Aiming at the current situation of statistical analysis of geographical conditions, most of them are limited to basic statistics, comprehensive statistical analysis index system and technical methods have not yet established a unified standard of the status quo, based on the geographical conditions of the follow-up to deepen the application of practical needs, put forward a set of regional geography comprehensive Statistical analysis and evaluation of the framework of the program, on the basis of the Pearl River Delta Economic Zone for the object to carry out the relevant applications. The framework can reveal the interaction and influence of regional resources, ecology, population, economy, society and other elements in the geographical space from the aspects of resource utilization, ecological civilization, social livelihood, urbanization and so on. Which can provide technical reference for the comprehensive statistical analysis work of other different units and provide new ideas for the further application of geo-national census evaluation and monitoring.
Remote sensing technology has great advantages for fire detection, meanwhile, many studies neglect the contribution of small fires which appear burned area and time uncertainly. Crop residue burning is a kind of biomass burning, and a kind of small fires as well. So far, no matter the satellite remote sensing data or detecting algorithms that cannot meet monitoring requirements of crop residue burning. It is difficult to detect and monitor. In this paper, using MODIS burned area product and active fire product, the burned area detection algorithm of crop residue burning was developed, and then, took a test in the Yangtze River Delta. Results show that developed detection algorithm not only detect crop residue burning well, but also estimate the burned area. This study about small fires has obvious progress compared with other fire detection methods.
Regular monitoring and assessment on radiometric performance of satellite sensors is necessary for the quantitative remote sensing application and development. HJ satellite was launched by China on 2008, which was put forward to achieve dynamic monitoring of environment and disasters, also need to monitor radiometric performance and provide stable and reliable calibration coefficients timely. In this study, Terra/MODIS data were used to calibrate HJ-1A CCD camera by cross-calibration technique in Dunhuang radiometric calibration site. Total thirteen HJ -1A CCD images were utilized, the 6s model was used to estimate the spectral matching factors. Finally, this study obtains long-term HJ-1A CCD calibration coefficients from 2009 to 2012. Results show that each band of HJ-1A CCD is varying degrees of degradation after HJ satellites launched 5 years later. This study is helpful to obtain high accuracy and reliable calibration coefficients and monitor radiometric performance of HJ-1A CCD.
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