[GRASS-user] how to find peaks

[Daniel Victoria]

Well, it's not as straight forward as that. The preservation areas are
more for land cover changes and such. There is a specific part in the
legislation which states that "activities with no locational
alternatives" like mining, can occur in hill tops. There is also a
part about watershed divides (only big formations, not small divides)

The legislation is a bit complicated and filled with controversy!
After all, how do you find the hill / mountain bottom in order to
calculate the top 1/3? The environmental agencies wants the botton to
be as low as possible. The agriculture / forestry lobby wants to push
it up (they always talk about the first saddle point...). Furthermore,
the law defines what are mountains and hills. But that is not a
consensus also...  That's one of the many reasons why the entire
brazilian environmental legislation is under "attack" (ops, I should
say revision)...

This is a very complicated issue that I, somehow, got involved in. But
once it became too political, I moved away from the discussions. But
if you are curious about it, fell free to ask

Cheers
Daniel

On Wed, Nov 18, 2009 at 9:18 PM, Rich Shepard <rshepard at appl-ecosys.com> wrote:
> On Wed, 18 Nov 2009, Daniel Victoria wrote:
>
>> Some friends and I had a similar problem once. We had to find hilltops
>> because, according to Brazilian environmental legislation, they are
>> environmental preserves. (Top 1/3 of the mountain / hill has to be
>> preserved)
>
> Daniel,
>
>  Does this mean that the bottom 2/3 can be mined as long as the top 1/3 is
> preserved? Interesting idea.
>
> Rich
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