Uso e ocupação da terra no Projeto de Assentamento Agroextrativista Praialta Piranheira - Nova Ipixuna através de imagens de satélite

Abstract

This work was accomplished in Projeto de Assentamento Agroextrativista (PAE) Praialta Piranheira. Inserted in the southeast area of Pará state, PAE Praialta Piranheira is located on the district of Nova Ipixuna This area corresponds to 22,000 hectares distributed for approximately 500 famílias. The objective of this work is evaluate spatial use of dynamics and occupation's land of PAE since 1997 to 2006. Whatever, the use of satellite images LANDSAT for processing and obtaining live thematic maps of use and occupation's land to respective years: 1997, 2000, 2002, 2004 and 2006. It was also used a GPS equipment (Global Positioning System) to accomplish the Held verification and to identify the ways of access. The data were systematized and added to a GIS environment (Geographical Information System) using the software ArcGIS 9.0 (Esri©) on Laboratório Sócio Agronômico do Tocantins - LASAT. The identified classes are: Forest, Capoeira/Pasture, Exposed Soil, Bumed Soil, Water, Cloud/Shade and Wood Extraction Activity. The results revealed that the forest decreases to a medium rate of 86% every two yeaxs following a dynamics of conversion of the forest in culturas (mainly rise plantation) and pasture. The methodology for mapping the use and occupation's land indicates an efficient to obtaining the rates of deforestations.