3D MODEL OF THE SPECTRAL SPACE OF LANDSAT IMAGES AS THE BASIS OF THE BOREAL ECOSYSTEMS GEOMATIC MODEL

DOI: 10.24057/2414-9179-2018-2-24-116-128

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About the Author

Peter Yu. Litinsky

Karelian Research Centre of the Russian Academy of Sciences,
Pushkinskaya str., 11, 185910, Petrozavodsk, Russia,
E-mail: litinsky@sampo.ru

Abstract

A new approach to the use of the Landsat images based on 3D modeling of their spectral space is described. The model is built in the x-y-z axes, where x and y are the two first principal components of the image matrix (bands R, NIR, SWIR2) in logarithmic form and z is moisture stress index MSI (SWIR1 / NIR). Empirically found transformation is more suitable for boreal ecosystems than Tasseled Cap. Segmentation of the spectral space by the method of ellipsoids provides more accurate, in comparison with traditional methods, the delineation of the ecosystem contours. It is shown that in the spectral space of images of the northern taiga subzone of Eastern Fennoscandia all the main types of biogeocenoses (complexes of Quaternary deposits + vegetation) are represented, and their localization corresponds to ecological typology. The ecological series of forest automorphic and hydromorphic ecosystems are clearly visible, as well as the trajectories of reforestation after cutting, from the appearance of vegetation to young growth, middle-aged and mature forests. For mires, the localization of spectral segments corresponds to the type of water and mineral nutrition (oligotrophic or mesotrophic). The fundamental difference between this model and those created by traditional methods is that the result is determined not by the layout of training sites, but by an objective biophysical parameter, i.e. the position of the ecosystem in the spectral space. The spectral model is a mathematically formalized object which describes the quantitative and qualitative characteristics of the ecosystems. Being deployed in geographic space, it becomes an optimal cartographic basis for planning ecologically balanced nature management for sustainable development.

Keywords

geomatic modeling, boreal ecosystems, Landsat images classification

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For citation: Litinsky P.Yu. 3D MODEL OF THE SPECTRAL SPACE OF LANDSAT IMAGES AS THE BASIS OF THE BOREAL ECOSYSTEMS GEOMATIC MODEL. Proceedings of the International conference “InterCarto. InterGIS”. 2018;24(2):116–128 DOI: 10.24057/2414-9179-2018-2-24-116-128 (in Russian)