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Re: QUESTION using map_set to get land mask
| Re: QUESTION using map_set to get land mask [message #10361] |
Mon, 17 November 1997 00:00 |
Liam Gumley
Messages: 473
Registered: November 1994
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Senior Member |
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Katrina Hill wrote:
> My goal is to have a "mask"/"image"/"call it what you will" of a portion of
> the antarctic coastline which is created using map_set and the four corner
> coordinates of an image.
> I want this to be a invisible process which occurs when each image is
> processed (we are talking 100's here). I should point out that LOTS of other
> processing occurs by differing methods...but the mask is wanted as an input to
> my expert system for classifying AVHHR data.
Katrina,
We've had very good results using the global 1km AVHHR land/sea mask available
at
http://edcwww.cr.usgs.gov/landdaac/1KM/land_sea_mask.html
I think you'll find the coastlines are more accurate than those used in the IDL
map database.
Cheers,
Liam.
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