[GRASS5] vector lines buffers by spatial queries in Postgres (example)

[Alex Shevlakov]

Hi,

I added some more queries examples, a picture and new simple c-code for
extending Postgres 2-d geometry capabilities. 

http://motivation.ru/grass/buff_q_example.html

We can make Postgres run line buffer queries.
Isn't that a substitution for some missing modules in GRASS?

Best,

--alex
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