AW: [OpenLayers-Users] Spatial Filter Result wrong

[Arnd Wippermann]

as far as I can see from OpenLayers\Filter\Spatial.js is the filter type not
supported
 
    evaluate: function(feature) {
        var intersect = false;
        switch(this.type) {
            case OpenLayers.Filter.Spatial.BBOX:
            case OpenLayers.Filter.Spatial.INTERSECTS:
                if(feature.geometry) {
                    var geom = this.value;
                    if(this.value.CLASS_NAME == "OpenLayers.Bounds") {
                        geom = this.value.toGeometry();
                    }
                    if(feature.geometry.intersects(geom)) {
                        intersect = true;
                    }
                }
                break;
            default:
                OpenLayers.Console.error(
                    OpenLayers.i18n("filterEvaluateNotImplemented"));
                break;
        }
        return intersect;  //is false for case default
    },

Arnd

 
  _____  

Von: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von Coup Coup
Gesendet: Freitag, 17. Juni 2011 16:47
An: openlayers-users at lists.osgeo.org
Betreff: [OpenLayers-Users] Spatial Filter Result wrong


I am trying to get a client-side openlayers function that can determine if 2
geometries are within x miles of each other. First, I'm trying to develop a
prototype of said methodology using spatial filters. My end result is wrong
(false).  (there are no river crossings)

Here is the test:
fishkill = new OpenLayers.Geometry.Point(-73.903094, 41.534933);
//(Fishkill, NY 12524)
fishkill = fishkill.transform(new OpenLayers.Projection("EPSG:4326"),new
OpenLayers.Projection("EPSG:900913"));

poughkeepsie = new OpenLayers.Geometry.Point(-73.87089, 41.640904);
//( Poughkeepsie, NY 12603)
poughkeepsie = poughkeepsie.transform(new
OpenLayers.Projection("EPSG:4326"),new
OpenLayers.Projection("EPSG:900913"));
               
var tolerance = 20;
filter = new OpenLayers.Filter.Spatial({type:
OpenLayers.Filter.Spatial.DWITHIN,
                    value: poughkeepsie, distance:tolerance, distanceUnits:
'mi'})
alert('Result: ' + filter.evaluate(fishkill));


This test returns false, indicating to me that fishkill is NOT within 20
miles of poughkeepsie (this is wrong, the points are actually about 9 miles
apart.) 

Anyone see what I'm doing wrong?
	
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