[mapserver-users] Aligning labels within a polygon

[Fawcett, David (MPCA)]

If you are storing the data in PostGIS, you could possibly take advantage of ST_Azimuth().  http://www.postgis.org/docs/ST_Azimuth.html

It takes two point objects as the args, but you could potentially use the start and end points of your linestring.

David.

From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Jan Hartmann
Sent: Tuesday, February 21, 2012 10:23 AM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] Aligning labels within a polygon

Hi,

I'm inputting lots of street address points in PostGIS, and try to generate labels for the streets. The convex hull of the points of a street approximate the course of the street, and I would like to position the streetname in the middle of the convex hull polygon, aligned to its dominant angle (the polygons are generally quite narrow). Is there a way of doing this with MapServer? Perhaps by thinning out the polygon to a line, for then I can use "angle follow".

Jan
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