Method for detecting sub-compartment forest resource by remote sensing and geographical information system technology

Abstract

The invention discloses a method for detecting whether a sub-compartment forest resource changes or not by a remote sensing and geographical information system technology. The method comprises the following steps that a remote sensing image of the forest resource is obtained and preprocessed, the remote sensing image obtained after preprocessing is overlapped with position vector data, stored in advance, of sub compartments, and a remote sensing image forest map is generated; characteristic data of each sub compartment in the remote sensing image forest map is compared with attribute data of the corresponding sub component in a forest resource database, and whether the attribute data of each sub compartment are changed or not is judged, wherein the attribute data comprise land types, dominant tree species, canopy density, the age of forest, the amount of growing stock and the number of trees; if the attribute data of a certain sub compartment is changed, the serial number of the sub compartment with the attribute data changed and the changed attribute data are obtained. Forest resource change is recorded according to the sub compartments, so that operating activities of the sub compartments reported by a township forest operating station are effectively verified, false reporting and failure reporting are avoided, and the purpose of enhancing forest resource management is achieved.

Description

technical field [0001] The invention relates to the field of forestry resources, in particular to a method for detecting changes in forestry resources in small groups by using remote sensing technology and geographic information system technology. Background technique [0002] Since the launch of the US Earth Resources Satellite in 1972, with the development of remote sensing technology, the application of remote sensing technology in forest resources investigation has made great progress. At present, the application of remote sensing technology in forestry is mainly for forest zoning, different types of forest area monitoring, natural disaster monitoring, forest stock volume estimation, etc. [0003] In the county-level forest resources management, the management object is the small class, and the forest resource data will change due to the various management activities of the small class and the acquisition and occupation of forest land. The managers of the forestry depart...

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Problems solved by technology

[0006] (1) The changed forest resource data cannot be assigned to sub-compartments, and the forestry management department cannot timely understand and verify the changes in those sub-compartments, which cannot meet the requirements of forest resources at the county level to be managed according to sub-compartments;

[0007] (2) The changed sub-class data cannot be obtained, and the monitored data cannot be used to update the sub-class data in the forest resource database

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