The files map2020_pga, map2020_0.2sa, and map2020_1.0sa are txt files in ASCII format. The colummns are arranged as follows:

First column: longitude
Second column: latitude
Third column: ground motion value for 95 yr return period
Fourth column: ground motion value for 475 yr return period
Fifth column: ground motion value for 1100 yr return period
Sixth column: ground motion value for 2475 yr return period
