looks like raster data in latlon do not return results when the map projection is in a projected CRS. Having any type of projected CRS for the raster data works fine with projected map CRS. Also having everything in latlon works afair...
This is not a problem that can be handled on the p.mapper side since it uses only standard MapScript functionality, and that does not seems to work properly in your combination. You could ask about that issue on the Mapserver mailing list. The only direct workaround I see is to re-project your raster dataset from latlon to a metrical projection system, like UTM, or for larger areas Lambert EA or spherical mercator. armin On 27/06/2011 19:38, Matt Doggett wrote: > Thanks Armin- > > I got this all correct now. The problem I discovered is that my map > display is projected but my raster is not. While the vector queries handle > this just fine, the raster query does not correctly translate the > unprojected raster into projected map units. Is this a problem that I can > correct in p.mapper code somewhere? > > Matt > > -----Original Message----- > From: Armin Burger [mailto:armin.bur...@gmail.com] > Sent: Saturday, June 25, 2011 5:09 AM > To: pmapper-users@lists.sourceforge.net > Subject: Re: [pmapper-users] raster pixel query/identify > > see > > http://svn.pmapper.net/trac/browser/trunk/pmapper/config/dev/pmapper_demo_de > v.map > > and > > http://mapserver.org/input/raster.html#raster-query > > armin > > On 25/06/2011 00:37, Matt Doggett wrote: >> How can I query/identify the pixel/cell value of a raster at the >> location of mouse click? I've searched online and have found vague >> older references to a pmapper_demo_dev.map and a "corine" layer (which >> apparently doesn't exist >> anymore) that demonstrates how to use metadata tags for use with >> rasters to query/identify. I think I've figured out the METADATA tags >> that I should use, But nothing I've tried yet returns the pixel value of > the raster. >> Mapserver renders this raster layer without any problem. How do I >> identify/query the pixel cell value? >> >> >> >> I'm using p.mapper 4.1.1 and php_mapscript 5.6. >> >> >> >> The layer snippet from my mapfile is below. >> >> >> >> Many thanks. Matt >> >> >> >> >> >> LAYER >> >> NAME "ppt" >> >> GROUP "ppt" >> >> DATA "precipitation_data.bil" >> >> PROJECTION >> >> "proj=latlong" >> >> END >> >> STATUS ON >> >> TYPE RASTER >> >> UNITS METERS >> >> TEMPLATE void >> >> TOLERANCEUNITS pixels >> >> TOLERANCE 0 >> >> METADATA >> >> "DESCRIPTION" "Rainfall data" >> >> "RESULT_HEADERS" "xcoord,ycoord" >> >> "RESULT_FIELDS" "x,y" >> >> END >> >> ---------------------------------------------------------------------- >> -------- All the data continuously generated in your IT infrastructure >> contains a definitive record of customers, application performance, >> security threats, fraudulent activity and more. Splunk takes this data >> and makes sense of it. Business sense. IT sense. Common sense.. >> http://p.sf.net/sfu/splunk-d2d-c1 >> _______________________________________________ >> pmapper-users mailing list >> pmapper-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/pmapper-users >> > > > ---------------------------------------------------------------------------- > -- > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security threats, > fraudulent activity and more. Splunk takes this data and makes sense of it. > Business sense. IT sense. Common sense.. > http://p.sf.net/sfu/splunk-d2d-c1 > _______________________________________________ > pmapper-users mailing list > pmapper-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pmapper-users > > ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2d-c2 _______________________________________________ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users
