Survey number: 204A and 204B (Pat Hill numbers)
Name: Ugashik North and South
Date flown: May 1955
Company: USGS
Flight specs: 2 mile, N-S and NW-SE, 1000-1300 ft barometric.
Instrument: ?

Digitized by: Esther Castellanos, 1992
Map scale: 1:125,000

Datum: arbitrary 

Publication: USGS Maps GP-353 and GP-354

Data format: Ascii format, XYZ records 
             Longitude (degrees), Latitude (degrees), Total Field (nT)
             written with FORTRAN format: (f10.5,x,f10.5,x,f8.1)