Metsän muutosten spektrinen tulkinta satelliittikeilainkuvien avulla

Translated title of the contribution: Spectral interpretation of changes in forest using satellite scanner images

    Research output: Book/ReportBook (author)peer-review

    Abstract

    A study was made of the spectral characteristics of sudden changes occurring in a 40x40 km forest in S. Finland in 1984-87 using satellite scanner images (Landsat Thematic Mapper and Spot images and spectroradiometer measurements). Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) were the most common tree species. The changes were (1) clear felling, (2) selective thinning, (3) site preparation on clear felled areas, (4) weeding of deciduous shrubs and/or thinning of conifer seedling regeneration, (5) damage caused by the fungus Gremmeniella abietina and (6) deciduous shrub growth in regeneration areas. A computer model of spectral characteristics was developed and compared with the empirical data. G. abietina damage increased the reflectance in the visible part of the light spectrum and decreased the reflectance in the rear infrared part. Near infrared reflectance was reduced after thinning. A system for automated monitoring of changes is presented.
    Translated title of the contributionSpectral interpretation of changes in forest using satellite scanner images
    Original languageFinnish
    Number of pages111
    Publication statusPublished - 1991
    MoE publication typeC1 Separate scientific books

    Publication series

    SeriesActa forestalia Fennica
    Volume222
    ISSN0001-5636

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