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Mineral predominance map for Nabesna, Alaska, derived from imaging spectrometer reflectance data

MineralPredominanceMap

Dates

Publication Date
Start Date
2014-07-14
End Date
2016-07-21
Last Revision
2018-10-22

Citation

Kokaly, R.F., Johnson, M.R., Graham, G.E., Hoefen, T.M, Kelley, K.D., and Hubbard, B.E., 2018, Imaging spectrometer reflectance data, mineral predominance map, and white mica wavelength position map, Nabesna Quadrangle, Alaska (ver. 1.1, October 2018): U.S. Geological Survey data release, https://doi.org/10.5066/F7NV9H6F.

Summary

Reflectance data from HyMap™ were processed using the Material Identification and Characterization Algorithm (MICA), a module of the USGS PRISM (Processing Routines in IDL for Spectroscopic Measurements) software (Kokaly, 2011), programmed in Interactive Data Language (IDL; Harris Geospatial Solutions, Broomfield, Colorado). The HyMap reflectance data are provided and described in this data release. MICA identifies the spectrally predominant mineral(s) in each pixel of imaging spectrometer data by comparing continuum-removed spectral features in the pixel’s reflectance spectrum to continuum-removed absorption features in reference spectra of minerals, vegetation, water, and other materials. Linear continuum removal is a technique [...]

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Attached Files

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HyMap2014_mineral_predominance_classes_and_descriptions.csv 5.78 KB text/csv
LIST_CHANGES_MICAcmdfile_ver4_vs_ver6a.csv 6.54 KB text/csv
mica_cmds_group2_hymap2_2014_v6a_FOR_RELEASE.mcf 84.24 KB text/plain
mineral_predominance_hymap_nabesna_ak_july2014.clr 1.12 KB text/plain
mineral_predominance_hymap_nabesna_ak_july2014.hdr 6.33 KB text/plain
mineral_predominance_hymap_nabesna_ak_july2014.dat 145.64 MB text/plain
mica_colors_group2_hymap2_2014_v6.txt 4.43 KB text/plain
splib06b_cv_hymap2_2014_126ch 11.47 MB application/unknown
Revision_history.txt 1.21 KB text/plain
Extension: mineral_predominance_hymap_nabesna_ak_july2014.zip
mineral_predominance_hymap_nabesna_ak_july2014.tif 148.15 MB
mineral_predominance_hymap_nabesna_ak_july2014.tfw 90 Bytes

Purpose

The imaging spectrometer data were collected and processed as one component of a U.S. Geological Survey (USGS) mineral resource project with the goals of enhancing geologic mapping and developing methods to identify and characterize mineral deposits elsewhere in Alaska. Hyperspectral surveying is one method that can be used to rapidly acquire information about the distributions of surficial materials, including different types of bedrock and ground cover.

Additional Information

Raster Extension

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