Edit Image Altitude

Manually Enter the Altitude

Manually enter the altitude of the selected image.

The altitude must be relative to sea level and entered in the same units (feet or meters) as you've specified in the program options.

Positive numbers are above sea level, negative are below.

Optionally, you can enter a relative altitude by preceeding it with an @ symbol. The value after the @ symbol will be added to or subtracted from the existing altitude. For example, if an image's altitude is 1000 meters and if you enter @-300, the new altitude will be 700 meters.

If you own a Garmin GPS unit that doesn't support the transferring of altitude data, use this option to manually enter the values. You may want to do this anyway to correct the normal errors that occur when any GPS receiver records altitude data.

Lookup the Altitude

If your photos contain latitude and longtiude information, you can lookup the altitudes using NASA's SRTM data. Note that this data only exists for most land areas between the latitudes of 60 degrees north and 56 degrees south and that it was recorded at 3 arc-second intervals (about 90 meters). Because of the recording interval, the data for areas with steep elevation changes may not be accurate enough for your needs.

Normally, you should not use this option if your GPS records accurate altitudes, as would be the case if the GPS had a built-in barometric altimeter.