GPS Visualizer's Elevation Lookup Utility

Assign "missing" elevations to a batch of GPS coordinates

Your input must be in the form of a tab-delimited or comma-separated (CSV) table with a header row, and there must be columns defined as "latitude" and "longitude" (or "lat" and "lon"). If your data already contains some non-zero elevation values (under an "altitude" or "elevation" heading), they will be preserved.

If you've got a GPS data file (GPX, KML, etc.), you'll need to use the plain-text converter to put your data in tabular format before using this form to fill in the elevations.