Gravity map and data of the eastern half of the Big Bear Lake 100,000 scale quadrangle, California and analysis of the depths of several basins.

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/02-353/metadata.faq.html
Description An isostatic residual gravity map of the Big Bear Lake 100,000 scale quadrangle, California was prepared and then this data set used with other information to compute the configuration of several ground water basins. Basin thickness maps were then prepare
Originators Roberts, C. W.; Jachens, Robert C.; Katzenstein, A.; Smith, G. A; and Johnson, R.
Publication U.S. Geological Survey Open-File Report 02-353

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(table row)

Gravity observation. Attribute labels here were made up by the metadata editor; they do not appear in the data file.

Label Definition
(stname) Station name (columns 1- 8 type A8)
(latdeg) Degrees of latitude (columns 10-11 type I2)
(latmin) Hundredths of minutes of latitude (columns 12-15 type I4)
(londeg) Degrees of longitude (columns 17-19 type I3)
(lonmin) Hunderedths of minutes of longitude (columns 20-23 type I4)
(elevft) Elevation, in tenths of feet (columns 24-29 type I6)
(obsgrav) Observed gravity, in hundredths of mGal, without leading 9 (columns 30-36 type I7)
(acc1) General elevation and location code
(acc2) Elevation code
(acc3) Latitude code
(acc4) Observed gravity code
(faa) Free-air anomaly, in hundredths of mGal (columns 41-46 type I6)
(sba) Simple Bouguer anomaly, in hundredths of mGal (columns 47-52 type I6)
(iztc) Inner-zone terrain correction, in hundredths of mGal (columns 53-57 type I5)
(tc) Total terrain correction, in hundredths of mGal (columns 58-62 type I5)
(tccode) Terrain correction code denoting extent of inner-zone terrain correction and system: upper case denotes Hayford-Bowie system of zones, lower case denotes Hammer system of zones. Z, computer calculated from 0.0-0.59 km (column 63 type A1)
(cba) Complete Bouguer anomaly reduced for a density of 2.67 g/cc, in hundredths of mGal (columns 64-69 type I6)
(ia) Isostatic gravity anomaly reduced for a density of 2.67 g/cc, in hundredths of mGal (columns 70-75 type I6)
(comment) Comment (columns 76-80 type A4)