Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Multivolume work

Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [WP-3 FOREST INVENTORY APPLICATIONS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: ANNUAL COUNTRY WIDE FOREST MONITORING IN SWEDEN: A PRELIMINARY ASSESSMENT OF REQUIREMENTS FOR THE WIDE-SCALE INTRODUCTION OF REMOTE SENSING IN SWEDEN'S NATIONAL FOREST INVENTORY. Randall Thomas, Bo Ranneby

Document type:: Multivolume work

Structure type:: Chapter

spectrally-bascd detection, but not necessarily identification, of areas or stands containing damage of some type (Olsson 1990 and personal communication). Workers (e.g., Wastenson and others, 1987) have not been able to use these data to consistently detect or identify trees exhibiting substantial needle loss. This result is due to the fact that affected trees tend to occur singly and not in groups. Ekstrand's (1988) work with Norway spruce in Sweden suggests that use of a geographic information system containing current stand histories and other ancillary information in digital form could enable satellite-based detection of significant needle loss in certain terrain and species mix situations. We have concluded that, beyond the aerial photography applications mentioned above, significant additional research with both satellite and aerially acquired data will be required before additional types of forest damage can be detected and then reliably separated from one another using this technology in Sweden. FINDINGS: COVER TYPE AND COVER TYPE CHANGE Clear-Felled Area With respect to cover type area and area change estimation, the range of near-term applications of remote sensing data are larger. Clear-felled areas, given late Spring and Summer Landsat or SPOT satellite data, are readily detectable and identifiable in most situations found in Sweden using technology available now (e.g., Jaakkola and Hagner 1988, Hame 1988, Boresjo 1989, and Olsson and Sohlberg 1989). Jaakkola and Hagner, for example, showed that digital Landsat TM and SPOT XS scenes from different dates could be used to accurately detect and map clear-felled areas down to 0.5 hectare or less in sizx. Olsson and Sohlberg (1989) used two spatially registered scenes of SPOT-P digital data (from succeeding years) to reliably map clear-felled areas as small as 0.2 hectare over ten 5 by 5 kilometer areas in south-central Sweden. The difference between the ground surveyed clear-felled area and that obtained from interpretation of the digital image was approximately 3 percent — a figure which could be reduced further by tuning the procedure (Olsson, personal communication). Thus, use of remote sensing for clear-felled area estimation is considered a strong candidate for early test and evaluation in the Swedish NFI. Forest Cover Area Mapping/Estimation The next most-developed satellite survey capability of this type is general forest cover type mapping and estimation. Jonasson (1987), Jaakkola (1987), Hame (1988), Boresjo (1989), and Hagner (1989), among others, have shown that cover type, certain cutting classes, and other vegetation or surface- related information for Scandinavian conditions is available through the use of Landsat TM and SPOT data. Jaakkola and others (1988) present a summary of key findings for Landsat TM data in this regard for forestry over a broader area in Europe. Medium scale (typically 1:30,000, panchromatic) aerial photography for forest type, age, volume, and site class mapping is presently being used by at least one government group in Sweden (e.g., Age, 1985). 410

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