First of all the license situation of GIMP is somewhat unclear, OSM does not qualify as academic purpose and it is not clear if the citation OSM can provide on the contributors page on the wiki is sufficient - so you would need explicit permission.
The current situation of the Greenland coastline in OSM en large (with the exception of some local mapping in smaller areas) is the following: - west coast is mostly PGS based - east coast is mostly GADM based - north coast is based on MODIS imagery, partly improved by Landsat in the far north. The GIMP land ocean mask is higher resolution than most of the current data in OSM but of varying quality. You'd have to deal with a number of problems: - wrong classification due to shadows and wet snow. - positional accuracy problems due to bad alignment of Landsat images used. - outdated ice coastlines due to 15 year old data basis Examples showing this (from East Greenland as magenta mask in comparison to up-to-date Landsat imagery and the OSM coastline (blue line)): http://www.imagico.de/files/coastline_greenland1.png http://www.imagico.de/files/coastline_greenland2.png So to get actual improvements out of this compared to current data you'd need to manually fix a lot of problems and would still end up with data significantly worse than what you could produce from available imagery by hand (or where water is ice free in summer with semi-automated mapping). By the way if you have contacts to Greenland mapping authorities getting data and permission to use for names of islands, mountains, fjords, bays etc. would be most valuable. For a mapper working in essentially unpopulated areas like northern and eastern Greenland such are difficult to determine reliably. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
