[mapguide-users] Creating a static image problem

[Jo Cook]

Hi Chris,

In the flash of revelation that you only get *after* you've posted to the
mailing list, I realised that I couldn't use the default createmapimage.php
file from the developers sample, because it didn't include the
MgResourceIdentifier("Library://Maps/Map1.MapDefinition") anywhere. Once I
included that,  it worked just fine. All a learning experience...

Thanks

Jo

Chris Claydon wrote:
> 
> At a first glance, it looks like you may need to save the map you've
> created so that it is actually written to the session repository.
> 
> Chris.
> 
> -----Original Message-----
> From: mapguide-users-bounces at lists.osgeo.org
> [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Jo Cook
> Sent: Wednesday, August 12, 2009 9:40 AM
> To: mapguide-users at lists.osgeo.org
> Subject: [mapguide-users] Creating a static image problem
> 
> 
> Dear All,
> 
> I am trying to implement the following:
> The user selects a property (for example) from a drop-down list and is
> taken
> to a page with more details, a thumbnail map of the location, and an
> option
> to click on a link and go to the main map, where the property will be
> zoomed
> and highlighted. The setup is MGOS 2.1 with apache and php.
> 
> I have managed to implement the second part, opening the main map page,
> highlighting the property and zooming to it, with some judicious use of an
> example posted elsewhere on the forum. 
> 
> However, I'm stuck trying to implement the thumbnail image. I am using the
> property report example from the developers guide as my starting point,
> and
> using the same code that works for highlighting and zooming to create the
> selection for the rendering service. So what I want to do is send the
> parameters for the map, the scale, the coordinates etc, the selection and
> the session to the createmapimage.php file from the developers guide. That
> page fails with a resource not found error, pointing at the map resource
> (Session:19bacd00-6982-102c-8000-00142acfcbee_en_7F0000010AFC0AFB0AFA//Map1.Map).
> 
> Here's the php for the file that sends off the selection: 
> 
> $args = ($_SERVER['REQUEST_METHOD'] == 'POST') ? $_POST : $_GET;
> $mapScale = 3000;
> $imageHeight = 300;
> $imageWidth = 300;
> $SMAlayer = 'Events';
> $SMAlocation = $args['PKEY'];
> try
> {
>   if($SMAlayer && $SMAlocation) {
> 		$userInfo = new MgUserInformation("Anonymous", "");				
> 		$siteConn = new MgSiteConnection();
> 	    $siteConn->Open($userInfo);
> 	    $site = new MgSite();
> 	    $site->Open($userInfo);
> 	    $sessionId = $site->CreateSession();
> 	    $userInfo->SetMgSessionId($sessionId);
> 	    
> 	    $resourceSrvc =
> $siteConn->CreateService(MgServiceType::ResourceService);
> 	    $map = new MgMap();
> 	    $resId = new
> MgResourceIdentifier("Library://Maps/Map1.MapDefinition");
> 	    $mapName = $resId->GetName();
> 	    $map->Create($resourceSrvc, $resId, $mapName);
> 	    
> 	    $layers = $map->GetLayers();
> 	    $selLayer = $layers->GetItem($SMAlayer);
> 		$featureResourceId = new
> MgResourceIdentifier($selLayer->GetFeatureSourceId());
> 		$featureClassName = $selLayer->GetFeatureClassName();
> 	   
> 		$filter = "PKEY = $SMAlocation"; 
> 		echo $filter;
> 		$queryOptions = new MgFeatureQueryOptions(); 
> 		$queryOptions->SetFilter($filter); 
> 	   
> 	    $featureSrvc =
> $siteConn->CreateService(MgServiceType::FeatureService);
> 	    $featureReader = $featureSrvc->SelectFeatures($featureResourceId,
> $featureClassName, $queryOptions);
> 	                         
> 	    $selection = new MgSelection($map);
> 		$selection->AddFeatures($selLayer, $featureReader, 1);
> 		$selectionXml = $selection->ToXml();
> 		print_r($selectionXml);
> 		  
> 		  //get the coordinates for javascript zoom
> 		$geometryReaderWriter = new MgAgfReaderWriter();
> 		$featureReader = $featureSrvc->SelectFeatures($featureResourceId,
> $featureClassName, $queryOptions);
> 		if($featureReader->ReadNext()) {
> 			$byteReader = $featureReader->GetGeometry("Geometry");
> 			$geometry = $geometryReaderWriter->Read($byteReader); 
> 			$centerPoint = $geometry->GetCentroid();
> 			$mapCenterX = $centerPoint->GetCoordinate()->GetX();
>           $mapCenterY = $centerPoint->GetCoordinate()->GetY();
>           $sitecode = $featureReader->GetString('SITE_CODE');
>         }
>       }
> 	}
> catch (MgException $e)
> {
>   echo '<p>' . $e->GetMessage() . '</p>';
>   echo '<p>' . $e->GetDetails() . '</p>';
> }
> $selectionEncoded = urlencode($selectionXml);
> $imageUrl =
> "./devguide/custom_output/createmapimage.php?SESSION=$sessionId&SELECTION=$selectionEncoded&MAPNAME=$mapName&SCALE=$mapScale"
> .
>  
> "&HEIGHT=$imageHeight&WIDTH=$imageWidth&CENTERX=$mapCenterX&CENTERY=$mapCenterY";
> 
> ?>
> 
> This correctly picks up the scale, the coordinates, the sitecode etc. 
> 
> createmapimage.php is un-modified from the base setup. 
> 
> I'm very new to this, so I'm stuck trying to figure out what is wrong with
> what I'm sending to createmapimage.php. If someone could help, I'd be very
> grateful!
> 
> Thanks
> 
> Jo
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