[Qgis-developer] Use of Tiny WKB

Jean-Roc Morreale jr.morreale at enoreth.net
Wed Jan 15 05:47:40 PST 2014


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 :


Jean-Roc Morreale

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