Ladue Geophysical Survey

The digital data below was produced from airborne geophysical surveys conducted in 2010 for the Ladue survey area in the Fortymile mining district, Tanacross quadrangle, eastern Alaska. Aeromagnetic and electromagnetic (EM) data were acquired by helicopter for about 742 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2011-1 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data; and (4) vector files of data contours and flight lines. A future publication will include the technical project report, interpretation map, and EM anomalies, as well as other files.

Available Data Metadata Overview
File Name Data File Format Download File Size
gpr2011-1_vectors Shapefile Download 100.3 M
gpr2011-1_maps-HPGL2_1-5 Plot files Download 121.4 M
gpr2011-1_maps-HPGL2_6-8 Plot files Download 112.9 M
gpr2011-1_maps-HPGL2_9-13 Plot files Download 109.7 M
gpr2011-1_linedata-XYZ Line data XYZ files Download 207.9 M
gpr2011-1_linedata-GDB Line data GDB files Download 205.6 M
gpr2011-1_grids-GRD Gridded data Geosoft format Download 112.9 M
gpr2011-1_grids-ERS Gridded data ER Mapper Download 112.8 M
gpr2011-1_kmzs Google Earth files Download 22.0 M
gpr2011-1_geotiffs Georeferenced raster files Download 15.3 M
gpr2011-1_maps-PDF Adobe PDF files Download 133.8 M


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  • GPR 2011-1. Ladue survey area: Magnetic and electromagnetic line, grid, and vector data and Maps, Fortymile mining district, Tanacross Quadrangle, eastern Alaska. 2 linedata files, 11 grids, 11 GeoTIFFs and Google Earth KMZ files, 9 vector files, and 13 maps (26 sheets total) available on DVD for $10. Individual sheets available for purchase.