| Sampling |
| North West corner Latitude: Longitude: |
| South East corner Latitude: Longitude: |
| Sampling points: N-S axis: W-E axis: |
| Plot Options |
Start at:
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| Units: |
| Rounding for legend (decimal places): |
| Save/Load Cookie |
| Other Options |
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Go to the desired location in the map, set two markers by clicking the map to define a rectangle, then set the corrdinates by clicking Get Coords (or enter coordinates manually).
Set the sampling point desitiy. Click Get Data to start querying elevations.
Note: Do not make samples sizes too large. If you go beyond 2500 total samples per day, querying data may stop working
according to the Google Elevation API description.
After the data is queried, you can change plot options and update the drawing by clicking Redraw Contours. This will not re-query the data, only redaw the lines.
You can save some data in cookies, however there is a limit. Use the manual saving text areas below alternatively.
Resources: This script uses the Google Elevation API, Google Maps, jQuery and the CONREC contouring algorithm by Paul Bourke and Jason Davies.
If you want to have the contour maps as an individual layer (e.g. to create overlays) you can copy the code underneath the image below and save it as an svg file. Please note, as for now, the drawing below is square and you may want to stretch it to cover the actual area in a map.
| Download SVG file |
| Download KML file |