[postgis-users] Open buffers or parallel lines

[Andreas Neumann]

Hi all,

I am looking for either a "parallel line" feature or "open buffers around
a linestring element".

The idea is to visualize a waste-water system where in large map scales
the actual diameter of the waste-water pipes (canalization). The linecaps
shouldn't be stroked, but the parallel offset to the centerline should be
drawn.

Are there any tricks how this can be done in Postgis? I see that there is
st_buffer, but there is no option to get an open buffer or parallel lines.

Thanks for any hints,
Andreas


-- 
Andreas Neumann
http://www.carto.net/neumann/
http://www.svgopen.org/