Magnetic Data
Aeromagnetic Data of Northern Chile
data: gridded aeromagnetic data (nT), residual anomaly
geogr. location: longitude: from 71° to 67°W; latitude: from 26° to 20°S
data type: grid data, grid size: 2500 x 2500 m
file format: ASCII- file
file size: 24 KByte
example from data file (projection: UTM (Hayford Ellipsoid, a=6378.137, 1/f=298.257 with meridian -69°)):
C Aeromagnetik north Chile
C overlapping area: region Salar de Atacama with High Cordillera
C Coastal Cordillera south of Iquique
125 266
377500.00 687500.00
7125000.00 7787500.00
-250.00 550.00
9999.00 9999.00 9999.00 9999.00 9999.00 9999.00 9999.00
9999.00 9999.00 9999.00 9999.00 9999.00 9999.00 9999.00
9999.00 9999.00 9999.00 9999.00 9999.00 9999.00 9999.00
download: file
source: aeromagnetic maps (1:250.000) from SERNAGEOMIN, Santiago; digitized and gridded by AG Gravimetrie (1988)
Marine Trackline Magnetics of South America
data: location (geogr. degree), residual field
geogr. location: longitude: from 90° to 60°W; latitude: from 60° to 15°S
data type: point data
file format: ASCII- file
file size: 2.6 MByte
example from data file:
C Space delimited XYZ Format: lat, lon, residual field in gammas
C Magnetics Residual Field
C Output Single File with all Survey Data
C
1 1
-89.99750 -10.51420 -20.0
-89.98470 -10.51110 -15.0
-89.97200 -10.50800 -10.0
-89.95920 -10.50490 -10.0
download: file
source: NOAA, U.S. National Geophysical Data Center, NGDC's GEODAS Marine Trackline Geophysics database (Ver. 3.3)
correlated information: http://www.ngdc.noaa.gov/mgg/geodas/trkdas.html, http://www.ngdc.noaa.gov/mgg/mggonline.html, integrated in database Feb 1998.
Marine Trackline Magnetics of South America, Patagonia
data: location (geogr. degree), total field (gammas) (or residual field)
geogr. location: longitude: from 90° to 55°W; latitude: from 60° to 28°S
data type: point data
file format: ASCII- file
file size: 52 KByte
example from data file (noaa-magres-2.dat):
C Space delimited XYZ Format: lat, lon, residual field in gammas
C Downloading only records containing:
C Magnetics Residual Field
C Output Single File with all Survey Data
C
1 1
-66.43057 -55.95143 -65.4
-66.44500 -55.96090 -63.5
-66.45822 -55.97075 -62.0
-66.47239 -55.98056 -57.0
download: file
source: NOAA, U.S. National Geophysical Data Center, NGDC's GEODAS Marine Trackline Geophysics database (data added since Ver. 3.3), available via anonymous ftp: http://www.ngdc.noaa.gov/mgg/gdas/gd_cri.Html
correlated information: http://www.ngdc.noaa.gov/mgg/geodas/trkdas.html, http://www.ngdc.noaa.gov/mgg/mggonline.html, integrated in database Feb 1998.