible using
>> > just the mapserv cgi script and a map file or a MapScript has to be
>> > written/used? Can someone point me in the right direction here? Even
>> > providing the link for a previous discussion on this topic would help.
>> >
>> > Thanks,
>> > Varun
>> >
>> _______________________________________________
>> 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
>
> ________________________________
> Invite your mail contacts to join your friends list with Windows Live
> Spaces. It's easy! Try it!
> _______________________________________________
> 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