Circumpolar Arctic Coastline and Treeline Boundary

 

Coastline and Treeline Boundary Map

Circumpolar Arctic Coastline and Treeline Boundary

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The coastline for the CAVM came from the Digital Chart of the World (DCW; ESRI 1993). The DCW coastline was at a much finer scale than needed for the CAVM project. The coastline was simplified by deleting all the attributes from the DCW and deleting all islands smaller than 49 km2 using the ARC/INFO ELIMINATE command. The coastline was further simplified by removing any arc verticies that were closer together than 5000m (Arc generalize command, 5000 m weed tolerance, bendsimplify option), and combining any two lines closer than 500m (Arc fuzzy tolerance = 500m). After the initial simplification of the coastline data all subsequent processing of the vegetation data were performed using a 200m fuzzy tolerance.