Hi Shayne,
Hi Glenn,
Thanks for ur kind replies..
Shayne,
As you know MyTerrain.tif file projection info was;
Geographic ( Latitude / Longitude )
[N:36, E128] [N:38, E130] is in Utm Zone 52
Datum : WGS84
Unit : Arc degrees.
i tried to reproject MyTerrain.tif file using ur gdalwarp command like
Hi Glenn,
i have reprojected MyTerrainImage.tif from GCS ( Geographic coordinate system )
to UTM using GlobalMapper successfully,
Should i re-project Dted-2 Elevation files to UTM projection as well?
İf so;
Should i use osgdem command like this;
osgdem --cs +proj=utm +zone=52 -d MyDteds -
Hi,
i have tried to generate a terrain (.ive) database using osgdem commandline
options in order to buid a flat database where coordinates are in meters. After
successfull generation i put that terrain in my osg application and really
shocked! Before telling you what i saw as the output let me
Hi,
i have tried to generate a terrain (.ive) database using osgdem commandline
options in order to buid a flat database where coordinates are in meters. After
successfull generation i put that terrain in my osg application and really
shocked! Before telling you what i saw as the output let me
Atilla,
osgdem is creating your model in what's called a plate carre projection --
in which degrees are simply reinterpreted as meters. That is why your 2x2
degree cell is appearing as 2x2 meters.
You need to reproject into a proper projected spatial reference system (like
UTM) to get the correct
Hi Glenn,
Thanks for the tip.. but i really need to know,
Where should i do reprojection? In my dted-2 files and/or in my GeoTiff.file
(since their projections are both Geographic - Lat/Lon) before executing osgdem?
Or should i do re-scaling or whatever after i load terrain in osg application?
I recommend reprojecting them first. You can use gdalwarp, or a tool like
Global Mapper.
You may also want to investigate osgEarth as an alternative approach to
doing terrain with OSG.
Glenn Waldron / Pelican Mapping / @glennwaldron
On Thu, May 5, 2011 at 1:08 PM, Atilla Selem
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