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:
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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 |