enhancement to envi hdr reader - georeferencing info

[msmitherdc]

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

[msmitherdc]

example BIP hdr with georeferencing info

[warmerdam]

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.

[msmitherdc]

gdalinfo output from file

[Even Rouault]

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 ?

[msmitherdc]

Looks like the georeferencing is more complicated than I thought.

Here are the docs on it.

​http://kkrit.com/d/ENVI_4_3/online_help/Georeferencing_from_Input_Geometry.html

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

[Even Rouault]

This ticket has been automatically closed because Trac is no longer used for GDAL bug tracking, since the project has migrated to GitHub. If you believe this ticket is still valid, you may file it to ​https://github.com/OSGeo/gdal/issues if it is not already reported there.