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

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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:: SATELLITE IMAGE-BASED NATIONAL FOREST INVENTORY OF FINLAND. Erkki Tomppo

Document type:: Multivolume work

Structure type:: Chapter

SATELLITE IMAGE-BASED NATIONAL FOREST INVENTORY OF FINLAND ISPRS, COMISSION VII, Mid-Term Symposium Global and Environmental Monitoring, Techniques and Impacts September 17-21, 1990 Victoria, British Columbia Canada Erkki Tomppo The Finnish Forest Research Institute Unioninkatu 40 A SF-00170 Helsinki, Finland 1. INTRODUCTION The National Forest Survey (NFI) data of Finland has been based until today on field measurements only. Systematic cluster sampling has been applied in the last four inventories in Southern Finland. It has been considered generally that the area for which the results can be computed reliably enough is about 150 000 ha. The inventory of the whole country takes about 10 years. This implies that a part of the data concerning the amount of growing stock and the level of growth is out of date all the time. Other drawbacks of the recent inventory are: 1) cutting and mortality can not be estimated reliably enough by means of the temporary sample plots; 2) diseases and damages can not be detected continuously; 3) time variation of the growth can not be estimated reliably in different, regions of the country; and 4) results are not in an easy form to use by other organizations. Using ground measurements only to remove these drawbacks and to get localized information is too expensive. Therefore, The Forest Research Institute has started to develop a new inventory system. The method exploits satellite image data and digital map data as well as other geographical data, for example, meteorological data as well as ground measurements. 2. DATA 2.1. Satellite image data The possible image data are at this moment Landsat TM and Spot images (and MOS-1 images). Of these, TM will be used in the first phase. The reasons are: 1) One TM scene covers a larger area (about 180A’m x 1800??) than a Spot image (fiOAm? x fi()A*m ). This is of importance at the beginning, when a reliable image calibration system is not available. This makes it also more possible to obtain clomlfree images covering the whole country. 2) I'lie price of TM data is about 0.01 Fmk/ha compared with 0.025 Fmk/ha of Spot -data. However, according to our hypothesis, the best results would be obtained if both TM and Spot imagery could be used because of t he better spatial resolution of Spot. This approach will be used after the computer capacity of The Institute becomes large enough. The satellite images will be rectified with a pixel size of 25m x 25m to the base map coordinate system. 419

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