Chang X.,State Key Laboratory of Information Engineering in Surveying |
Wang M.,State Key Laboratory of Information Engineering in Surveying |
Fang L.,State Key Laboratory of Information Engineering in Surveying |
Hu F.,National Administration of Surveying
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2014
This paper analyzes the characteristics of the ground remote sensing satellite data pre-processing system and proposes an approach to encapsulate the processing steps into plug-ins with the idea of separating the satellite data processing business with the underlying algorithms. Then the data processing chain is organized to construct the ground multi-satellite/sensor data pre-processing system. This technology has been used by ground pre-processing systems of China resources satellites (ZY1-02C, ZY3). © 2014 IEEE.
Li Z.,National Administration of Surveying
Journal of Geomatics | Year: 2015
The national geographic information public service platform Map World is widely used and has generated a huge social and economic benefits. The object of building Map World was to create a national strategic information basic platform as requested by National Administration of Surveying, Mapping and Geoinformation (NASMG). This paper describes the progress of Map World and analyzes the opportunities and challenges that the New Normal national economic development places on it. This paper proposes a Map World big data center and a high performance service site for high parallel global access that extends functionality under new conditions. The proposed improvements could increase the public benefits and encourage marketing application development.
Chen J.,National Administration of Surveying
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | Year: 2012
Geographic national condition is the spatial and viewable national conditions. Geographic national condition is to study, analyze and describe national conditions in the view of geography, is to reflect natural, economic and humanistic situations of a state. Geographic national conditions monitoring is necessary for scientifically managing the macro-control of national economy. Surveying, Mapping and Geoinformation Department is a department for obtaining, processing, managing and providing the information of geographic national condition. The Department should organize and construct scientific monitoring system of geographic national condition. Besides, integrating needs of national big project, major strategic, emergencies and macro-management needs, the Department should also provide objective and continuous geographic national conditions information.
Liu Z.,University of Heidelberg |
Menzel L.,University of Heidelberg |
Dong C.,University of Heidelberg |
Fang R.,National Administration of Surveying
International Journal of Climatology | Year: 2015
An investigation of temporal dynamics and spatial patterns of dryness/wetness conditions over the eastern part of Northwest China (including Shaanxi, Ningxia, the eastern part of Gansu, and a part of southern Inner Mongolia) during the period 1960-2009 is presented. The analysis of this study is threefold. First, the dryness/wetness conditions over the study area were characterized using the self-calibrating Palmer Drought Severity Index (PDSI). The spatiotemporal variability of dryness/wetness conditions in the study area was then investigated by the rotated empirical orthogonal function (REOF) and Mann-Kendall trend test. Third, we examined the periodical oscillations of dryness/wetness conditions and the multi-scale relationships between dryness/wetness conditions and El Niño-Southern Oscillation (ENSO). The results indicate that most parts of the study area were characterized by a dry trend in both the rainy season (May-September) and winter. Four sub-regions of dryness/wetness conditions across the study area were identified. Based on the wavelet analysis, the periodical features in the PDSI time series for each sub-region were explored. Negative relationships between the PDSI in the sub-region I (representing the central and southern parts of Shaanxi and the southeastern Gansu) and the Niño 3.4 index can be consistently detected on 2-6 year scales during the entire period 1960-2009. This suggests that the strong El Niño events generally lead to very dry conditions in the sub-region I on multi-year scales. In addition, we further investigated how the ENSO cycle modulates the strength of the East Asian summer monsoon (EASM) in both developing and decaying phases of El Niño and La Niña events. The results of this study could be beneficial for efficient water resources management and drought assessment in the current study area and also provide a valuable reference for other areas with similar climatic characteristics. © 2015 Royal Meteorological Society.
Li P.,National Administration of Surveying
Journal of Geomatics | Year: 2014
This paper, starting from the strategic objective of developing Geospatial Framework for Smart China, introduces the basic connotation and structure of the Geospatial framework for Smart China. It analyses the contents that need to be improved on the basis of the achievements with the Geospatial Framework for Digital China. More importantly, the paper discusses the new contents of Geospatial Framework for Smart China, such as the Internet of Things and the location, the geographic conditions data, geospatial statistics and geographic knowledge based on big data, and the spatial and temporal cloud computing platform. And it also points out how to secure a supporting environment to develop the Geospatial Framework for Smart China.