Impact of scale on morphological spatial pattern of forest |
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| Authors: | Katarzyna Ostapowicz Peter Vogt Kurt H Riitters Jacek Kozak Christine Estreguil |
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| Institution: | (1) Institute of Geography and Spatial Management, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland;(2) Institute for Environment and Sustainability, European Commission – DG Joint Research Centre, T.P. 261, Via E. Fermi 1, 21020 Ispra, VA, Italy;(3) Southern Research Station, USDA Forest Service, 3041 Cornwallis Road, Research Triangle Park, NC 27709, USA |
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| Abstract: | Assessing and monitoring landscape pattern structure from multi-scale land-cover maps can utilize morphological spatial pattern
analysis (MSPA), only if various influences of scale are known and taken into account. This paper lays part of the foundation
for applying MSPA analysis in landscape monitoring by quantifying scale effects on six classes of spatial patterns called:
core, edge, perforation, branch, connector and islet. Four forest maps were selected with different forest composition and configuration. The sensitivity of MSPA to scale was
studied by comparing frequencies of pattern classes in total forest area for various combinations of pixel size (P) and size
parameter (S). It was found that the quantification of forest pattern with MSPA is sensitive to scale. Differences in initial
composition and configuration influence the amount but not the general tendencies of the variations of morphological spatial
pattern (MSP) class proportions with scale. Increase of P led to data generalization resulting in either a removal of the
small size features or their potential transformation into other non-core MSP classes, while an increase of S decreases the
MSP core area and this process may transform small core areas into the MSP class islet. We established that the behavior of
the MSPA classes with changing scale can be categorized as consistent and robust scaling relations in the forms of linear,
power, or logarithmic functions over a range of scales. |
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| Keywords: | Pattern analysis Mathematical morphology Scale |
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