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Circle Plot generates a customized KML file which is then opened in Google Earth and other KML-capable browsers, or opened as a text file.  The KML browser must be downloaded and installed separately from this program.  The user may specify up to four concentric radii and set labels for the center point marker.   Use NAD83 or WGS84 coordinates for best accuracy.  Enter longitude degrees as negative for West Longitude, and latitude degrees as negative for South Latitude.  This is the common usage for most GIS programs.

This page uses Javascript. You must allow your browser to run the scripts on this page for best results.


Optional data conversion for Circle Plot
° ' "   + degrees N Lat
-  degrees S Lat
° ' "   + degrees E Lon
-  degrees W Lon

Enter Data for Circle Plot

Enter Decimal Degrees for Circle Plot:
  Latitude:      Longitude:

Enter Radius Units -- kilometers    miles


Circle 1 radius:     RGB Color:          
Circle 2 radius:     RGB Color:          
Circle 3 radius:     RGB Color:          
Circle 4 radius:     RGB Color:          

User's Point Name:

Brief description:

  Open KML Map        Show Text File




The generated circles are not true circles, but are drawn using 360 points on the circumference at 1° azimuths from the center point.







The steps to use this KML generator are simple enough:
  1. Use the form above to generate the KML file.  It should then Google Earth, if that is installed and set as the default for opening KML files.
  2. Optionally, save the KML text file from your browser to your computer, either as a TEXT file or an XML file but with a ".kml" extension, for example, "MyPoint.kml".
  3. Then open the text file using your Earth browser's "File | Open" command.

The circles are not true circles, but are drawn as lines connecting 360 points on the circumference at 1° azimuths from the center point.

The FCC does not place any restriction on the use of these KML files, however, it remains your responsibility to check the policies and documentation for your mapping browser regarding any restrictions on the use and sharing of maps generated through the use of that software.

Comments and suggestions regarding Circle Plot may be directed to Dale Bickel, dale.bickel@fcc.gov.


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Thursday, November 17, 2022