Thanks for your responses,
I realize that I don't need a GIS such as Grass which is like other GIS a
system intended for geographic database users, not for map users.
I need a map server, and so I think that MapServer is a better solution for
my needs
----- Original Message -----
From: "Hamish" <[email protected]>
To: "Jérôme - GeoRezo.net" <[email protected]>; "Vincent Bain"
<[email protected]>
Cc: <[email protected]>
Sent: Thursday, April 16, 2009 9:39 AM
Subject: Re: [GRASS-user] Rotate a map display
Vincent wrote:
If you need to warp a map for a strict display purpose, IMHO it's
not to be performed from within grass given that this operation
makes no sense "geographically".
I agree,
Don't know what the context is, but if you just have to rotate an
image output of a map maybe you'd better look towards image
manipulation tools (e.g. imagemagick and the -rotate option, which
can easily be integrated in a script process).
pnmrotate is another that I've used with d.out.gpsdrive and GpsDrive's
gdal_slice.sh script, together with 'g.region -n' to get the convergence
angle. (angle between local projection north vs true north)
render map with PNG driver in GRASS, read course-over-ground from Gpsd
(gpsd.berlios.de) in watcher mode, pnmrotate and pnmcrop, and then use
an image viewer which will update the display when the image changes.
(see grass 7 discussions about that).
Hamish
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
