<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<?php
include "initwebtier.php";
$code = "";
$wkt = "";
$errorMsg = "";
$status = "";
try {
echo "<b>Coordinate System API: ConvertWktToCoordinateSystemCode</b><br><br>";
$factory = new MgCoordinateSystemFactory();
$wkt = $_GET['WKT'];
$code = $factory->ConvertWktToCoordinateSystemCode($wkt);
$status = "Pass";
} catch (MgException $e) {
$errorMsg = $e->GetExceptionMessage();
$status = "Fail";
} catch (Exception $e) {
$errorMsg = $e->getMessage();
$status = "Fail";
}
echo "<b>OGC WKT:</b><br>";
echo "{$wkt}<br><br>";
echo "<b>Code:</b><br>";
echo "{$code}<br><br>";
echo "<b>Status:</b><br>";
echo "{$status}<br><br>";
if ($errorMsg != "") {
echo "<b>Error:</b><br>";
echo $errorMsg;
public static function GetFeatureClassMBR($app, $featureSrvc, $featuresId, $schemaName, $className, $geomName = null, $transformToCsCode = null)
{
$extentGeometryAgg = null;
$extentGeometrySc = null;
$extentByteReader = null;
$mbr = new stdClass();
$csFactory = new MgCoordinateSystemFactory();
$clsDef = $featureSrvc->GetClassDefinition($featuresId, $schemaName, $className);
$props = $clsDef->GetProperties();
if ($geomName == null) {
$geomName = $clsDef->GetDefaultGeometryPropertyName();
}
$geomProp = $props->GetItem($geomName);
if ($geomProp->GetPropertyType() != MgFeaturePropertyType::GeometricProperty) {
throw new Exception($app->localizer->getText("E_NOT_GEOMETRY_PROPERTY", $geomName));
}
$spatialContext = $geomProp->GetSpatialContextAssociation();
// Finds the coordinate system
$agfReaderWriter = new MgAgfReaderWriter();
$spatialcontextReader = $featureSrvc->GetSpatialContexts($featuresId, false);
while ($spatialcontextReader->ReadNext()) {
if ($spatialcontextReader->GetName() == $spatialContext) {
$mbr->coordinateSystem = $spatialcontextReader->GetCoordinateSystemWkt();
$mbr->csCode = $csFactory->ConvertWktToCoordinateSystemCode($mbr->coordinateSystem);
$mbr->epsg = $csFactory->ConvertWktToEpsgCode($mbr->coordinateSystem);
// Finds the extent
$extentByteReader = $spatialcontextReader->GetExtent();
break;
}
}
$spatialcontextReader->Close();
if ($extentByteReader != null) {
// Get the extent geometry from the spatial context
$extentGeometrySc = $agfReaderWriter->Read($extentByteReader);
}
// Try to get the extents using the selectaggregate as sometimes the spatial context
// information is not set
$aggregateOptions = new MgFeatureAggregateOptions();
$featureProp = 'SPATIALEXTENTS("' . $geomName . '")';
$aggregateOptions->AddComputedProperty('EXTENTS', $featureProp);
try {
$dataReader = $featureSrvc->SelectAggregate($featuresId, $className, $aggregateOptions);
if ($dataReader->ReadNext()) {
// Get the extents information
$byteReader = $dataReader->GetGeometry('EXTENTS');
$extentGeometryAgg = $agfReaderWriter->Read($byteReader);
}
$dataReader->Close();
} catch (MgException $e) {
if ($extentGeometryAgg == null) {
//We do have one last hope. EXTENT() is an internal MapGuide custom function that's universally supported
//as it operates against an underlying select query result. This raw-spins the reader server-side so there
//is no server -> web tier transmission overhead involved.
try {
$aggregateOptions = new MgFeatureAggregateOptions();
$aggregateOptions->AddComputedProperty("COMP_EXTENT", "EXTENT(" . $geomName . ")");
$dataReader = $featureSrvc->SelectAggregate($featuresId, $className, $aggregateOptions);
if ($dataReader->ReadNext()) {
// Get the extents information
$byteReader = $dataReader->GetGeometry('COMP_EXTENT');
$extentGeometryAgg = $agfReaderWriter->Read($byteReader);
}
$dataReader->Close();
} catch (MgException $e2) {
}
}
}
$mbr->extentGeometry = null;
// Prefer SpatialExtents() of EXTENT() result over spatial context extent
if ($extentGeometryAgg != null) {
$mbr->extentGeometry = $extentGeometryAgg;
}
if ($mbr->extentGeometry == null) {
//Stil null? Now try spatial context
if ($extentGeometrySc != null) {
$mbr->extentGeometry = $extentGeometrySc;
}
}
if ($transformToCsCode != null) {
$sourceCs = $csFactory->CreateFromCode($mbr->csCode);
$targetCs = $csFactory->CreateFromCode($transformToCsCode);
$xform = $csFactory->GetTransform($sourceCs, $targetCs);
$mbr->extentGeometry = $mbr->extentGeometry->Transform($xform);
$mbr->csCode = $targetCs->GetCsCode();
$mbr->epsg = $targetCs->GetEpsgCode();
}
return $mbr;
}
