| EarthAtlas - Mapping System for Earth Sciences Data | Geographic Projection, Global Extent | Pseudo- Mercator | 
| served by Rapid Integrated Mapping System (RIMS) | Polar Projection, Northern Extent | 
| Available Datasets | Dataset and Map Options | |||||
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 | Raster Data Resample: 
				    Nearest Neighbour
				    Bilinear
				    Lock
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| Point Data: Use Point Control (green button) on the map or seach from menu above | ||||||
| Overlays:
				  Admin. 
				    
				      Bing
				       
				        
					Opacity:
					 
				    
				      OSM
				       Opacity:
					 
				    N
				    M Rivers
				  Hydro 
				  Graticule | ||||||
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| Loading Tiles...
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| The Map Data CalculatorThe Vector Polygon Tools
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| Top | |
| Bottom Lock | None | 
| Opacity of Top Layer: | |
|  | Checking calculation status... | 
| • Use ESC key to stop drawing or modification of polygons. • With the selection "Polygon" active (radio button is on), existing polygons can be modified by clicking and dragging vertices or borders. • De-Select option draws "negative" polygons for subtraction. | Shortcut keys: • Use ukey to remove last drawn polygon point. • Use Delete key to remove selected polygon. • Use rkey to remove selected polygon vertex. • Use dkey to densify selected polygon(s) in map projection. | 
| Notes: • "Densify" causes saved polygons to have much finer spacing of vertices, so that chronologies in polygons remain in polygons regardless of change in map projection. | |
| ID | Shape | Symbol | Rm |