Opened 12 years ago

Closed 5 years ago

#4435 closed enhancement (wontfix)

enhancement to envi hdr reader - georeferencing info

Reported by: msmitherdc Owned by: warmerdam
Priority: normal Milestone: closed_because_of_github_migration
Component: GDAL_Raster Version: svn-trunk
Severity: normal Keywords: envi georeferencing hdr hyperspectral
Cc: antonio


We have a number of hyperspectral scenes that have georeferencing information in a header (.hdr) file in ENVI format. The Data itself is BIP and read properly by GDAL (1.9) but the georeferencing information is not.

Attached is a sample .hdr file

Attachments (2)

test.hdr (7.7 KB ) - added by msmitherdc 12 years ago.
example BIP hdr with georeferencing info
gdalinfo_test1.hsi (32.3 KB ) - added by msmitherdc 12 years ago.
gdalinfo output from file

Download all attachments as: .zip

Change History (7)

by msmitherdc, 12 years ago

Attachment: test.hdr added

example BIP hdr with georeferencing info

comment:1 by warmerdam, 12 years ago

It seems plausible to use the extents keyword to establish GCPs if nothing else is picked up for georeferencing. I am not planning to immediately take action on this.

by msmitherdc, 12 years ago

Attachment: gdalinfo_test1.hsi added

gdalinfo output from file

comment:2 by Even Rouault, 12 years ago

If the image is relatively north-up, then the order of the points in extents {} seems to be : 46.808528, -116.153852 --> Upper-Left corner 46.808926, -116.149902 --> Upper-Right corner 46.802691, -116.151028 --> Lower-Left corner 46.803066, -116.147077 --> Lower-Right corner

Is that actually correct and consistant with the imagery ? I have some doubts due to the presence of angles like roll, pitch, heading and the sensor coordinates are outside of the extent, which might be a sign that the image could have a completely different orientation. By the way, is there some doc of the format ?

comment:3 by msmitherdc, 12 years ago

Looks like the georeferencing is more complicated than I thought.

Here are the docs on it.

There is a IGM georeferencing file. I'll see if I can get some sample images with the files that I can make available.

comment:4 by antonio, 11 years ago

Cc: antonio added

comment:5 by Even Rouault, 5 years ago

Milestone: closed_because_of_github_migration
Resolution: wontfix
Status: newclosed

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