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Today's Topics:
1. highest and lowest point in catchment (Dr. Manuel Seeger)
2. SHELL Variable problem: Workaround (Peter L?we)
3. Re: SHELL variable not set (Martin Wegmann)
4. Re: SHELL variable not set (Glynn Clements)
5. Re: SHELL variable not set (Hamish)
6. Re: SHELL variable not set (Markus Neteler)
7. Re: Building wxgrass vdigit (Martin Landa)
8. segment_format error with r.watershed (Wes Kent)
9. union features of vector (Alfredo Alessandrini)
10. Re: Snap across layers (Martin Landa)
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Message: 1
Date: Tue, 29 Jan 2008 10:01:20 +0100
From: "Dr. Manuel Seeger" <[EMAIL PROTECTED]>
Subject: [GRASS-user] highest and lowest point in catchment
To: GRASSLIST <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Hello all,
I hope the questions does not seem too simple, but I have now no real
good idea how to solve this simple problem:
I need to find the highest and the lowest point within catchments WITH
their coordinates (and to get the information about altitude and
coordinates, of course)
thanks for hints!
manuel
Manuel - hope I'm not being silly here, but I'd consider just using an
SQL select directly to the data store.
Select max( <altitude column> ), <latitude column>, <longitude column>,
<any other column you want> from <table> where <boundary conditions of
catchment>
Select min( <altitude column> ), <latitude column>, <longitude column>
<any other column you want> from <table> <boundary conditions of catchment>
If you have to, you could extract only the catchment to a separate
vector, so that you don't need to fool around with complex boundary
conditions.
But I'm sure that a genuine Grass expert will have a simpler solution
than this ...
Cheers,
Richard
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