[Mapserver-users] Query by point shape and tile indexes are -1

[Sean Gillies]

On Mar 9, 2004, at 11:45 AM, Will Richardson wrote:

> Hello,
>
> I am trying to do a query after i add a feature to a layer and the 
> shape and
> tile indexes are -1 so i can't get the shape that was queried. Below 
> is my
> code in java, if you have any suggestions, please let me know.
>
> thanks
>
>             layerObj layer = map.getLayerByName( "towermark" );
>             layer.setStatus( MapScript.MS_ON );
>
>             pointObj myHouse = new pointObj();
>             myHouse.setX( -104.06478597176886 );
>             myHouse.setY( 38.46972580576644 );
>
>             lineObj line = new lineObj();
>             line.add( myHouse );
>             shapeObj shape = new shapeObj( MapScript.MS_SHAPE_POINT );
>             shape.add( line );
>             layer.addFeature( shape );
>
>             imageObj image = map.draw();
>
>             pointObj queryPoint = new pointObj();
>             queryPoint.setX( -104.06478597176886 );
>             queryPoint.setY( 38.46972580576644 );
>             int result = layer.queryByPoint( map, queryPoint,
> MapScript.MS_SINGLE, 10 );
>
>             System.out.println( "result of query: " + result );
>             System.out.println( "MS_SUCCESS: " + MapScript.MS_SUCCESS 
> );
>             System.out.println( "MS_FAILURE: " + MapScript.MS_FAILURE 
> );
>
>             resultCacheObj cache = layer.getResultcache();
>             //prints 1
>             System.out.println( "number of results: " + 
> cache.getNumresults
> () );
>
>             resultCacheMemberObj resultObj = layer.getResult( 0 );
>             System.out.println( "shape index: " + 
> resultObj.getShapeindex() );
>             System.out.println( "tile index: " + 
> resultObj.getTileindex() );
>             System.out.println( "Class index: " + 
> resultObj.getClassindex() );
>
>             shape = layer.getShape( resultObj.getTileindex(),
> resultObj.getShapeindex() );
>             if ( shape != null )
>             {
>                 System.out.println( "shape.getNumvalues(): " +
> shape.getNumvalues() );
>             }
> ______


Will,

I think you forgot to ask your question ... you want to know why
getShape doesn't work as expected?

You don't say so, but I am assuming you are using a Java mapscript from
Mapserver 3.x?  True?  Well, one problem is that getShape doesn't
return a shapeObj.  Your code will have to be something like this:

shapeObj shape = shapeObj(layer.type);
layer.getShape(shape, resultObj.getTileindex(), 
resultObj.getShapeindex());

Hope this helps,
Sean

--
Sean Gillies
sgillies at frii dot com
http://users.frii.com/sgillies