Grid Point #: 002590 
Longitude:  -103.7347
Latitude:     21.2249
Contributing Station, distance (km).
IIEG   67.2
UGEO   71.2
JAGU   72.4
TNAM   80.3
ANIG   83.7
INEG  165.6
IZAC  207.9
IDGO  328.5