Subpixel Land Use Classification and Retrieval of Forest Stem Volume in the Boreal Forest Zone by Employing SSM/I Data
✍ Scribed by Jochen Grandell; Jouni Pulliainen; Martti Hallikainen
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 909 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0034-4257
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✦ Synopsis
The use of microwave radiometry for the retrieval of land areas are systematically different (subgroups of boreal forests). The results show that the methods are applicable use distribution (subpixel proportions) and forest stem volume for 25 km and 50 km pixels is investigated, with new to remote areas with less training data. This is especially true for the stem volume estimation and limited (two or algorithms introduced for the spaceborne multichannel SSM/I instrument. The test sites are located in the boreal three classes) subpixel land use classification. These can be considered as promising results for a coarse resolution, forest zone in Finland. SSM/I data from snow-free periods (from May to September) are used in the study, to-high-frequency microwave instrument such as the SSM/I. ©Elsevier Science Inc., 1998 gether with a digital high-resolution land use map as reference data. A stepwise algorithm is developed, in which the surface emissivity is estimated for each of the pixels in the first stage of the algorithm. By using a training