Longitude and Distance Traveled
The latitude and longitude data from satellite-tracked animals may be difficult to understand at first. For
example, if an animal's latitude changes by 1 degree, how far did it move? The measurements outlined in Chart #1
and Chart #2 will help you interpret the data you'll receive during migration.
1. Measure Latitude Changes at 40 N (Chart
On a map, measure the change in distance when the LATITUDE changes by 1 degree. For example, begin at 40 N and
measure the distance to 41 N. Next figure the distances when latitude changes by .1 degrees and .01 degrees. (You
can do the math in your head; you don't need to measure on a map.) Record your data on Chart #1.
2. Measure Longitude Changes at 40 N (Chart
Now measure the distances on a map when the LONGITUDE changes by 1 degree, from 72 W to 73 W for example. Then
figure the distance involved when longitude changes by .1 and .01 degrees shown. (Again, you can do the math in
your head; you don't need to measure on a map.) Record your data on Chart #1.
3. Compare Measurements at Different Latitudes (Chart
On Chart #2, do the same measurements but at the various latitudes shown.
4. Keep Your Charts!
Keep your completed chart handy for use with satellite-data.