[mapserver-users] Re: mapscript querybypoint on tiled raster layers?

[Mike Leahy]

Ok...I figured out the problem pretty much right after I clicked send on 
that last message.  I had generated my tile index.shp with relative 
paths for the LOCATION field (i.e., relative to the shp file).  I just 
regenerated it with absolute path names, and it the query function works 
fine.

So would this be a known bug of any sort, or is it just bad practice to 
use relative filenames with MapServer?

Regards,
Mike

Mike Leahy wrote:
Hello list,

I'm sure this one has come up before, but I can't seem to figure out 
what I need to do.  I have some tiled raster layers that I've got in a 
mapfile that is being used for generating ka-map tiles.  I'm trying to 
query the values on these layer using the queryByPoint function in 
php_mapscript.  I have a generic identify function that returns results 
for any of my vector layers, and for non-tiled raster layers - just not 
for the tiled raster layers.  Is it possible to query tiled raster 
layers?  If so, can someone spot what I'm doing wrong below?

The tiled-raster layers in the mapfile generally look like this:

 LAYER
  NAME "Tiled Raster"
  GROUP "Tiled Raster"
  STATUS ON
  TYPE RASTER
  TILEINDEX "/data/index.shp"
  TILEITEM "LOCATION"
  METADATA
   "imageformat" "AGG_JPEG"
  END
  PROJECTION
   "init=epsg:4326"
  END
 END


And here is the function in PHP:


 public function Identify($oMap,$layer,$x,$y,$cellSize)
 {
  $oLayer = $oMap->getLayerByName($layer);
  if (in_array($oLayer->type,
   array(MS_LAYER_POINT,MS_LAYER_LINE,MS_LAYER_POLYGON)))
  {
   $oLayer->set("toleranceunits",$oMap->units);
   $oLayer->set("tolerance",$cellSize*3);
  }
  else
  {
   $oLayer->set("tolerance",0);
  }

  $oLayer->set("template","dummy.html");

  $oQPoint = ms_newPointObj();
  $oQPoint->setXY($x,$y);

  $aResults = array();

  if (@$oLayer->queryByPoint($oQPoint,MS_MULTIPLE,$oLayer->tolerance) == 
MS_SUCCESS)
  {
   $oLayer->open();
   $nResults = $oLayer->getNumResults();

   for ($i=0;$i<$nResults;$i++)
   {
    $oResult = $oLayer->getResult($i);
    $oShape = $oLayer->getShape($oResult->tileindex,
     $oResult->shapeindex);
    $aResults[] = array($oResult,$oShape);
   }
  }

  return $aResults;
 }


Thanks in advance for any help,
Mike

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