Contour Map Creator


Go to the desired location in the map, set two markers to define a rectangle (or enter them manually). Click the button get data and upon success button draw contours. Optionally you can change the number of elevation samples you want in each direction. If you go beyond 2500 total samples per day, querying data may stop working according to the API description. You can also change the number of contours or set custom contour values. If you want to clear the map click the button clear map

This script was developed with the Firefox browser and may not work in other browsers. No warranty whatsoever is given, including but not limited to functioning or correctness.

Resources: This script uses the Google Elevation API, Google Maps, jQuery and the CONREC contouring algorithm by Paul Bourke.

Created by Christoph Hofstetter (christophhofstetter (at) August 2013 V0.3


North West corner

South East corner

Number of sample points on North-South axis:
Number of sample points on West-East axis:

Elevation Data


Area to double check the requests that were sent: