Application of GIS RS in Survey and Mapping of Joint Forest Management (JFM) Areas in Orissa Forestry Sector Development Project - A Scientific Approach

摘要

The overall objective of the project is to restore degraded forests and improve the income level of villagers by promoting sustainable forest management including Joint Forest Management (JFM) plantation and community/tribal development, with larger goals of improving environment and allevi ating poverty. Current vegetation and land use map has been prepared with GIS technology using satellite imagery (LISS - III), at a scale of 1:50, 000 showing degraded forest area in the divisions. DGPS device has been used for boundary survey of JFM sites. Base maps of the JFM areas are prepared in 1: 5000 scale with adequate control network established through DGPS survey. High resolution satellite imagery (2.5 m resolution cartosat b/w data and 6.5m resolu tion LISS IV multi -spectral data) are being used for extraction of ground features including vegetation status. The satellite imageries were provisionally rectified (geo - referenced) based on control points identified on Survey of India topographic maps. Satellite Imageries were interpreted within the AOI for visible features such as roads, tracks, railway lines, vegetations, river, streams, water bodies, settlements, etc. Pre-field maps were certified by the DMUs to proceed further with the field survey work. Ground truth maps (rectified image prints) with certain interpreted features were provided to the survey team for conducting the field survey. Details of vegetation in the JFM sites were collected during the field survey. Information on forest class, forest type, crop composition, age class, regeneration status, root stock and soil type and condition were recorded during the vegetation survey. Based on the above standard, thematic mapping was carried out in Arc GIS and layers were organized with their corresponding attributes. Final maps (base map, fore st map, land use map) of each treatment were prepared and verified. The maps are being used in forest based micro planning for future monitoring and evaluation of the project component.