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I am new with ENVI IDL,I want to get pixel value of each band in an image in specified lat and long location.I can do a loop among bands in image using this code

ENVI_OPEN_FILE,'E:\MASTER\Payan_Name\DataSer\Output\162\0730\1-1Georefrence_BIP\Subset_BIP.hdr', R_FID=FID, NO_REALIZE=1
ENVI_FILE_QUERY, FID, ns=ns, nl=nl, nb=nb, data_type=data_type, descrip=descrip, bnames=bnames, sensor_type=sensor_type, wavelength_units=wavelength_units, dims=dims

for b=0,nb-1,1 do begin
  indata = ENVI_GET_DATA(FID=fid,POS=b,DIMS=dims)
endfor

But I don't know how to get pixel value at lat and long,I searched and found a library which name is Rdpix is used to get pixel value at mouse location but I want it at specified lat and long location, Can Some one please help me find the solution or give me some clues to solve my problem?

2

If you have the license, ENVI_CONVERT_FILE_COORDINATES is the right function to solve your issue. You can reference this website.

| improve this answer | |
  • thank you for your help.This gunction converts Xy to map cordinates..How can I get the pixel value? – Majid Hojati Nov 16 '14 at 14:27
  • first, get the x and y, and then indata[x,y] is the pixel value. – JZH Nov 17 '14 at 8:19

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