Something's backwards, you're mapxy is 38.87795, -77.098617 but your extents are neg,pos,neg,pos? Also is your data in lat/lon?
Steve >>> On 5/7/2009 at 12:27 PM, in message <[email protected]>, Varun saraf <[email protected]> wrote: > Hi All, > > I am trying to integrate the census tracts on the google maps base. I > am using the tile mode and have successfully drawn the shape files > over the states of USA. I have some data in an access database that I > need to show to the user when he selects a particular census tract > (the shapes are polygons). However, since its a tile mode that I am > using on google maps, I am unable to understand how do I get the > information from mapserver as to which census tract was selected by > the user? Is there a way mapserver can send me the polygon selected > based on a co-ordinate lying inside the polygon? I know there is a way > by using queries and a querymap for doing this. The query that I am > using is as follows > > http://127.0.0.1:8123/cgi-bin/mapserv.exe?&map=C:/ms4w/apps/census/testMap.map&; > > mode=query&mapxy=38.87795 > -77.098617 > > I am providing a template in my map file that has the tract variables. > However, the result is always the same > > "msQueryByPoint(): Search returned no results. No matching record(s) > found." Is it that mapserver is trying to look for a point feature in > the location specifies by mapxy in the link above? How do I make > mapserver to look for a polygon enclosing this co-ordinate and return > me the result? I am attaching my mapfile also for reference. > > MAP > NAME testMap > STATUS ON > SIZE 600 300 > EXTENT -84 37 -75 40 > UNITS DD > SHAPEPATH "data" > IMAGECOLOR 255 255 255 > CONFIG "MS_ERRORFILE" "ms_error.txt" > > IMAGETYPE PNG > > WEB > IMAGEPATH "/ms4w/tmp/ms_tmp/" > IMAGEURL "/ms_tmp/" > END > > QUERYMAP > STATUS ON > STYLE HILITE > END > > LAYER > NAME "virginia" > STATUS DEFAULT > TYPE polygon > DATA tr51_d00 > DEBUG 5 > TOLERANCE 1000 > TOLERANCEUNITS pixels > > TEMPLATE "bodytemplate.html" > HEADER "imapheader.html" > FOOTER "imapfooter.html" > > CLASS > STYLE > OUTLINECOLOR 128 128 128 > COLOR 153 205 255 > END > TEMPLATE "pointTemplate.html" > END > > END > END > > Thanks, > Varun > > On Mon, May 4, 2009 at 3:30 PM, Varun saraf <[email protected]> wrote: >> Hi Steve, >> >> If I provide Mapserver with a point x,y in WGS84 projection (from >> google maps) as a query, can mapserver give me the enclosing polygon >> information (using point-in-polygon method or something else)? If yes, >> how? I have already drawn the polygons on google map using tile mode. >> Can you suggest me a book/doc that helps with querying mapserver? >> >> Thanks, >> Varun >> >> On Sun, May 3, 2009 at 9:56 AM, Steve Lime <[email protected]> >> wrote: >>> 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 <[email protected]> 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 <[email protected]>: >>>> 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: [email protected] >>>>> To: [email protected] >>>>> Subject: Re: [mapserver-users] Re: Dynamic data loading using Google maps >>>>> andMapserver >>>>> CC: [email protected] >>>>> >>>>> 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 <[email protected]> 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 <[email protected]> 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 >>>>> [email protected] >>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users >>>>> >>>>> _______________________________________________ >>>>> mapserver-users mailing list >>>>> [email protected] >>>>> 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 >>>> [email protected] >>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users >>>> >>>> >>> _______________________________________________ >>> mapserver-users mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/mapserver-users >>> >>> >> > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
