[mapserver-users] Get the nearest layer with mapscript...

[Paul james]

Thanks Steve...
That worked !

On Wed, May 20, 2009 at 1:34 PM, Steve Lime <Steve.Lime at dnr.state.mn.us>wrote:

> You just need another loop...
>
> for( ...each layer...) {
>  layer = ... mapObj get layer ...
>
>  ... now your getNumResults() loop ...
> }
>
> Steve
>
> >>> Paul james <pauljame at gmail.com> 05/20/09 9:54 AM >>>
> Hi Steve!
> I didn't know that mapObj could call queryByPoint as well ... Thanks...
> But, How can I get the feature selected after query ?
>
> Using LayerObj I did that (using layer.getNumResults() )
>
> if (_layer.queryByPoint(MapaObj, _point, 0, -2) == 0)
>            {
>                for (int i = 0; i < _layer.getNumResults(); i++)
>                {
>                    resultCacheMemberObj _result = _layer.getResult(i);
>
>                    return _result.shapeindex.ToString();
>                }
>            }
>
> How can I do that using MapObj ?
>
> thanks!
>
>
> On Wed, May 20, 2009 at 10:51 AM, Steve Lime
> <Steve.Lime at dnr.state.mn.us>wrote:
>
> > If you're doing point queries MapServer/MapScript can do this for you.
> > You do a
> > mapObj.queryByPoint with the MS_SINGLE mode and then the function will
> > identify
> > the closest feature (considering TOLERANCEs!) in the top-most ACTIVE
> > layer.
> >
> > This site uses this to it's advantage...
> >
> >  http://www.dnr.state.mn.us/maps/compass.html
> >
> > A query drops through the layers until a match is hit.
> >
> > Even with other geometry types based on what was described you can
> > probably do
> > it pretty easily. You'd use one of the other query methods and then
> once
> > the query
> > is done loop through your layer stack backwards (e.g. starting at the
> > top) and stop
> > when you find one with results.
> >
> > Steve
> >
> > >>> Paul james <pauljame at gmail.com> 05/20/09 7:56 AM >>>
> > Thanks Pano...
> > But It́s not that simple...
> > What I need is figure out what LAYER was clicked...
> >
> > Paul
> >
> > On Wed, May 20, 2009 at 6:43 AM, Pano Voudouris
> > <pvoudouris at gaiocorp.com>wrote:
> >
> > >  Probably don’t understand what exactly you are trying to achieve
> here
> > but
> > > it is not as simple as map.getLayer(0) to get the topmost layer? And
> > once
> > > you have the layer object use one of the query function to select
> the
> > > record? E.g.  myLayerObj.queryByPoint ?
> > >
> > >
> > >
> > > Pano
> > >
> > >
> > >
> > > *From:* mapserver-users-bounces at lists.osgeo.org [mailto:
> > > mapserver-users-bounces at lists.osgeo.org] *On Behalf Of *Paul james
> > > *Sent:* 19 May 2009 21:46
> > > *To:* mapserver-users at lists.osgeo.org
> > > *Subject:* [mapserver-users] Get the nearest layer with mapscript...
> > >
> > >
> > >
> > > Hello guys...
> > > I have several layers (lines, points, poly) ...
> > > Ím developing a measure tool... User can click on map and I have to
> > > select that layer to calculate de Area with postgis...
> > >
> > >  Ím trying to do that WITHOUT using "LAYER ACTIVE SYSTEM"...
> > >
> > >  Is That possible using mapscript? How Can I find the nearest and
> > toppest
> > > layer ?
> > >
> > > Thanks!
> > >
> > > Paul
> > >
> > > _______________________________________________
> > > mapserver-users mailing list
> > > mapserver-users at lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/mapserver-users
> > >
> > >
> >
> >
>
>
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