Hi,
maybe my previous message was a bit vague. I'll try to explain my
problem more accurately.
I have a georeferenced image with a road in high resolution (0.5m). And
I have a vector road in KML-file made with Google Earth.
There is exact match between vector road and raster road in Google Earth.
I have even made a test in QuantumGIS: I added there the image and
KML-file and got the same result - vector road is on raster road.
But when I place vector road on a VPB terrain, the road is shifted to
the west.
There is two logical explanations:
1) Error with the texture in VPB or OSG
2) Error in osg::EllipsoidModel
This is gdalinfo for my image:
Driver: GTiff/GeoTIFF
Files: GeoEye_fus_50sm.tif
Size is 39877, 25458
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.2572235629972,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Origin = (160.053108789177884,54.496583902721099)
Pixel Size = (0.000006107432741,-0.000006107432741)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 160.0531088, 54.4965839) (160d 3'11.19"E, 54d29'47.70"N)
Lower Left ( 160.0531088, 54.3411009) (160d 3'11.19"E, 54d20'27.96"N)
Upper Right ( 160.2966549, 54.4965839) (160d17'47.96"E, 54d29'47.70"N)
Lower Right ( 160.2966549, 54.3411009) (160d17'47.96"E, 54d20'27.96"N)
Center ( 160.1748818, 54.4188424) (160d10'29.57"E, 54d25'7.83"N)
Band 1 Block=39877x1 Type=Byte, ColorInterp=Red
Overviews: 19939x12729, 9970x6365, 4985x3183, 2493x1592, 1247x796
Band 2 Block=39877x1 Type=Byte, ColorInterp=Green
Overviews: 19939x12729, 9970x6365, 4985x3183, 2493x1592, 1247x796
Band 3 Block=39877x1 Type=Byte, ColorInterp=Blue
Overviews: 19939x12729, 9970x6365, 4985x3183, 2493x1592, 1247x796
Regards,
Alexander
07.08.2010 13:23, Александр Бобков пишет:
Hi,
I have a georeferenced image with resolution 0.5m. This image was
added to Google Earth Pro and there was created several paths and
marks. This is screenshot from Google Earth with a path:
http://img155.imageshack.us/i/googleearth.jpg/
Then I created a VPB terrain with the same image. I exported paths
from Google Earth to KML file, got geocoordinates and placed them on
the VPB terrain. Here is screenshot from the VPB terrain:
http://img175.imageshack.us/i/openscenegraph.png/
As you can see, there is a small constant shift to the west.
Approximately 1m. How can I fix this shift? What is the reason for it?
I use osg::EllipsoidModel to convert coordinates. Coordinates in KML
file have a very high precision. For example: 160.1361826749267,
54.43656637255538, 0
Regards,
Alexander
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