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Snow survey and vegetation growth in high mountains (swiss alps) and additional erts investigations in switzerland
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1975 |
| Description | The author has identified the following significant results. Two different methods, an analog and a digital one, have been developed for rapid and accurate mapping of the areal extent and changes in snow cover in high mountains. The quick-look method is based on individual visual control of each image using a photo quantizer which provides exact references for density slicing with high resolution lith-film. The digital snow classification system is based on discriminant analysis with the data of the four multispectral bands as variables and contains all preprocessing, feature extraction, and mapping steps for an operational application. Two different sets of sampling groups were established which apply to different conditions of snow cover. The first one serves for the normal situation with a uniform dry and new cover. The second one serves for situations with partly thawing and/or frozen snow. |
| File Size | 2412195 |
| Page Count | 48 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750013648 |
| Archival Resource Key | ark:/13960/t87h6c817 |
| Language | English |
| Publisher Date | 1975-01-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Earth Resources Program Imaging Techniques Multispectral Photography Photointerpretation Data Processing Mapping Snow Cover Alps Mountains Europe Computer Programs Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
