Developer's Guide - MapGuide Open Source - OSGeo

■ Images can be copied to the Windows clipboard and used in other
applications.
■ The Autodesk DWF Viewer is only available on Windows.
Characteristics of an eMap DWF:
■ An eMap DWF is dynamic, with all the zooming and panning capabilities
of the MapGuide DWF Viewer.
■ Because the eMap Viewer uses the map agent, the entire map is available
for smooth zooming and panning. The layer stylization rules apply.
■ The eMap requires the Autodesk DWF Viewer, either standalone or as a
plug-in for Internet Explorer.
■ The eMap requires an active MapGuide session. If the session times out
the map cannot be displayed.
■ Individual views from an eMap DWF can be saved as ePlot DWFs.
■ The Autodesk DWF Viewer is only available on Windows.
Rendering Service
The Rendering Service creates bit-mapped images of a map suitable for
displaying in a browser or saving to a file. The image is returned as an
MgByteReader object, which can be sent to a browser or saved to a file.
For example, to create a PNG image of a map area, perform the following
operations. Note that the aspect ratio of the envelope should match the image
dimensions or the image will be distorted.
$byteReader = $renderingService->RenderMap($map, $selection,
$envelope, $imageWidth, $imageHeight, $color, 'PNG');
header("Content-type: " . $byteReader->GetMimeType() );
$buffer = '';
while ($byteReader->Read($buffer, 50000) != 0)
{
echo $buffer;
}
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