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

which error reduction and more localized estimates are desired through this approach include the following: (1) forest area clear-felled annually; (2) forest area thinned on an annual basis and to what degree thinned; (3) area by forest type (for the NFI, these types are defined in terms of dominant tree species, relative stocking density, and tree size); (4) change or exchange of forest area, on an annual basis, in or with other than traditional forest land classes, including agricultural land, wetlands, mountains, and national park land; (5) forest area, on an annual basis, associated with given degrees of regeneration success; and (6) forest area damaged annually by diseases and pests. The Department of Forest Survey has grouped the six estimation areas listed above into two categories: (1) remote sensing-aided estimation for environmental monitoring (which includes the sixth estimation objective), and (2) remote sensing for cover type area and cover type area change (which includes the first Five estimation objectives). Environmental monitoring, while a technically more difficult problem from the remote sensing standpoint, has recently been given a slightly higher priority by the Department. Another important objective of introducing remote sensing in the Swedish NFI is to provide a data type that can enable the effective use of forest industry sample plot data with NFI plot data. This will enable further error reduction, particularly at the local level, and perhaps expand the kinds of estimates available. The use of satellite-acquired digital data will also result in the availability of data files containing spatial information. These files can consist of category maps, aggregatablc into different class structures according to NFI or other user needs. FINDINGS: ENVIRONMENTAL MONITORING (TREE DAMAGE) Focus on environmental monitoring in this review has been directed to the problem of forest tree disease and pest detection and identification. With respect to this problem, some specific applications of aerial photography for mapping or counting affected trees for a few types of damage could be adapted for use in the NFI in the near future. These include the present operational use in Sweden of large (approximately 1:2000) scale color infrared photography for Norway spruce (Picea abies) and Scotch pine (Pinus Sylvestris) needle loss surveys (e.g., Hedlund and Jacobson, 1988, Sylvander 1987). Abnormal needle loss is thought to be related to acid rain damage in many cases. Based on a study reported by Sylvander (1989), use could be made of the same type of photography for inventorying, on a sample basis, Gremmeniella abietina fungi damages. Color aerial photography of somewhat smaller scale is now being used by private companies in Sweden to locate and assess blow-down damage. Satellite applications, with the following exception, arc not expected to be reliable for application in the near future in the Swedish forest context. The exception is the possible use of Landsat TM and SPOT data to enable

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