[Mapserver-users] mask

[Ed McNierney]

Folks -

I think John's point is that he'd like to create a layer in which
everything OUTSIDE the polygons is filled, rather than their interiors.
I am not aware of a way to do this in MapServer; I have always modified
my input data to create a single large, complex, polygon with holes
punched in it.  This will work just fine in MapServer.

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: (978) 251-4242  Fax: (978) 251-1396
ed at topozone.com


-----Original Message-----
From: Lowell Filak [mailto:lfilak at medinaco.org] 
Sent: Monday, March 17, 2003 9:43 AM
To: John Hagstrand; mapserver-users at lists.gis.umn.edu
Subject: Re: [Mapserver-users] mask

Yes, you can draw the political boundaries first (say in yellow) and
then draw the oceans (in say blue) on top and it will mask the
underlying boundaries.
The exception to that is if you use the TRANSPARENCY option in a given
layer.
HTH
Lowell F.

The following message was sent by John Hagstrand
<john.hagstrand at interageresearch.com> on Sun, 16 Mar 2003 18:09:26
-0600.

> Hi,
> 
> Does MapServer have the concept of masking?  I want to mask one layer
with 
> another.
> 
> Specifically, I have world map vector data, with land mass polygons in
one 
> layer, and political boundaries in another layer.  The political
polygons 
> need to be masked by the land mass polygons so they don't extend out
into 
> the oceans.  I hope I've been clear.
> 
> Thanks
> John
> 
> -------------------------------------------------
> John Hagstrand
> Interage Research, Inc.
> 847 838 5371
> Software Development Consulting for Internet Content Management
> We make knowledge accessible, useful, and relevant for everyone.
> http://www.interageresearch.com
> 
> 
> _______________________________________________
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