The development of satellite remote sensing technology is rapid in China in recent years, multiple optical remote sensing satellites have been launched like HJ-1A&B,ZY-1 02C,ZY-3,GF-1/2 and so on, which provide rich remote sensing data source for lithologic mapping. In order to give full play to the advantages of domestic satellite data in lithologic mapping and support data source selection of lithologic mapping, application product development, product and service quality assurance, meanwhile, promote domestic satellite application in geological mapping and improve the development of follow-up satellites, a region about 420km<sup>2</sup> in the East Tianshan Mountains, China was chosen as the study area, and a comparative evaluation of multiple satellite remote sensing data including HJ-1A, ZY-1 02C and ZY-3 in lithology interpretation was carried out in this paper. The applicable condition of these three satellite images were pointed out and the recommendations for future work were presented.
In order to fully understand the dynamic range of Gaofen-2 satellite data and support the data processing, application and
next satellites development, in this article, we evaluated the dynamic range by calculating some statistics such as
maximum ,minimum, average and stand deviation of four images obtained at the same time by Gaofen-2 dual cameras in
Beijing area; then the maximum ,minimum, average and stand deviation of each longitudinal overlap of PMS1,PMS2
were calculated respectively for the evaluation of each camera's dynamic range consistency; and these four statistics of
each latitudinal overlap of PMS1,PMS2 were calculated respectively for the evaluation of the dynamic range consistency
between PMS1 and PMS2 at last. The results suggest that there is a wide dynamic range of DN value in the image
obtained by PMS1 and PMS2 which contains rich information of ground objects; in general, the consistency of dynamic
range between the single camera images is in close agreement, but also a little difference, so do the dual cameras. The
consistency of dynamic range between the single camera images is better than the dual cameras’.
In recent years, with the rapid development of China's satellite remote sensing technology, ZY-1 02C, ZY-3 and TH-1 satellites have been successfully launched, ZY-3 satellite is China's first autonomous civilian high-resolution stereo mapping satellite, achieved a breakthrough in the field of civil high resolution mapping satellite. Its successful applications have become a new milestone in the history of Chinese satellite surveying and mapping, undertake to build database of remote sensing information, promote the development of geographic space information industry. This paper, based on data distribution service subsystem of the construction of ZY-3 ground processing as an example, introduces GIS in the subsystem which plays an important role. This sub-system is the window of the ground system of information collection and product distribution, whose task is to provide ZY-3, ZY-1 02C a variety of sensor data distribution service at all levels of products, to provide users with a unified search, browse, order and download services, and has a certain capacity expansion upgrade, which provides a technical basis and guarantee for subsequent satellite distribution service. With ZY-3 satellite in orbit, the amount of data is increasing, how to efficiently manage multi-source image data becomes the system to be solved. In this paper, ArcGIS mosaic datasets is used to manage large-scale image data to solve the many problems that exist in the traditional image management and shared services to complete data distribution. At present, the distribution system has been stabilized, and serves the masses of users.