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

[Steve Lime]

Support for tile names relative to the tile index is brand new in 5.2 so in older versions
absolute paths or paths relative to the mapfile were your only options.

Steve

>>> On 7/29/2008 at 12:44 PM, in message <488F56FC.9070701 at alumni.uwaterloo.ca>,
Mike Leahy <mgleahy at alumni.uwaterloo.ca> wrote:
> 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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