You can download the contour data from my Google Drive at: I have no idea if it it would be reasonable to access the contours from a web server, since I don't have a web site to try it out. I did try them out across a WiFi connection from laptop to desktop, and it still seemed usable. I have the data stored locally on each computer, and I leave the contours enabled when using Google Earth.
It works fine on a 5 year-old Mac laptop and a 5-year old Mac Pro desktop. (When I started, I had assumed I would have to open individual 4圆 blocks). I was very pleased when I discovered that Google Earth could handle all the contours for the whole world. That way one could navigate around the globe without clutter, then zoom in and see the contours lines. I discovered how to specify KML regions, so I could make the contours disappear above an eye height of about 100 miles. I chose a contour interval of 200m, a compromise between too many and too few lines and labels as one zooms in and out. (KML is the xml data format used by Google Earth). I used the Global Mapper GIS program on Windows to generate KML contours for each data block.
The elevation grid comes in 4圆 degree blocks.
The world-wide data set totals about 17 GB. I generated vector contours for Google Earth using the corrected SRTM03 (30m grid) world-wide elevation data created by Jonathan de Ferranti at. My idea was to enhance the Google Earth display with contours, so I could more readily visualize topography, especially in the higher ranges like the Himalayas and Andes.
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