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  • 1
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    Use of SAR in regional methane exchange studies (1994)
    Taylor & Francis
    Details
    Publication Date: 1994-04-01
    Print ISSN: 0143-1161
    Electronic ISSN: 1366-5901
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Taylor & Francis
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    PAPER CURRENT
  • 2
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    Classification of radar imagery over boreal regions for methane exchange studies (1996)
    Taylor & Francis
    Details
    Publication Date: 1996-04-01
    Print ISSN: 0143-1161
    Electronic ISSN: 1366-5901
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Taylor & Francis
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    PAPER CURRENT
  • 3
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    Methane emissions from Alaska Arctic tundra: An assessment of local spatial variability (1992)
    American Geophysical Union
    Details
    Publication Date: 1992-01-01
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
    Published by American Geophysical Union
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  • 4
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    Statistical analysis of Thematic Mapper Simulator data for the geobotanical discrimination of rock types in southwest Oregon (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: An evaluation of Thematic Mapper Simulator (TMS) data for the geobotanical discrimination of rock types based on vegetative cover characteristics is addressed in this research. A methodology for accomplishing this evaluation utilizing univariate and multivariate techniques is presented. TMS data acquired with a Daedalus DEI-1260 multispectral scanner were integrated with vegetation and geologic information for subsequent statistical analyses, which included a chi-square test, an analysis of variance, stepwise discriminant analysis, and Duncan's multiple range test. Results indicate that ultramafic rock types are spectrally separable from nonultramafics based on vegetative cover through the use of statistical analyses.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892); GE-22; 525-530
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Geobotanical discrimination of ultramafic parent materials An evaluation of remote sensing techniques (1984)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Color and color infrared aerial photography and imagery acquired from a Daedalus DEI-1260 multispectral airborne scanner were employed in an investigation to discriminate ultramafic rock types in a test site in southwest Oregon. An analysis of the relationships between vegetation characteristics and parent materials was performed using a vegetation classification and map developed for the project, lithologic information derived from published geologic maps of the region, and terrain information gathered in the field. Several analytical methods, including visual image analysis, band ratioing, principal components analysis, and contrast enhancement and subsequent color composite generation were used in the investigation. There was a close correspondence between vegetation types and major rock types. These were readily discriminated by the remote sensing techniques. It was found that ultramafic rock types were separable from non-ultramafic rock types and serpentine was distinguishable from non-serpentinized peridotite. Further investigations involving spectroradiometric and digital classification techniques are being performed to further identify rock types and to discriminate chromium and nickel-bearing rock types.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Mapping permafrost in the boreal forest with Thematic Mapper satellite data (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A geographic data base incorporating Landsat TM data was used to develop and evaluate logistic discriminant functions for predicting the distribution of permafrost in a boreal forest watershed. The data base included both satellite-derived information and ancillary map data. Five permafrost classifications were developed from a stratified random sample of the data base and evaluated by comparison with a photo-interpreted permafrost map using contingency table analysis and soil temperatures recorded at sites within the watershed. A classification using a TM thermal band and a TM-derived vegetation map as independent variables yielded the highest mapping accuracy for all permafrost categories.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: Photogrammetric Engineering and Remote Sensing (ISSN 0099-1112); 52; 1513-152
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    An evaluation of thematic mapper simulator data for the geobotanical discrimination of rock types in Southwest Oregon (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Rock type identification may be assisted by the use of remote sensing of associated vegetation, particularly in areas of dense vegetative cover where surface materials are not imaged directly by the sensor. The geobotanical discrimination of ultramafic parent materials was investigated and analytical techniques for lithologic mapping and mineral exploration were developed. The utility of remotely sensed data to discriminate vegetation types associated with ultramafic parent materials in a study area in southwest Oregon were evaluated. A number of specific objectives were identified, which include: (1) establishment of the association between vegetation and rock types; (2) examination of the spectral separability of vegetation types associated with rock types; (3) determination of the contribution of each TMS band for discriminating vegetation associated with rock types and (4) comparison of analytical techniques for spectrally classifying vegetation.
    Keywords: GEOSCIENCES (GENERAL)
    Type: NASA-CR-166569 , NAS 1.26:166569
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Analysis of the Tanana River Basin using LANDSAT data (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Digital image classification techniques were used to classify land cover/resource information in the Tanana River Basin of Alaska. Portions of four scenes of LANDSAT digital data were analyzed using computer systems at Ames Research Center in an unsupervised approach to derive cluster statistics. The spectral classes were identified using the IDIMS display and color infrared photography. Classification errors were corrected using stratification procedures. The classification scheme resulted in the following eleven categories; sedimented/shallow water, clear/deep water, coniferous forest, mixed forest, deciduous forest, shrub and grass, bog, alpine tundra, barrens, snow and ice, and cultural features. Color coded maps and acreage summaries of the major land cover categories were generated for selected USGS quadrangles (1:250,000) which lie within the drainage basin. The project was completed within six months.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10163 , NASA-CR-166393 , NAS 1.26:166393
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Integrated resource inventory for southcentral Alaska (INTRISCA) (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Integrated Resource Inventory for Southcentral Alaska (INTRISCA) Project comprised an integrated set of activities related to the land use planning and resource management requirements of the participating agencies within the southcentral region of Alaska. One subproject involved generating a region-wide land cover inventory of use to all participating agencies. Toward this end, participants first obtained a broad overview of the entire region and identified reasonable expectations of a LANDSAT-based land cover inventory through evaluation of an earlier classification generated during the Alaska Water Level B Study. Classification of more recent LANDSAT data was then undertaken by INTRISCA participants. The latter classification produced a land cover data set that was more specifically related to individual agency needs, concurrently providing a comprehensive training experience for Alaska agency personnel. Other subprojects employed multi-level analysis techniques ranging from refinement of the region-wide classification and photointerpretation, to digital edge enhancement and integration of land cover data into a geographic information system (GIS).
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-166514 , NAS 1.26:166514
    Format: application/pdf
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  • 10
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    Forestry timber typing. Tanana demonstration project, Alaska ASVT (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The feasibility of using LANDSAT digital data in conjunction with topographic data to delineate commercial forests by stand size and crown closure in the Tanana River basin of Alaska was tested. A modified clustering approach using two LANDSAT dates to generate an initial forest type classification was then refined with topographic data. To further demonstrate the ability of remotely sensed data in a fire protection planning framework, the timber type data were subsequently integrated with terrain information to generate a fire hazard map of the study area. This map provides valuable assistance in initial attack planning, determining equipment accessibility, and fire growth modeling. The resulting data sets were incorporated into the Alaska Department of Natural Resources geographic information system for subsequent utilization.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E83-10162 , NASA-CR-166391 , NAS 1.26:166391
    Format: application/pdf
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