[Qgis-developer] Use of Tiny WKB

[Jean-Roc Morreale]

Hi,

I would like to know if any of you (strk?) had a thought on the use of 
Tiny WKB inside QGIS's memory layer, it's a format created by Nicklas 
Avén and included in PostGIS 2.2's trunk

To sum up, TWKB is a compressed binary format that allows to :
- control of the decimal precision
- relative coordinates
- id stored in the geom

The main advantages are :
- weight reduction, even for a single point
- no time wasted computing the edge position at 
6589786.35633001290261745 when your viewscale's resolution is over 1m

I think it is similar to the work done by Alavaro Huarte as it seems to 
be a way to improve display's efficiency without significant loss.

Blog posts about the format :
http://blog.jordogskog.no/tag/twkb/

ST_AsTWKB :
http://postgis.net/docs/manual-dev/ST_AsTWKB.html

Regards,
Jean-Roc Morreale