[OSM-talk] Help to import Rio de Janeiro city data to OSM - misaligned shapefiles

[Iván Sánchez Ortega]

El día Friday 14 May 2010 19:14:35, John Smith dijo:
> Since the advent of satellites spinning round the globe, and more
> specifically the GPS cluster of satellites, they now use the centre of
> the mass of the earth.

Problem is, the center of mass moves along with the continental drift. Have 
you heard of gravimetrics? You can have looooots of fun with it.

-- 
Iván Sánchez Ortega <ivan at sanchezortega.es>

Un ordenador no es una televisión ni un microondas: es una herramienta 
compleja.