Field campaign 2009 - Hyytiälä. Aims 1) Fully mapped understory tree layers, 2-3 sites, preferably with variation in site fertility and/or upper tree layer. To investigate LiDAR data in the assessment of density and species admixture in the understory layer.
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1) Fully mapped understory tree layers, 2-3 sites, preferably with variation in site fertility and/or upper tree layer.
To investigate LiDAR data in the assessment of density and species admixture in the understory layer.
2) Collect data on tree growth, bore corer (ir5a(2004-2008)) and dbh, above bark id(200#-2009). To see if LiDAR features explain intertree variation in ig.
3) To add trees in the experiment utilizing the students’ workforce. To support species classification research efforts in LiDAR and image data.
June 15 Sept 15 Pauliina Aarne in Hyytiälä
June Aug IK in Hyytiälä, 18 days, Office preparations 6 daysSept Oct Putting database in orderBLOG: http://evoliitti.blogit.fi/
Costs: ca. 28000 €, excl. marv1-teachers, salary + travel + accommodation. UH ~ 75%, UJ ~ 25%.
MARV1 5 plots, 2.68 ha, 3090 trees 1072 triangulated positions, 640 h/hc obs
Understory 2 plots, 6060 m and 30100 m,5 m bufferMapping Upper layer ~220 + 180: dbh, h, hc, irLower layer ~2100 + 1500 trees: xy, sp, h
Old plots P1,P2,P3,P4,P6; 5050 m, 52 yrs. Pine. Tallying + sample tree sub-plot with 50 dominant –co-dominant trees (h/hc/ir). In total ~ 2050 trees. Previous 2002. LK1, LK2, 50x50-m, 100-yr-old, pine, barren dbh, h, hc, ir in all trees. In total 200 trees. Previous 2002.
Texas – pine – spruce plot. 40 x 100 m. 60-yr. h in 33%, hc and ir in 100% trees | hrel > 0.5425 trees. Previous 2005.
FT/KM, pine – spruce, r = 22 m. 40 yr. h, hc, ir in all trees. In total 250 trees. Previous 2002. TELE – pine-spruce-alder-birch, 40 yrs. h/hc 33% of trees. NO ir data.400 trees, Previous 2005. S1, S2, S3, S4, S5, S6 Spruce plots, 55 yrs. Tallying only. 2100 trees. Previous 2002. B1, B2, B3, B4. Birch plots. 450 trees. 2010.
Quality issuesMay 2009; simulation says 15-cm xy-accuracy in understory mapping is possible using the tape-method. Exterior orientation. Strip level, between strip and block level accuracy. Evaluated continuously.
Re-measurements in dbh, h/hc, irSome problems with the older data, mostly coherent. dbh accuracy 2-3 mm, h ~ 0.3 m, hc ~ 0.8 mSystem calibration with Vertex and other eq.?