Abstract
The seasonal variation of intensities in SAR images is typically higher on agricultural fields than in forests. Therefore multitemporal use of SAR data enables the distinction of fields and forests [1, 2]. Single SAR images are not as easy to use for forest mapping, although at certain times of the season the intensities of the fields and forests are clearly different. Due to the speckle direct classification is usually not succesful. Moreover, the modest resolution of ERS SAR makes reliable forest detection even more difficult [2]. Recently a method for distinguishing boreal forests and open land areas using single ERS images has been developed [3]. For boreal forests an unsupervised classification method utilizing Landsat TM data has been used in several contexts lately [4, 5]. The method is based on clusters labeled using their reflectance values. The ERS SAR single image forest/nonforest classification results are compared in this paper with the Landsat TM classification results in two test sites in Southern Finland.
Original language | English |
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Title of host publication | Second International Workshop on Retrieval of Bio- & Geo-physical Parameters from SAR Data for Land Applications |
Place of Publication | The Netherlands |
Publisher | European Space Agency (ESA) |
Pages | 347-354 |
Volume | SP-441 |
ISBN (Print) | 92-9092-764-X |
Publication status | Published - 1998 |
MoE publication type | Not Eligible |
Event | 2nd ESA International Workshop on Retrieval of Bio- and Geo-physical Parameters from SAR Data for Land Applications - Noordwijk, Netherlands Duration: 21 Oct 1998 → 23 Oct 1998 Conference number: 2 |
Conference
Conference | 2nd ESA International Workshop on Retrieval of Bio- and Geo-physical Parameters from SAR Data for Land Applications |
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Country/Territory | Netherlands |
City | Noordwijk |
Period | 21/10/98 → 23/10/98 |