Survey number: COOK (contains Pat Hill number 291)
Name: Cook Inlet compilation map
Date flown: 1957 and 1958
Company: USGS and Aero Service
Flight specs: various, possible 2 mi spacing, east-west, 2500 ft barometric
Instrument: 

Digitized by: DIGIMAP (Esther Castellanos, January 1997)
Map scale: approx. 1:193,000

Datum: arbitrary datum

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)

Reference: Paper map (scale approx 1:193,000) obtained by George Plafker
           from Marathon Oil Co.  Permission to use obtained by 
           Robert Morin from Steve Trudell 7/15/96.  Map is annotated
           as follows: "Aeromagnetic Survey, Total Intensity Contours,
           Aero Service Corporation, 1957 - 1958, Contour Interval
           5 - 10 gammas."