Greenland is generally poorly mapped - the only full map cover is in scale 1:250K. The few and small settlements and towns are though mapped in 1:500 by my former workplace Asiaq Greenland Survey. After a donation of aerial imagery from Asiaq to Microsoft Bing, OSM'ers in Greenland and abroad have been kind to map the larger towns in high detail, myself I am digitizing the small settlements one at the time (1-2 hours each).
Although the number of settlements and mapped features are quite few, the task of mapping the topography of Greenland outside the settlements are enormous. The most import object is the coastline, which is detailed in Greenland from numerous fjords and archipelagos and around 85,000 km in length - measured in scale 1:250K, so definitely more when mapped in detail. In the early days of OSM, when data on Greenland was totally missing, the user opani, imported coastline data from PGS + manual digitization of the poor PGS data for Greenland. But the OSM coastline of Greenland is very coarse, except for edits near the settlements. I have been in contact with opani via OSM messaging, and he provided me with the data history but is not able to help enhancing the coastline. I have derived a new vector coastline (½ GB) for Greenland. The coast line is basically a smoothened raster to vector conversion in GDAL using a land/sea mask from a US research project named GIMP - Greenland Ice Mapping Project - led by Dr. Ian Howat from Byrd Polar Research Center at Ohio State University. The original land/sea mask raster is prepared from primarily Landsat7 ETM+ and Radarsat classifications. The land/sea mask is provided from http://bpcrc.osu.edu/gdg/data/icemask and can be used for any academic purpose, including OSM as long as they are cited when used. Citation from the principal investigator: *From: Ian Howat <[email protected] <[email protected]>>Sent: 22 March 2015 22:33To: Karl ZinglersenSubject: Re: GIMP Ocean & Ice Mask in Open Street MapKarl,Thanks for the information. GIMP and the SETSM DEM may be used for any academic purpose as long as they are cited when used in presentations/publications. Ian**Data Citation:* * Howat, I.M., A. Negrete, B.E. Smith, 2014, The Greenland Ice Mapping Project (GIMP) land classification and surface elevation datasets, The Cryosphere, 8, 1509-1518, doi:10.5194/tc-8-1509-2014* I have great experience with geospatial work in general and OSM editing, but no experience with OSM imports. There isn't an OSM-editor community here in Nuuk for the task, so I am asking for people to assist me across borders. I need help to: 1. Planning the process 2. Prepare vector data properly for import 3. Take caution of already detailed coastlines. 3. Assist with the import and eventual edits. - many parts hold mistaken classifications. I have a much smaller set of building in the abandoned mining village of Qullissat to eventually start with. Best regards, Karl Zinglersen -- Karl Brix Zinglersen
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