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Re: trying to find land/water coverage maps for NA [message #71241]

Thu, 03 June 2010 14:05

rogass
Messages: 200
Registered: April 2008

Senior Member

On 3 Jun., 04:08, nata <bernat.puigdomen...@gmail.com> wrote:
> Hi guys,
>
> This week I started working with digital elevation maps (GTOPO30) fromhttp://eros.usgs.gov/#/Find_Data/Products_and_Data_Avail able/gtopo30_....
>
> After reading the files I can draw the topography using the Wikipedia
> topography palette:http://soliton.vm.bytemark.co.uk/pub/cpt-city/wkp/te mplate/tn/wiki-2....
>
> The problem I have right now is that I can't recognise the lakes and
> the rivers because I don't know the land/water coverage.http://eros.usgs.gov/
> provides HYDRO1k data; Compound Topographic Indexs, Slope, Flow
> direction, etc. From these data I can't retrieve the lat/lon pixels
> containing water so I don't know how to go on...
>
> Does anyone know where I can find data for land or water coverage ? I
> just want to draw the topography in a good way. For North America will
> be OK.
>
> Thank you in advance,
> Bernat

You can also use the CIA Worldmap which is included in the ENVI sample
data (as far as i know) and which will help you to separate water
bodies from land surface.

Regards
CR

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		Re: trying to find land/water coverage maps for NA By: rogass on Thu, 03 June 2010 14:05
		Re: trying to find land/water coverage maps for NA By: David Fanning on Wed, 02 June 2010 19:59

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