[mapserver-users] Get MAP file CLASSes with no data - empty

[Lime, Steve D (DNR)]

Do you mean classes with no representation in some map draw? There's no easy way. You'd
either 1) have to hack the source and extend the classObj to track precence/absence or
2) do your drawing at the shape level and assign (and presumably track) class membership
in MapScript.

Steve

-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Michal Seidl
Sent: Saturday, December 17, 2011 3:35 PM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] Get MAP file CLASSes with no data - empty

I would like to get in PHP/Python environment the list of CLASSes which do
not target any data. The situation is like this.

1) I am interested only in vector data
2) I have mapfile and running mapserver
3) There is LAYER with many CLASSes which are defined by EXPRESSION in
mapfile

Any suggestion how get classes with no data?

Thanks Michal

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