[Mapserver-users] Nearly there! "Inline shapes" Was: Unique? Was: mapscript - queryByPoint help, simple Q

[poff]

Hello,

Thanks again - but I get the result to be -1 this time.

I'm getting the same as my last post:

[shapeindex] => -1 [tileindex] => -1 [classindex] => 0

LAYER
	NAME "uLayer"
	STATUS ON
	TYPE POINT
	TEMPLATE "dummy"
	CLASS
		NAME "User Marker"
		SYMBOL "marker"
	END
END

	$line = ms_newLineObj();
	$line->add($oPoint);
	$shp=ms_newShapeObj(MS_SHAPE_POINT);
      	$shp->add($line);
      	$shp->{text}="hll";
      	$shp->{index}=99;
      	$uLayer->addFeature($shp);


	$uLayer->queryByPoint($my_point, MS_SINGLE, 20);

	//$uLayer->getNumResults() = 1 

	$results = $uLayer->{resultcache};

	// above is empty, returns -1 for:

	$rslt = $uLayer->getResult(0);
	$database_id = $rslt->{shapeindex};

Many thanks,

P

On Fri, Aug 29, 2003 at 01:39:09PM +0000, Eric Bridger wrote:
> 
> You don't have a shapefile for this layer. You created the layer from a
> database of points. You get the shapeindex from the results in the
> resultcache.
> 
> So all you should need to do is: (once again in perl but easily adpated
> to PHP.
> 
> if($uLayer->queryByPoint($map,$click_pt,$mapscript::MS_SINGLE,0) ==
> MS_SUCCESS){
>  	my $results = $uLayer->{resultcache};
>  	# we only expect one result.
>  	my $rslt = $uLayer->getResult(0);
> 	my $database_id = $rslt->{shapeindex};
> }
> 
> On Fri, 2003-08-29 at 16:51, poff wrote:
> > Hello All,
> > 
> > Thanks for your help, I've been making progress!
> > 
> > Basically I now get results with queryByPoint, it's getting at them which 
> > is puzzling me (different question now).
> > 
> > I have a layer with points drawn from a database, such as:
> > 
> > 	$line = ms_newLineObj();
> >       	$line->add($oPoint);
> >       	$shp=ms_newShapeObj(MS_SHAPE_POINT);
> >       	$shp->add($line);
> >       	$shp->{text}="hll";
> >       	$shp->{index}="99";
> >       	$uLayer->addFeature($shp);
> > 
> > The ulayer has no data, just a symbol for each point.
> > 
> > Now I have a problem when I get the shapefile back from the results:
> > 
> > 	$uLayer->open($map->shapepath);
> > 	
> > 	$oRes=$uLayer->getResult(0);
> > 
> > 	// this next bit gives an error
> > 
> > 	$oShape = $uLayer->getShape($oRes->tileindex,$oRes->shapeindex);
> > 
> > "Error in msLayerGetShape(): Cannot retrieve inline shapes randomly."
> > 
> > However if I use another layer, the layer with all the shapedata, I get a 
> > lovely array with all the shapefile data, built into the shapefile. 
> > Corresponding to the click.
> > 
> > If I do 
> > addFeature($shp) to the main layer, it gives me the same error. It seems 
> > whatever layer I addFeature to it gives the error.
> > 
> > Only, I need to get at the $shp data above (I really need the $shp->{index} 
> > part to get back the data from the database);
> > 
> > Do you have any ideas?
> > 
> > It's so close! I can almost taste that index ;)
> > 
> > Again a BIG thank you for helping me so far.
> > 
> > P
> > 
> > On Fri, Aug 29, 2003 at 
> > 09:50:10AM +0000, Eric Bridger wrote:
> > > Sorry you're having so much trouble. I do perl mapscript queryByPoint
> > > extensively.  Have you tried looking att the GMap PHP demo php source?
> > > It will show you how to do everything with PHP mapscript.
> > > 
> > > http://www2.dmsolutions.ca/gmap/gmap75.phtml
> > > 
> > > E.g the following code is wrong:
> > > 
> > > > $my_point = ms_newpointObj();
> > > > $my_point->setXY($_REQUEST["mapa_x"],$_REQUEST["mapa_y"]
> > > 
> > > $_REQUEST["mapa_x"] and "mapa_y" are the pixel coordinates of your mouse
> > > click. You need to first transform them to geographic coordinates.  The
> > > gmap75.php file contains a function: GMapPix2Geo() which does this.
> > > 
> > > Here's a perl example:
> > > sub get_click {
> > >     my ($q, $map) = @_;
> > >     my @current_extent = ();
> > >     my($x_map, $y_map) = (0,0);
> > > 
> > >     if($q->param('img.x') && $q->param('imgext')) { # Make sure we got a
> > > click
> > >         @current_extent = split(' ', $q->param('imgext'));
> > >         my $click_x = $q->param('img.x');
> > >         my $click_y = $q->param('img.y');
> > >         my $x_pct = ($click_x / $map->{width});
> > >         my $y_pct = 1 - ($click_y / $map->{height});
> > > 
> > >         $x_map = $current_extent[0] + ( ($current_extent[2] -
> > > $current_extent[0]) * $x_pct);
> > >         $y_map = $current_extent[1] + ( ($current_extent[3] -
> > > $current_extent[1]) * $y_pct);
> > >     }
> > >     return ($x_map, $y_map);
> > > }
> > > 
> > > 
> > > 
> > > On Fri, 2003-08-29 at 12:08, poff wrote:
> > > > Hello
> > > > 
> > > > I know everyone is busy - and thanks a lot for your help.
> > > > 
> > > > Only, does _no-one_ use querbypoint with php mapscript?
> > > > 
> > > > It's a great feature if I could get it working, and definitely something to 
> > > > go in Wiki someday!
> > > > 
> > > > Thanks
> > > > 
> > > > P
> > >  
> > > > 
> > > 
> > > 
> > > _______________________________________________
> > > Mapserver-users mailing list
> > > Mapserver-users at lists.gis.umn.edu
> > > http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> > 
> > -- 
> > poff at sixbit.org
> > SDF Public Access UNIX System - http://sdf.lonestar.org
> > 
> > Please do not carbon copy replies to me
> > _______________________________________________
> > Mapserver-users mailing list
> > Mapserver-users at lists.gis.umn.edu
> > http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> > 
> 

-- 
poff at sixbit.org
SDF Public Access UNIX System - http://sdf.lonestar.org