For a project I'm currently working on, we're creating a density layer on a mapfile. The same thing was once attempted by Bill Binko and his work is currently being used as inspiration. <br><br>What we'd like to do is make a map containing (from bottom to top):
<br><br>a raster layer<br>a semi transparent layer we calculate ourselves<br>a feature layer<br><br>The problem we encounter is how to combine the mapserver layers with the layer we calculate in PHP. We're planning to calculate the layer using php functions and then using php's image functions to create an overlay image. This will give us a GD image in memory. What we can do, and Bill has already done so, is to save the mapserver generated layers to the file system and then reopening them using php's image functions and using php's image functions to stack them onto each other and create a final image the client can use.
<br><br>The problem with this solution is that it's hardly elegant and requires quite a bit of disk I/O that really isn't necessary and is therefore quite slow. Is there some way we can use the imageObj in mapscript to paste the in-memory calculated php GD image onto? Another solution would be to allow imageObjs to be transformed into php image objects. Is there a way to do such a thing?
<br><br>Any help will be greatly appreciated<br clear="all"><br>-- <br>Martin van Dijken<br>Senior ontwikkelaar / Technisch projectleider<br> <br>M +31 (0)6 26 144 223<br>E <a href="mailto:martin@van-dijken.eu">martin@van-dijken.eu
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