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

[Will Richardson]

I think you can query an item after addFeature. In my example below, if i 
comment out the addFeature line then i get 0 back in the cache result. Adding 
the line back into the code, i get 1 result back. 

for some reason though, the shape index is not being set. I'll continue to 
research. thank you for your help.

Quoting Sean Gillies <sgillies at frii.com>:

> Sorry, I don't have any pre-4 versions of MapServer around these days,
> so I can't say for sure -- but I don't think that inline features
> such as those added with addFeature() are queryable in this way.
> Inline features are not really meant for this purpose, they are more
> for annotation, one-off markers, display-only uses.
> 
> Sean
> 
> On Mar 9, 2004, at 12:26 PM, Will Richardson wrote:
> 
> >
> > sorry, the problem is that shapeindex is -1 and tileindex is -1 so 
> > getShape
> > returns a null object as it can't find any shape. I am using mapscript 
> > for
> > mapserver 3.6.3 as this is the only version i have found that i can 
> > get java
> > mapscript to work.
> >
> > my understanding is that the shape and tile index would be set in the 
> > layer
> > after i add a feature but then when i query the layer i do find 1
> > resultCacheMemberObj but the values in there are -1. How do i fix this?
> >
> > in the java mapscript version i have, the code you have below is 
> > wrapped so
> > that the java method i call (getShape) does return a shapeObj.
> >
> > thanks
> >
> > Quoting Sean Gillies <sgillies at frii.com>:
> >
> >> 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
> >>
> >>
> >
> >
> >
> >
> --
> Sean Gillies
> sgillies at frii dot com
> http://users.frii.com/sgillies
> 
>