This map of Chile and Argentina shows the path of the Moon's umbral shadow — the path of totality — during the total solar eclipse on July 2, 2019. Features include national boundaries, major roads, and place names. The umbra is shown at 3-minute intervals labeled in the local time zone of the umbra center (Chile or Argentina standard time). To read about the reason the shapes aren't smooth ovals, go here
. At 300 DPI, the scale of the map is approximately 1:4,000,000.
The map uses a number of NASA data products. The land color is based on Blue Marble Next Generation
, a global mosaic of MODIS
images assembled by NASA's Earth Observatory. Elevations are from SRTM
, a radar instrument flown on Space Shuttle Endeavour during the STS-99 mission. Lunar topography, used for precise shadow calculations, is from NASA LRO
and JAXA Kaguya
. Planetary positions are from the JPL DE421
ephemeris. The lunar limb profile and eclipse calculations are by the visualizer.
The map below shows the global extent of the shadow path. The umbra is drawn at 10-minute intervals.
The map was rendered in animation software, but maps are more typically created using geographic information system (GIS) tools and vector datasets. A set of shapefiles describing the umbra and penumbra extents is provided below in two Zip archives, one for small-scale (global) maps and the other for larger-scale mapping.
contains the following shapefiles:
contains the contours for maximum obscuration at 5-percent intervals from 95% to 5%, and the penumbra edge at 0%.
contains the complete path of totality.
contains umbra shapes at 1-minute intervals from 18:02 to 20:44 UTC, covering the complete timespan of totality.
contains the complete center line.
The projection for all of these shapefiles is WGS84, latitude-longitude, in degrees. A minimal .PRJ file reflecting this projection is included for each shape.
is intended for larger-scale (higher resolution) mapping. It contains the following shapefiles:
contains 560 umbra shapes at one-second intervals from 20:35:30 to 20:44:49 UTC. These are high-resolution shapes with roughly 100-meter precision. The attributes for each shape include both a string representation of the UTC time and an integer containing the number of seconds past midnight of eclipse day.
contains the path of totality, limited to the extent of the 560 umbra shapes. Both the path and the umbra shapes are truncated at 75°W.
contains the center line as a polyline with points at one-second intervals.