[GRASSLIST:3368] Re: landsat5_bsq
werchowyna at pf.pl
Thu May 6 17:54:41 EDT 2004
From: "Glynn Clements" <glynn.clements at virgin.net>
> > UPPER_LEFT_CORNER=0141500.0042E,0511547.6328N,447671.547,5679365.027;
> > UPPER_RIGHT_CORNER=0165706.5136E,0505151.0288N,637351.781,5636535.711;
> > LOWER_RIGHT_CORNER=0162013.7030E,0491632.8889N,597259.322,5458976.331;
> > LOWER_LEFT_CORNER=0134309.6950E,0493942.1275N,407579.088,5501805.647;
> This data isn't aligned to any known coordinate system, so you can't
> just import it directly. You would need to use e.g. i.rectify to
> transform it to the desired coordinate system.
I'm not sure what you mean. They are somewhat "projected".
I mean I know the corners coordinates.
UPPER_LEFT_CORNER is 14d15'00.0042"E 51d15'47.6328"N which is 447671.547E
5679365.027N meters in the UTM, zone 33, WGS84
And so forth.
As you said I rectified the raster myself (using coords as above).
I get results close to reality but there is a shift of about 1 km beetwen
the rectified raster and an other TM of the same area - a geotiff which I
believe to be pretty well projected (verified with a topo map).
Also the resolution of the rectified raster is different than the "28.5
meters" stated in the *.HD file.
Do you have a clue what may be the reason?
What "order of transformation" should I use for the i.rectify?
How do you think: which points in the raster the coords listed above refer
to? - the black border corners or the "beginnings of the picture" itself?
(the thumbnail attached)
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 9133 bytes
Desc: not available
Url : http://lists.osgeo.org/pipermail/grass-user/attachments/20040506/dac5467c/LT5191025008419310.preview.jpg
More information about the grass-user