Hi Alejandro
Im not 100% here, but I think you still need to specify some sort of
projection basis, even plain lat lon uses some defenition of the geoid like
WGS84 og similar.
Natrally it could be a problem with you GTiff file.
What version of VPB OSG are you using?
Brgs.
Ralf
2008/10/27
Hi Alejandro,
VPB is only understand well referenced WGS84 formatted data. So I advice you
to use referenced images to create your terrain, if you are not familiar
with reference data manipulation on images you should download prepared
referenced data from http://seamless.usgs.gov/index.php or
Hi Umit,
On Mon, Oct 27, 2008 at 7:36 AM, Ümit Uzun [EMAIL PROTECTED] wrote:
VPB is only understand well referenced WGS84 formatted data.
This is not correct, VPB can handle a wide range of projections,
including no projections if your manually provide the projections.
However, I would very
Hi Robert,
Thanks for clarification. But I remember that, VPB can manipulate only WGS84
referenced data. But it may be valid for only BlueMarble viewer. Sorry for
wrong comment :)
Best Regards.
Umit Uzun
2008/10/27 Robert Osfield [EMAIL PROTECTED]
Hi Umit,
On Mon, Oct 27, 2008 at 7:36 AM,
Hi Umit,
On Mon, Oct 27, 2008 at 9:25 AM, Ümit Uzun [EMAIL PROTECTED] wrote:
Thanks for clarification. But I remember that, VPB can manipulate only WGS84
referenced data. But it may be valid for only BlueMarble viewer. Sorry for
wrong comment :)
When building geocentric databases VPB
Hi Ralph,
I am using the last versions from svn. Perhaps this warning from
gdalinfo gives a hint on what is wrong with this data?
gdalinfo volcanes.tif
Warning 1: TIFFReadDirectory:volcanes.tif: Wrong StripByteCounts
field, ignoring and calculating from imagelength
because otherwise it
Hi Alejandro,
There is no coordinate systeml information for VPB to go on, and empty
string for the coordinate system is not sufficient for determining the
coordinate system, the origin and pixel size info aren't sufficient
on their own.
Robert.
On Mon, Oct 27, 2008 at 4:32 PM, Alejandro
Hi Robert and Umit,
As probably you already read it, my data is georeferenced but has no
projection info (plain latitude, l,ongitude). Using plain osgdem
produces a wrong 1 dimension field (a line).
osgdem -d volcanes.tif -l 8 -v 1.0 -o kk
I have to give some approximated --xx and --yy data
Hi Robert:
Yes but they are perfectly georeferenced. What shoud I do?
--geocentric is enough?
-- A.
On Mon, Oct 27, 2008 at 10:38 AM, Robert Osfield
[EMAIL PROTECTED] wrote:
Hi Alejandro,
There is no coordinate systeml information for VPB to go on, and empty
string for the coordinate system
Hi Alejandro,
Your data *is* the problem, please add the coordinate system info.
Using the --xx etc options really is not a good solution going
forward. Use properly set up data and things will work fine. Please
go check out the gdal website for info on how to set up your data.
As for VPB
Hi Alejandro
You can use gdalwarp to (stamp) the projection information into you data.
try using something similar to the following:
//call gdalwarp to project my data to wgs84
//This will create a virtual raster (vrt) which does not copy the data of
the original raster
//but creates a sort of
Hi Ralph,
It works, thank you very much! :)
-- A.
On Mon, Oct 27, 2008 at 1:57 PM, Ralf Stokholm [EMAIL PROTECTED] wrote:
Hi Alejandro
You can use gdalwarp to (stamp) the projection information into you data.
try using something similar to the following:
//call gdalwarp to project my
Hi Alejandro
It seams you are missing projection information in the createt geotiff file.
VPB needs some sort of projection system information in the input or you
should specify the projection in the commandline for VPB
It will be faster if you project your source data using ie gdalwarp, adal
Hi,
Actually the data has no projections, it is in plain
longitude/latitude coordinates. Which is the recomended projection for
data about 1 or two degrees long so I can have it in kilometers?
Regards,
-- A.
On Sun, Oct 26, 2008 at 2:04 AM, Ralf Stokholm [EMAIL PROTECTED] wrote:
Hi Alejandro
Hello:
I got DEM data from INEGI (Mexican Geographic Institute) and convert
it to Geo Tiff.
gdal_translate -of GTiff -co TILED=YES
MDE-n20s19e097o099.bil volcanes.tif
gdaladdo -r average volcanes.tif 2 4 8 16 32
gdalinfo volcanes.tif
Warning 1: TIFFReadDirectory:volcanes.tif:
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