Eclipse Path - 04 December 2021 Map
Created By: kirkw3
Last Updated: November 18th, 2021 12:11am
West: -140.481° East: -32.81°
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This map is a transparent overlay of the path of the total solar eclipse of December 04, 2021, which will pass across the South Orkney Islands and Antarctica. It shows estimates of the centerline, north boundary, and south boundary of the path of totality. This overlay is intended to be displayed on Garmin devices on top of a user's ordinary map and will show the eclipse path with respect to the land and ocean areas depicted in the ordinary map.
Feel free to use this map and to pass it on to other people, but please read and pass along this disclaimer, too:
NOTICE: This eclipse path map is a close approximation but is NOT exact.
This map for Garmin devices should ensure that someone reasonably inside the displayed eclipse path should be able to witness totality. This map was compiled based on eclipse boundary points calculated by David Herald's astronomical occultation prediction program Occult 126.96.36.199. A small number of additional boundary points were provided by Fred Espenak and NASA's GSFC. Astronomical data used with Occult 4 was updated on November 14, 2021. The updated data should enhance the accuracy of the map's predictions. However, it cannot be precise. In general, various astronomical sources incorporate slightly different eclipse elements into their calculations, which will result in slight differences in predicted eclipse path boundary lines. In addition, the map's curves were interpolated from a finite collection of fixed points and rounding or compression errors may occur during the compilation of the map. More importantly, the curves of this map do not take into account the irregular, mountainous edge of the moon. These lunar irregularities may shift the eclipse's shadow on earth by up to 1 to 3 km (0.6 to 1.9 miles) north or south. All of these factors are significant to viewers situated near the edge of the path. Those users are advised to consider the north and south limit lines as approximate when viewed at high zoom levels. Viewers should NOT use the curves of this map to position themselves at the precise edge boundaries of the eclipse path. This map's accuracy is not sufficient. Instead, those people wishing to do so should consult an accurate scientific reference just prior to the time of the eclipse. Note that the user's map must be capable of displaying the continent of Antarctica in order to view the complete path.
Read the file "Readme_eclipse_path_instructions_04dec2021.txt" included in the zip file for map installation instructions and other information.
This eclipse path map was created and compiled by GPS File Depot member kirkw3 from data calculated by David Herald's Occult 4 occultation prediction astronomy program, version 188.8.131.52 along with a small number of data points from Fred Espenak and NASA GSFC's prediction. Ephemeris DE441 and program-estimated deltaT=69.50 were incorporated into Occult 184.108.40.206's computations. Data was parsed and organized manually and with Notepad++ v.6.7.7 and MapEdit++ ver. 220.127.116.116, then complied with splitter-r597 and mkgmap-r4588 on November 17, 2021. While believed to be accurate within the described limitations, the author assumes no responsibility for this map file's use/misuse or any consequential damages.
This map was posted on GPSFileDepot.com on November 18, 2021. The URL links in the text above were valid on November 18, 2021.
Changes: November 18, 2021 New map posted to GPSFileDepot.com.
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