[Imports] [Talk-us] MassGIS Building Import - simplify

[andrzej zaborowski]

Hi,

On 14 December 2012 02:12, Jason Remillard <remillard.jason at gmail.com> wrote:
> In my town, there are 5427 buildings. 43,628 nodes, or 8 nodes per
> structure. I did a 0.25 meter simplify on the entire town, and the node
> count went down to 41,809. We are looking at an excess of 5%. 0.25 meter may
> seem tight, but consider that source data was from 30cm and 15cm per pixel,
> and I am sure the algorithms used do some kind of sub pixel interpolation.
> Until I can figure out how to do the simplification from my scripts,
> ..

As I understand some processing is done in PostGIS already.  You could
add a ST_SimplifyPreserveTopology(the_geom, 0.25) at the end of the
process and it should have the same effect.

Cheers