Proper way to set extent 'margins'

[Ben Sims]

Hello to all,

I'm getting confused on how to correctly set 'margins' on my maps in a simple application. I currently get the extents of the dynamically generated pointsLayer using:

pointsLayer->getExtent();

I then add/subtract arbitary margin values (0.75 for x, 0.5 for y). This works well enough at the country level, but at a wider (often global) scale, the points are cut off by the edge of the image.

What I would like to do is simply extend the extent viewed by the width of the largest possible point. However, I don't know how to convert the size of the points (in pixels) to a margin usable by  $map->setExtents().

Any help much appreciated,

Benjamin

PS: Also, the Mapserver main doc site is down, which makes it hard to browse documentation.




	
	
		
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