SIG uso do EARTH para Planejamento Ambiental

próximo artigo Anais XIV Simpósio Brasileiro de Sensoriamento Remoto, Natal, Brasil, 25-30 abril 2009, INPE, p. 1835-1842.

Imagens do Google Earth para fins de planejamento ambiental: uma análise de exatidão para o município de São Leopoldo/RS
Marcelo Zagonel de Oliveira 1
Maurício Roberto Veronez 1
Marcos Turani 1
Alessandro Ott Reinhardt 1
1

Universidade do Vale do Rio dos Sinos – UNISINOS
Laboratório de Sensoriamento Remoto e Cartografia Digital - LASERCA
Programa de Pós-Graduação em Geologia
Av. Unisinos, 950 - CEP. 93022-000 – São Leopoldo - RS, Brasil
{veronez, maturani}@unisinos.br
Abstract: Google Earth provides free satellite images to people who have access to the internet. In many places these images have high resolution and might be used in many activities of urban and environmental planning.
The purpose of this study was to analyze the Standards of Cartographic Accuracy - SCA of a mosaic made from scenes with high resolution provided by Google Earth. The scenes were captured at 5900 meters of altitude referring to the city of San Leopoldo / RS. The analysis of SCA was based on a network of 30 GPS points located in the municipality and with a maximum horizontal error of 0.06 meters gotten after adjustment by the method of least-squares. Of the 30 vertices, 17 were used for georeferencing the image and 13 to study the SCA.
Statistical tests were applied to analyze the quality of the georeferenced image and according to the classification of Decree Law 89,817 – Standards of Cartographic Accuracy – was possible to conclude that the image of
Google Earth developed through scenes captured at 5900 meters of altitude can be defined as Class B and used with a scale of 1/15.000.
Palavras-chave: Standards of Cartographic Accuracy, Google Earth images, GPS network.

1. Introdução
Nos últimos anos, o processo de urbanização é acompanhado por profundas alterações no uso e na ocupação do solo, que resultam em impactos ambientais nas bacias hidrográficas. As