Hello all,
I am new to grass and am seeking advice on organising/compiling some
data sets. For my research project I have a set of (22 to be precise)
orthophotos and DEM. The orthos covering a portion of a city are at
50cm resolution. Each tile is about 25-35 Megs in size. The Orthos are
in BIL format. I have imported them in to Grass (grass 5.0beta7) and am
contemplating making a mosaic of all the tiles and resample them to say
10 meter resolution. The ultimate aim is to drape vectors (proposed
landuse zones) on these orthos which in turn is to be draped on a
perspective/3D using the DEM.
In short I have 22 high resolution ortho photos that cover my study
area. DEM of the sudy area as one map. Vectors (about 25 layers) as one
map covering the study area.
To begin with, to achive the above objective, is it necessary to have a
mosaic of orthos ? or would it be possible to drape individual tiles
over one largerDEM.
Also I am having problems compiling the NVIZ module (RH 6.2 on Intel). I
keep getting the following error message.
.................................
gstypes.h:8: GL/gl.h: No such file or directory
GS.c:23: GL/gl.h No such file or directory
make[1]: *** [OBJ.i686-linux-elf/GS.o] Error 1
make[1]: Leavng directory 'hari/grass5.0beta/src/libes/ogsf'
make: *** [nwish] Error 2
.....................................
Any strategies/ suggestions will be greatly appreciated.
cheers
Hari Kishore
On Fri, Jun 02, 2000 at 12:36:12AM +0930, Hari Kishore wrote:
Hello all,
I am new to grass and am seeking advice on organising/compiling some
data sets. For my research project I have a set of (22 to be precise)
orthophotos and DEM. The orthos covering a portion of a city are at
50cm resolution. Each tile is about 25-35 Megs in size. The Orthos are
in BIL format. I have imported them in to Grass (grass 5.0beta7) and am
contemplating making a mosaic of all the tiles and resample them to say
10 meter resolution. The ultimate aim is to drape vectors (proposed
landuse zones) on these orthos which in turn is to be draped on a
perspective/3D using the DEM.
In short I have 22 high resolution ortho photos that cover my study
area. DEM of the sudy area as one map. Vectors (about 25 layers) as one
map covering the study area.
To begin with, to achive the above objective, is it necessary to have a
mosaic of orthos ? or would it be possible to drape individual tiles
over one largerDEM.
Which ever you find easier... In the latter case, make sure you have
NULL's defined properly. d.rast -o <raster> will overlay and not draw
the NULL's as white. Don't know how good the orthophotos will look
draped over a DEM.
Also I am having problems compiling the NVIZ module (RH 6.2 on Intel). I
keep getting the following error message.
.................................
gstypes.h:8: GL/gl.h: No such file or directory
GS.c:23: GL/gl.h No such file or directory
make[1]: *** [OBJ.i686-linux-elf/GS.o] Error 1
make[1]: Leavng directory 'hari/grass5.0beta/src/libes/ogsf'
make: *** [nwish] Error 2
.....................................
Presumably you don't have Mesa3.0 installed (OpenGL clone).
d3d may be better for the orthophotos than NVIZ. NVIZ does a fair bit
of interpolation to speed rendering, at the cost of detail.
--
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» ing·email·messages.
On Fri, Jun 02, 2000 at 07:47:42PM -0700, Eric G . Miller wrote:
On Fri, Jun 02, 2000 at 12:36:12AM +0930, Hari Kishore wrote:
> Also I am having problems compiling the NVIZ module (RH 6.2 on Intel). I
> keep getting the following error message.
> gstypes.h:8: GL/gl.h: No such file or directory
> GS.c:23: GL/gl.h No such file or directory
Presumably you don't have Mesa3.0 installed (OpenGL clone).
There is a chance that you need a development mesa rpm installed.
Let me remind everybody that there are binaries of GRASS available.
http://www.geog.uni-hannover.de/grass/acquire.html
is the general URL for getting GRASS in different versions.
At least the FreeGIS CD rpm contains grass5.0beta6 and a running nviz
for GNU/Linux/i586.
Intevation GmbH is also looking for people to mirror the CD.
Bernhard
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