[mapguide-users] SetSpatialFilter and MgFeatureSpatialOperations problem with search

[Maciej Skorczewski]

Hi

my problem is with "SetSpatialFilter" , in my application user click on 
PARCEL (on map) , and after click on "get REGION name" application 
should try to search in which REGION (biger surface) is the PARCEL.


what i want to get is:

help image :)
http://img171.imageshack.us/img171/8450/51030812fq1.png

so when user click on small parcel (in grey REGION), first pictures he 
should get ID of big grey REGION.

i you see on second image if parcel is nearly yellow REGION user should 
  get ID ONLY  grey  region ....


I try use all method like:

MgFeatureSpatialOperations::Intersects

it is work but i get all REGION who Intersects my parcel (yellow and 
grey  region ), after try another MgFeatureSpatialOperations like:

MgFeatureSpatialOperations::Contains = 0
MgFeatureSpatialOperations::CoveredBy = 8
MgFeatureSpatialOperations::Crosses = 1
MgFeatureSpatialOperations::Disjoint = 2
MgFeatureSpatialOperations::EnvelopeIntersects = 10
MgFeatureSpatialOperations::Equals = 3
MgFeatureSpatialOperations::Inside = 9
MgFeatureSpatialOperations::Intersects = 4
MgFeatureSpatialOperations::Overlaps = 5
MgFeatureSpatialOperations::Touches = 6
MgFeatureSpatialOperations::Within = 7


but get wrong/or none results

That is may procedure
1. user click on map
2. he press button "REGION info"
3. application use Getselection method to get selected parcel info: 
ID,NAME, and x,y Coordinates
4. I create new polygon (Coordinates come from selected parcel)
5. i use SetSpatialFilter and by iteration on all map layer i  check
what layer is in selected polygon range (REGION).



//------------my code
$selectedFeatures2=array(); //REGION ID,NAME etc.
//$coords -- come from selected parcel (GetCoordinates())

//generate new polygon from selected parcel
$linearRing = $geometryFactory->CreateLinearRing($coords);
$parcel_polygon = $geometryFactory->CreatePolygon($linearRing, null);
$resourceService=$siteConnection->CreateService(MgServiceType::ResourceService);


///--------BEGIN layer iteration...on all map layer


$layer = $map->GetLayers()->GetItem($layer_name[$i]);
$resId = new MgResourceIdentifier($layer->GetFeatureSourceId());
$featureGeometry = $layer->GetFeatureGeometryName();
$featureClass = $layer->GetFeatureClassName();
$schemaAndClass = explode(":", $featureClass);
$featureService 
=$siteConnection->CreateService(MgServiceType::FeatureService);
$queryOptions = new MgFeatureQueryOptions();
$queryOptions->SetSpatialFilter($featureGeometry,
$polygon,MgFeatureSpatialOperations::Intersects);


$featureReader = $featureService->SelectFeatures($resId, 
$layer->GetFeatureClassName(), $queryOptions);
                 while ($featureReader->ReadNext())
                 { 
$selectedFeatures2[]=array("layer_name"=>$featureReader->GetString('Layer'),"FeatureId"=>$featureReader->GetInt32('FeatureId'));
                 }



///--------END layer iteration...on all map layer








Can you pleas give me some sample code for this?





macieksk