[Gdal-dev] Writing an ENVI file.

[Ken Sewell]

Frank,
	I am working off of a CVS version from 03 Aug 2005.  My input file 
is an ENVI file with the info:

ENVI
samples = 27309
lines   = 15414
bands   = 4
header offset = 0
file type = ENVI Standard
data type = 12
interleave = bsq
sensor type = Unknown
byte order = 0
map info = {UTM, 1.000, 1.000, 672230.424, 3829409.895, 6.9000000000e-001, 
6.9000000000e-001, 42, North, WGS-84, units=Meters}
wavelength units = Unknown
band names = {
 GS Sharpen (Orthorectified (MULTI (B ) MS):03JUL05QB0100026MS_P008),
 GS Sharpen (Orthorectified (MULTI (G ) MS):03JUL05QB0100026MS_P008),
 GS Sharpen (Orthorectified (MULTI (R ) MS):03JUL05QB0100026MS_P008),
 GS Sharpen (Orthorectified (MULTI (N ) MS):03JUL05QB0100026MS_P008)}


After running it through gdalwarp with -t_srs EPSG:4326


ENVI
samples = 28018
lines   = 10180
bands   = 4
header offset = 0
file type = ENVI Standard
data type = 1
interleave = bsq
byte order = 0



Ken Sewell                   Defense Research Associates
Project Engineer             3915 Germany Lane, Suite 102
937-656-4899 x3004           Beavercreek, Ohio 45431-1608
sewell at dramail.com

On Fri, 5 Aug 2005, Frank Warmerdam wrote:

> On 8/5/05, Ken Sewell <sewell at dramail.com> wrote:
> > 
> > A co-worker is trying to use gdalwarp to warp an ENVI file into a new
> > projection.  It seems to work, but when we examine the header file it
> > seems to have lost all geotransform and coordinate system info.  From
> > searching the mailing list archives, I found that writing to envi is not
> > complete, but should at least output the coord/geo information.  Is there
> > a gotcha we need to know about?
> 
> Ken,
> 
> It looks like Lichun Wang (ITC) did a significant overhaul of the
> header writing for ENVI format very shortly after 1.2.6 release.   Are
> you using 1.2.6 or GDAL CVS?  I would encourage you to try a
> nightly snapshot if you are currently using 1.2.6.
> 
> Looking at the code, it seems it should always write out the
> geotransform information as a mapinfo line, even if the coordinate
> system is not known.  What does the generated header file look like?
> 
> Best regards,
> -- 
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Programmer for Rent
>