Analyzing Forest Inventory Data from Geo-Located Photographs

Timo Toivanen, Renne Tergujeff, Kaj Andersson, Matthieu Molinier, Tuomas Häme

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific


    In this paper we present a tool for estimating forest inventory data from geo-located photographs. The tool can be used to estimate in-situ forest inventory data including estimated biomass, tree species, tree height and diameter. The collected in-situ forest measurements can be utilized as a ground reference material for spaceborne or airborne remote sensing data analysis. The GPS based location information with measured forest data makes it possible to introduce measurements easily as in-situ reference data. The central projection geometry of digital photographs allows the use of the relascope principle to measure the basal area of stems per area unit, a variable very closely associated with tree biomass. Relascope is applied all over the world for forest inventory. Experiments with independent ground reference data have shown that in-situ data analysed from photographs can be utilised as reference data for satellite image analysis. The concept was validated by comparing mobile measurements with 54 independent ground reference plots from the Hyytiälä forest research station in Finland.
    Original languageEnglish
    Title of host publicationGeophysical Research Abstracts
    Publication statusPublished - 2015
    EventEuropean Geosciences Union General Assembly 2015 - Vienna, Australia
    Duration: 12 Apr 201517 Apr 2015


    ConferenceEuropean Geosciences Union General Assembly 2015


    • citizen science
    • participatory sensing
    • forest biomass
    • basal area
    • satellite imagery
    • mobile phone


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