|
|
|
|
|
|
|
|
|
|
|
|
3062
|
Three Rivers (Freer)
|
Geodata
|
12/74
|
1 mi.
|
NW-SE
|
500 AG
|
1570
|
IGRF65
|
OF75-294
|
|
4115
|
Lockhart
|
Airmag
|
11/82
|
6 mi.
|
E-W
|
1500 B
|
385
|
IGRF80, 49253
|
OF84-207
|
|
4116
|
East-central Texas
|
Airmag
|
11/82
|
6 mi.
|
E-W
|
1500 B
|
1495
|
IGRF80, 50021
|
OF84-208
|
|
4255
|
Medina-Uvalde
|
Spectra
|
3/01-4/01
|
0.25 mi.
|
E-W
|
500 AG
|
9830
|
IGRF00, 48400
|
OF02-049
|
|
5025
|
Christmas Mountains
|
HighLife
|
06/79
|
0.25 mi.
|
E-W
|
400 AG
|
483
|
IGRF75
|
GJBX-195(82)
|
|
5026
|
El Solatario
|
HighLife
|
06/79
|
0.25 mi.
|
E-W
|
400 AG
|
551
|
IGRF75
|
GJBX-195(82)
|
|
5027
|
Green Valley/O2 Ranch
|
HighLife
|
06/79
|
0.25 mi.
|
E-W
|
400 AG
|
2070
|
IGRF75
|
GJBX-195(82)
|
|
5028
|
Buckshot/Sierra Viego
|
HighLife
|
07/79-08/79
|
0.25 mi.
|
E-W
|
400 AG
|
3899
|
IGRF75
|
GJBX-196(82)
|
|
5030
|
Dryden
|
HighLife
|
06/79-07/79
|
0.25 mi.
|
E-W
|
400 AG
|
3870
|
IGRF75
|
GJBX-024(83)
|
|
5031
|
Indian Wells
|
HighLife
|
07/79
|
0.25 mi.
|
E-W
|
400 AG
|
400
|
IGRF75
|
GJBX-024(83)
|
Description of Table
No.: Internal USGS
identification number
Name: Internal project name (not always the name used in publication
title)
Flown By: Company or government agency who flew the original
survey
Spacing and Dir.: Primary flight-line spacing and primary
flight-line direction
Altitude: Primary flight altitude in feet; B = barometric elevation,
AG = above ground draped over topography
LnMi.: Approximate total of line miles flown for this survey
Datum: Indicates if a regional field was removed and, if it could
be determined, the base value removed. Total field = no regional was removed.
Arb. (arbitrary) datum = the base value removed was not stated on the map
or in survey reports.
Publication: Brief publication reference*.USGS
publications are listed as: Open-File reports = OFxx-yyyy where xx is
the publication year, Bulletins and Professional Papers = B-yyyy or P-yyyy,
Geophysical Maps = GP-yyyy, Miscellaneous Field Studies Maps = MF-yyyy,
Miscellaneous Investigations Maps = I-yyyy.
*For a full reference for USGS publications see:http://library.usgs.gov/