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Re: Coastal boundaries over sat data [message #21203 is a reply to message #21199]

Thu, 17 August 2000 00:00

Lars[1]
Messages: 1
Registered: August 2000

Junior Member

Daniel Peduzzi wrote:
>
> Thanks...that is a handy program, and I've used it before in the past.
> I'm not sure that it can be used for what I want to do, though, since
> I don't want to remap the data...only display it in its *native*
> projection with coastal boundaries.
>
> In other words, if I have 1000 scanlines of DMSP data (1465 elements
> wide), and accompanying 1465x1000 lat/lon arrays, I'd like to display
> a 1465x1000 image overlaid with coastlines.
>
> Did I miss something?

I think the DMSP *native* projection is not so simple as a
standard projection (e.g. polar stereographic) due to its
conical scan geometrie.
But you could solve your problem by
I. gridding the data ;-)
or
II. take a coastline data set as (lat1,lon1) pairs and search
in the DMSP data set the (lat1,lon1) pairs with the smallest
distance d=(lat1-lat2)^2+(lon1-lon2)^2. Then you have found the
pixels, which belong to the coastline.

Regards,
Lars
-------------
www.seaice.de

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[Message index]

		Re: Coastal boundaries over sat data By: Ben Marriage on Thu, 17 August 2000 00:00
		Re: Coastal boundaries over sat data By: Dennis J. Boccippio on Thu, 17 August 2000 00:00
		Re: Coastal boundaries over sat data By: Lars[1] on Thu, 17 August 2000 00:00
		Re: Coastal boundaries over sat data By: Liam E. Gumley on Wed, 16 August 2000 00:00
		Re: Coastal boundaries over sat data By: Daniel Peduzzi on Wed, 16 August 2000 00:00
		Re: Coastal boundaries over sat data By: Paul van Delst on Wed, 16 August 2000 00:00

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