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ROI's and geographical data! [message #35269]

Thu, 05 June 2003 07:53

einare
Messages: 1
Registered: June 2003

Junior Member

Hi.

I've been usind IDL now for a whole two weeks now!

My problem is that i have two data sets. One defining a ROI (in
latitude-longitude)
and another one evenly, but broadly spaced data set, combined of
lat-lon-value.

I've defined the ROI and i want a simple, non gui, procedure of
picking all the values which are inside the ROI. And because they are
broadly spaced I used the rebin function to narrow it down, making
huge data sets.

The only solution I see is making a loop testing each point, something
like:

IF roi->ContainsPoints(lon_fin[j], lat_fin[j]) GT 0 THEN BEGIN
dat_end[i]=dat_exp[j]
lon_end[i]=lon_fin[j]
lat_end[i]=lat_fin[j]
i = i+1
ENDIF

wich is not very good inside a loop with huge data sets.

I would be verry happy if somone has solved, or can solve, this
problem for me!!

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[Message index]

		ROI's and geographical data! By: einare on Thu, 05 June 2003 07:53
		Re: ROI's and geographical data! By: David Fanning on Thu, 05 June 2003 08:08

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