Hyperspectral Imagery Demonstration Project
(NTS 82N, 92O, 92P, 93A, 93B)
- Ward Kilby, Cal Data Ltd.
The Hyperspectral Imagery Demonstration Project will collect hyperspectral imagery over six sites in south central BC. The imagery will be made publicly available to provide a suite of data to allow mineral explorationists to become familiar with the capabilities and limitations of this exploration tool.
Access to the imagery will be through the BC Geological Survey's MapPlace web site and it will be available for download or online analysis with the Image Analysis Toolbox (IAT). The sites have been selected to include a variety of typical BC conditions and deposit types. These sites include two producing mines, a past producer, several active exploration projects and a vegetated site with interesting geological features.
The imagery will sample the electromagnetic spectrum between 0.4 and 2.45 micrometres with 178 bands of approximately 10 nanometres width and a ground sample spacing of approximately 2.5 metres. The image data cubes will be available in radiance and reflectance values with orthorectification lookup tables. The online IAT will be enhanced to provide spectrum viewing from the existing Landsat and ASTER imagery as well as the new hyperspectral imagery. The existing IAT tools are fully functional for hyperspectral data.
Typical analysis products will be generated from the imagery by this project to demonstrate some of its capabilities. These example products will be integrated into the MapPlace for easy comparison with other geological datasets.
- Posters and Presentations
- 2008: BC Hyperspectral Imagery Demonstration Project -- On The MapPlace
- Mineral Exploration Roundup Poster (pdf, 6.67MB)
- Technical Articles
- 2008: "Hyperspectral Imagery Demonstration Project, British Columbia"
- Summary of Activities 2007, Report 2008-1 p.67-76 (pdf, 11.2MB)
- Final Deliverables
- Geoscience BC Report 2008-2
Tools and SpecTIR Hyperspectral imagery for analysis and download - MapPlace's Image Analysis Toolbox (IAT)
January 28, 2008 - Geoscience BC is pleased to announce the release of data from the Hyperspectral Demonstration project (Geoscience BC Report 2008-2). Cal Data Ltd. completed this project with a grant from Geoscience BC. The project objectives were to obtain and make available high spatial and spectral resolution imagery over varied mineral deposit types with typical BC ground conditions.
The new hyperspectral imagery is now available for free download and on-line analysis with the image analysis tools contained in the Exploration Assistant map through the Ministry of Energy Mines and Petroleum Resource's MapPlace (www.mapplace.ca). Ten images ranging in length from 4.2 to 18.7 kilometers were collected over six sites: Blackdome, Gibraltar, Mt. Polley, Prosperity, Limonite (MINFILE occurrence) and the Lang Lake area. Terra Remote Sensing Inc. collected the imagery on August 1, 2007 for SpecTIR LLC using the AISA DUAL sensors. The spatial resolution of the imagery is 1.5 meters. Spectral resolution ranges from 0.9 nm to 12.6 nm and covers the electromagnetic spectrum from 0.967 -- 2.45 micromeres, providing 178 bands of information. This collection provides about 20.5 million individual spectrum.
This new hyperspectral imagery is available in either radiance or reflectance values. SpecTIR performed the atmospheric correction utilizing in-house techniques based on the ATCOR4 program. An orthorectification solution is included with each download package.
On-line analysis is available with the Image Analysis Toolbox suite of programs included in the Exploration Assistant map on the MapPlace. The hyperspectral imagery has been added to the collection of Landsat and ASTER images available for analysis through this site. As part of the project two spectral libraries, the USGS Mineral Spectral Library and the John Hopkins University Mineral Spectral Library have been integrated into the site. Spectral Angle Mapper analysis utilizing library spectrum or image spectrum is now available for both ASTER and hyperspectral imagery. A spectrum plotting feature has been added to allow plotting of library or image spectrum for various wavelength ranges and sampled to match ASTER or hyperspectral band configurations.