function MultiGeometryFromSelection($featureSrvc, $map, $selText)
{
$sel = new MgSelection($map, $selText);
$selLayers = $sel->GetLayers();
$geomColl = new MgGeometryCollection();
$agfRW = new MgAgfReaderWriter();
$simplyPolygonOnly = true;
for ($i = 0; $i < $selLayers->GetCount(); $i++) {
$layer = $selLayers->GetItem($i);
$filter = $sel->GenerateFilter($layer, $layer->GetFeatureClassName());
$query = new MgFeatureQueryOptions();
$query->SetFilter($filter);
$featureSource = new MgResourceIdentifier($layer->GetFeatureSourceId());
$features = $featureSrvc->SelectFeatures($featureSource, $layer->GetFeatureClassName(), $query);
if ($features) {
$classDef = $features->GetClassDefinition();
$geomPropName = $classDef->GetDefaultGeometryPropertyName();
$j = 0;
while ($features->ReadNext()) {
$geomReader = $features->GetGeometry($geomPropName);
$geom = $agfRW->Read($geomReader);
$type = $geom->GetGeometryType();
if ($type == MgGeometryType::MultiPolygon || $type == MgGeometryType::CurvePolygon || $type == MgGeometryType::MultiCurvePolygon) {
$simplyPolygonOnly = false;
} else {
if ($type != MgGeometryType::Polygon) {
continue;
}
}
$geomColl->Add($geom);
}
}
}
if ($geomColl->GetCount() == 0) {
return null;
}
$gf = new MgGeometryFactory();
if ($simplyPolygonOnly) {
$polyColl = new MgPolygonCollection();
for ($i = 0; $i < $geomColl->GetCount(); $i++) {
$polyColl->Add($geomColl->GetItem($i));
}
return $gf->CreateMultiPolygon($polyColl);
} else {
return $gf->CreateMultiGeometry($geomColl);
}
}
$geomReader = $features->GetGeometry($geomPropName);
$geom = $agfRW->Read($geomReader);
if (!$merge) {
$geomBuffer = $geom->Buffer($dist, $measure);
if ($geomBuffer != null) {
if ($srsXform != null) {
$geomBuffer = $geomBuffer->Transform($srsXform);
}
AddFeatureToCollection($propCollection, $agfRW, $featId++, $geomBuffer);
$bufferFeatures++;
}
} else {
if ($srsXform != null) {
$geom = $geom->Transform($srsXform);
}
$inputGeometries->Add($geom);
}
} while ($features->ReadNext());
$features->Close();
}
}
if ($merge) {
if ($inputGeometries->GetCount() > 0) {
$dist = $srsMap->ConvertMetersToCoordinateSystemUnits($distance);
if (!$arbitraryMapSrs) {
$measure = $srsMap->GetMeasure();
} else {
$measure = null;
}
$geomFactory = new MgGeometryFactory();
$geomBuffer = $geomFactory->CreateMultiGeometry($inputGeometries)->Buffer($dist, $measure);
$bufferLayer->SetVisible(true);
$bufferLayer->ForceRefresh();
$bufferLayer->SetDisplayInLegend(true);
$map->Save($resourceService);
*/
// New way, post MapGuide 2.0
// Get the selected features from the MgSelection object
$featureReader = $selection->GetSelectedFeatures($layer, $layer->GetFeatureClassName(), false);
// Process each item in the MgFeatureReader. Get the
// geometries from all the selected features and
// merge them into a single geometry.
$inputGeometries = new MgGeometryCollection();
while ($featureReader->ReadNext()) {
$featureGeometryData = $featureReader->GetGeometry('SHPGEOM');
$featureGeometry = $agfReaderWriter->Read($featureGeometryData);
$inputGeometries->Add($featureGeometry);
}
$geometryFactory = new MgGeometryFactory();
$mergedGeometries = $geometryFactory->CreateMultiGeometry($inputGeometries);
// Add buffer features to the temporary feature source.
// Create multiple concentric buffers to show area.
// If the stylization for the layer draws the features
// partially transparent, the concentric rings will be
// progressively darker towards the center.
// The stylization is set in the layer template file, which
// is used in function CreateBufferLayer().
$commands = new MgFeatureCommandCollection();
for ($bufferRing = 0; $bufferRing < $bufferRingCount; $bufferRing++) {
$bufferDist = $srs->ConvertMetersToCoordinateSystemUnits($bufferRingSize * ($bufferRing + 1));
$bufferGeometry = $mergedGeometries->Buffer($bufferDist, $srsMeasure);
$properties = new MgPropertyCollection();
$agfTextPoint = $wktReaderWriter->Write($oGeom);
//echo "<!-- wkt: ".$agfTextPoint." -->\n";
if (!$merge) {
/* use measure to accomodate differences in SRS */
$oNewGeom = $oGeom->Buffer($dist, $measure);
$geomProp = new MgGeometryProperty("GEOM", $agfRW->Write($oNewGeom));
$oPropertyColl = new MgPropertyCollection();
$oPropertyColl->Add($geomProp);
$oCommandsColl->Add(new MgInsertFeatures($schemaName . ':' . $layerName, $oPropertyColl));
} else {
if ($srsXform == null) {
$oNewGeom = $oGeom;
} else {
$oNewGeom = $oGeom->Transform($srsXform);
}
$inputGeometries->Add($oNewGeom);
}
}
$featureReader->Close();
}
if ($merge) {
if ($inputGeometries->GetCount() > 0) {
$dist = $srsMap->ConvertMetersToCoordinateSystemUnits($distance);
if (!$arbitraryMapSrs) {
$verMajor = subStr(GetSiteVersion(), 0, 1);
if ($verMajor == '1') {
$measure = new MgCoordinateSystemMeasure($srsMap);
} else {
$measure = $srsMap->GetMeasure();
}
} else {
