Chip,
Hmmm, I wonder if MapServer could do it with a projection setting. I
have no idea what the projection would be, but the hard part would be
picking a base point automatically for each center of every polygon,
possibly a Centroid. Don't know if this is possible.
Just a thought. If you were trying to build a popout button for each
state for example, you could use a sherical projection and make every
state look like it's popping out from the center of the screen. Hmmm,
I'll have to look at that sometime.
I do know that I could write something in AutoCAD Map to do this. You
would end up with either a lot of overlapping Polygons in a single SHP
file, or a seperate SHP file for each State with the new Polygon in it.
bobb
Marc Jacquin wrote:
Chip,
An easy way for doing this is to store your polygons in PostGis - use
shp2psql - (now packaged with PostGreSQL), and use the buffer function =
in
PostGis. You may then use PostGis instead of shapefiles or export it =
into
shapefile again with pgsql2shp.
Another one is to use the various version of Java Topolgy Suite, GEOS in
C++, NetTopologySuite in C#.
Marc=20
-----Message d'origine-----
De=A0: UMN MapServer Users List [mailto:[EMAIL PROTECTED] =
De la
part de Chip Taylor
Envoy=E9=A0: mardi 28 f=E9vrier 2006 14:35
=C0=A0: [email protected]
Objet=A0: [UMN_MAPSERVER-USERS] Expanding a polygon
I need a tool that can take a shape file with a polygon, such as a state
boundary, and expand it x amount in all directions. For example, take a
shapefile of the boundary of the State of Tennessee and expand the =
polygon
.5 degrees in all directions. Anyone know of such a tool?
Chip Taylor
