To reveal and predict the processes having negative impact on geo-ecological state of forest fund quality, since 2005 Federal Agency of Forestry organized works on continuous control on state and changes of the forest fund of Russian Federation which possesses the quarter of all forests in the world. Now it is practically impossible to control and monitor taxation and contour changes in the composition of forest fund without using up-to-date methods and latest achievements in remote sensing of the Earth. The data of remote sensing are the carrier for registered information of the qualitative state of forest fund. Forest mapping is connected with great data arrays due to vast areas and necessity for their qualitative characteristics. For such purposes the remote sensing is wide used which allows automating the process of survey and data processing. The survey may be done in different spectrum bands depending on original conditions for measuring and required results, which have a direct influence on cameral processing of obtained materials. The article considers some specifics of methodical approach for interpreting the data of aero- and cosmic techniques for studying the lands of forest fund for further thematic mapping. At the present time the principle of quantitative approach is considered as the most promising. The development of this principle will provide the increasing of efficiency for aims and objectives of thematic mapping and find a wide use in applied mapping for studying of world forest resources.
Keywords: remote sensing of the Earth, space image, thematic decoding, quantitative approach.
