Research on “beijing 1” Micro-satellite Image Quality and Land Use Classification Precision

“Beijing 1” is one Micro-satellite of the international Disaster Monitoring Constellation (DMC). It was launched successfully in 2005, and has high-powered characteristic, such as high gaining data ability, high storage ability, high space resolution, high time resolution and low cost. At present it is necessary to make objective appraisal for image quality and application potential in different research field in order to provide beneficial reference for the satellite future design and application. In China, LUCC space-time database construction is one important domain in remote sensing technology application field, and mainly relied on foreign commercial satellite. Now “Beijing 1” Micro-satellite Image can be one kind of new data source. This paper taking LUCC as the application object, Researched on “Beijing 1” Micro-satellite multi-spectra Image Quality and Land Use Classification Precision. The main content and research method in the paper as followed: Image quality was studied through analyzing visual quality, spectrum characteristic and geometry correction precision. land use classification precision was studied through selecting characteristic variable, optimizing training sample and establishing classification template, constructing three different methods “Maximum Likelihood, Minimum Distance and Mahalanobis Distance” to make land use classification and appraise the classification precision. The research results show that: “Beijing 1” image has rich spectrum information, clear texture structure and good geometry performance. Image quality is fine and land use classification precision is high. Image can satisfy medium scale map request, can be widespread used in land use field and become the main data source that remote sensing data renews in land use research. * Corresponding author. 1. INSTRUCTIONS “Beijing 1” is one Micro-satellite of the international Disaster Monitoring Constellation (DMC). It was launched successfully On October 27, 2005, and had high-powered characteristic, such as high gaining ability, high storage ability, high space resolution, high time resolution and low cost. “Beijing 1” Micro-satellite could gain multi-spectra data with 32 meter resolution and 600km×600km scan areas, at the same time, it could gain panchromatic images with 4 meter resolution and 24km×24km scan areas. After the entire DMC began to run, everyday it can provide the remote sensing images for any place in the world. “Beijing 1” Micro-satellite had important scientific value. It would change the history that China mainly depended on the foreign satellite remote sensing data. At present it is necessary to make objective appraisal for image quality and application potential in different research field in order to provide beneficial reference for the satellite future design and application. In China, LUCC space-time database construction is one important domain in remote sensing technology application field. In the past, LUCC space-time database construction in China mainly relied on foreign commercial satellite (LANDSAT). But now TM data source was in the unstable condition now. Therefore, searching one new data source had been one urgent duty. “Beijing 1” Micro-satellite Image can be one kind of new data source. So this paper taking LUCC as the application object, researched on “Beijing 1” Micro-satellite multi-spectra Image Quality and Land Use Classification Precision, aiming to accumulate experience for more application in difference field in future. 2. EXPLANATION OF METHODS 2.1 Data used In the research, “Beijing 1” CCD data provided by Chinese 21st Century Spatial Technology Application Company was used. Data was received on November 14, 2005. Three wave bands respectively were 0.52 0.62μm (green), 0.63 0.69μm, (red), 0.76 0.90μm (near-infrared).The image cover scope was broad, including Beijing, Shijiazhuang and Tianjin. The northeast and northwest were mountainous areas, the southeast was Bohai Sea, and Beijing was located in the middle of image. Table 1 described other information about this image. DataName Resolution Document size “Beijing 1” 32meter 794.49cm×562.61cm Data capability Format Element 1.00GB TIF 22521×15948 element Tab.1 Detailed situation of “Beijing 1” CCD data used in study