[OSM-talk] Correcting coastlines

OJW streetmap at blibbleblobble.co.uk
Tue Aug 22 19:39:50 BST 2006


There was a discussion on IRC about whether to upload PGS coastline 
data "as-is", or to try and correct the 10-30m shift that it appears to have 
relative to some other datasets.

http://wiki.openstreetmap.org/index.php/PGS_errata

Any views on this?  Shifting the data will require us to justify how we 
calculated the error (e.g. several of the screenshots people have given me 
seem to be from google maps) and preferably we need a model for the error 
which is consistant worldwide.

Regards

OJW

p.s. how's Sydney harbour correlating with other data? 

p.p.s. did anyone email NGA to ask?





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