[OSM-talk] OSM maps on Garmin GPS

[SteveC]

* @ 21/11/06 02:12:10 PM schuyler at nocat.net wrote:
> * On 21-Nov-2006 at  5:32AM PST, raphael Jacquot said:
> > > 
> > > You make it sound like magic.  What is the essential algorithm or 
> > > data structure in PostGIS that causes this speed-up?  Could the 
> > > same speed be achived with the GIS extensions to MySQL?  Could it 
> > > be achieved by changing the old OSM tile generation code on top of 
> > > 
> > simple...
> > the r-tree based GIST index on bounding boxes that's applied on the 
> > geometry column :D
> 
> MySQL 5.0 claims to support R-tree based spatial indexing:
> 
>   http://dev.mysql.com/doc/refman/5.0/en/optimizing-spatial-analysis.html
> 
> Haven't used it, so can't say how efficient it is. I've been in
> favor of backing OSM with a proper spatial database from day one, so I

For any reason other than a hunch?

I thought nick hill disproved all this?

have fun,

SteveC steve at asklater.com http://www.asklater.com/steve/