Marks on the map
The calculator displays areas specified by the coordinates of vertices on a raster map.
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This calculator can be used to add annotations to a raster map. The map is loaded as an image, for which the coordinates of the upper left and lower right corners are specified. Details are below the calculator.
Overlaying polygons on a map
Polygons
| Coordinates | Color | Transparency | ||
|---|---|---|---|---|
Left top map coordinates
Right top map coordinates
- Drag files here
Mark coordinates are specified as an array of space-separated pairs of numbers (latitude and longitude in decimal form). Negative values for latitude are south latitude, and negative values for longitude are west longitude. If necessary, use a degree converter to convert coordinates to decimal form Degrees-minutes-seconds to decimal degrees conversion and vice versa..
Marks can be of two types: points, displayed as markers, and polygons (areas), displayed as filled areas. Two or one pair of coordinates are displayed as points. Otherwise, a polygon will be constructed and filled with the specified color. If a self-intersection of non-adjacent sides is found in the coordinates of the polygon's vertices, a set of points will be displayed instead of a polygon.
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