[OSM-dev] Call to mobile developers: OSM binary file format
shaun at shaunmcdonald.me.uk
Thu Aug 7 10:47:55 BST 2008
Chris Browet wrote:
> Do you think about floating-point or fixed-point
> This is one of the things to discuss. For mobile applications,
> fixed-point is the most efficient but we have to balance this with the
> loss of precision.
Actually the OSM db stores the node's lat and lon as integers. There is
a scaling factor of 10000000 done on the fly when you read and write notes.
More information about the dev