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get LAT/LON from georef image [message #65092]

Wed, 11 February 2009 02:35

titan
Messages: 59
Registered: March 2006

Member

Hello! I have a georef image and I would like to extract the LAT and
LON values from it.
the dims of my image are not equal, let's say [65,80].
I create two vectors to be associated with the x_pixel and y_pixel of
the image

x_pixel=indgen(65)
y_pixel=indgen(80)

I know that there is the envi routine ENVI_CONVERT_FILE_COORDINATES to
convert X and Y pixel coordinates into their corresponding X and Ymap
coordinates and vice-versa.

Unfortunately it seems to work only if the lat and lon array are of
the same dimension in fact if we consider this example I should write

envi_convert_file_coordinates, fid, x_pixel, y_pixel, xmap, ymap, /
to_map

in this way I should have the respective vector xmap and ymap of lat
and lon
but if I write

help, xmap
help, ymap

I get

LAT_MAP DOUBLE = Array[65]
LON_MAP DOUBLE = Array[65]

two vector of the same dims (in this case 65) and one of 65 elements
and the other with 80 elements

Could someone tell me where I'm wrong??Are there any methods to
overpass this problem??
thanks

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[Message index]

		get LAT/LON from georef image By: titan on Wed, 11 February 2009 02:35
		Re: get LAT/LON from georef image By: Jean H. on Thu, 19 February 2009 04:32

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