Developer's Guide - MapGuide Open Source - OSGeo

Get the features from the feature source,
// determine the centroid of each selected feature, and
// add a point to the ParcelMarker layer to mark the
// centroid.
// Collect all the points into an MgFeatureCommandCollection,
// so they can all be added in one operation.
$featureResId = new MgResourceIdentifier(
"Library://Samples/Sheboygan/Data/Parcels.FeatureSource");
$featureReader = $featureService->SelectFeatures($featureResId,
"Parcels", $queryOptions);
$parcelMarkerCommands = new MgFeatureCommandCollection();
while ($featureReader->ReadNext())
{
$byteReader = $featureReader->GetGeometry('SHPGEOM');
$geometry = $agfReaderWriter->Read($byteReader);
$point = $geometry->GetCentroid();
// Create an insert command for this parcel.
$properties = new MgPropertyCollection();
$properties->Add(new MgGeometryProperty('ParcelLocation',
$agfReaderWriter->Write($point)));
$parcelMarkerCommands->Add(
new MgInsertFeatures('ParcelMarkerClass', $properties));
}
$featureReader->Close();
if ($parcelMarkerCommands->GetCount() > 0)
{
$featureService->UpdateFeatures($parcelFeatureResId,
$parcelMarkerCommands, false);
}
else
{
echo 'No parcels within the buffer area match.';
}
88 | Chapter 5 Analyzing Features