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Re: envi_convert_file_coordinates [message #67611 is a reply to message #67527]

Tue, 04 August 2009 11:54

Jean H.
Messages: 472
Registered: July 2006

Senior Member

Hi,

I believe you are using the wrong variable... Your map is in UTM (not
too clear though) but you use it as if it was DD...

> envi_open_file, filename, r_fid=De_fid

open the file

> map_info = envi_get_map_info(fid =De_fid)

get the map info

> fxcent_p=map_info.mc[0]; UTM coordinates defined from center

you say it is in UTM

> envi_convert_file_coordinates, De_fid, xmap, ymap, fcornery_dd,
> fcornerx_dd

You use the fid of the file, so you are converting from UTM to pixel
coordinates (by the way "pixel value" refers to the content of the
pixel, not its coordinates). However, you are not using UTM coordinates
but geographic ones... So basically, you are converting coordinates that
are within 180m of the equator and from the central meridian of your UTM
zone.

Jean

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[Message index]

		envi_convert_file_coordinates By: woods1 on Mon, 03 August 2009 09:17
		Re: envi_convert_file_coordinates By: Jean H. on Tue, 04 August 2009 11:54

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