Users can import text files with geographic (latitude/longitude) coordinates into Google Earth Pro and Enterprise editions.
Many forms of latitude/longitude coordinates are supported (scroll down on help page).
The Google Earth Guide has detailed information regarding importing GPS data directly into Google Earth. With Version 5, you can now import GPS coordinates into the free version of Google Earth.
You can either upload data directly from selected GPS units into Google Earth, or open a previously saved .GPX file of GPS data.
pop latitude longitude hap1 hap2 hap3
popA 35.929673 -78.948237 3 2 5
popB 38.889510 -77.032000 5 1 4
popC 38.032120 -78.477510 0 1 9
popD 36.379450 -75.830290 7 2 1
Files from the following locations may be large and cause problems if imported as-is into Google Earth. Data can be pared down in spreadsheet or statistical software (e.g., limiting to certain feature types) before importing.
Many of these featues are not already labeled or not clearly visible in the Google Earth database, so it can be a good way of adding more information.
Although written for an evolutionary biology application, it can be used to plot "any sort of frequency data with a geographic component."
Data must be in tabular format, with columns for latitude and longitude values (decimal degrees, negative values for south or west) and more columns representing the variables for which counts exist. Each row in the table represents a location (i.e., point) where the data was collected (e.g., survey point).
The application translates the data into a Google Earth .kml file, with frequencies for each point represented as proportional slices of a pie. Some fine tuning of the visulaization (color, size of pie, etc.) can be done in the PhyloGeoViz, and more fine tuning can be done after opening in Google Earth.