State Bureau of Surveying and Mapping

About: State Bureau of Surveying and Mapping is a based out in . It is known for research contribution in the topics: Terrain & Pixel. The organization has 277 authors who have published 206 publications receiving 2044 citations.

Recent Development in the Earth Gravity Field Determination by Modern LEO Satellite

Abstract: Recent development and behaviors for the determination of Earth gravity field by LEO satellite has been reviewed. Those Gravity satellites as the launched CHAMP and GRACE, GOCE, which will be launched soon are introduced briefly. The gravity information including the space accelerator data collected by CHAMP satellite, as the first spatial practice in the modern gravity satellite series, is discussed.

Coordinate transformation models and their practicability

Abstract: We introduce various coordinate transformation models and their practicability.Through a large of tentative calculations,we analze the coincident point density influence in different coordinate transformation model and four-parameter model of two-dimensional projection deformation,we study size of different coordinate transformation model of extrapoled extension and extrapoled error,and obtain corresponding conclusion that provides useful of reference for different regions of geographic information coordinate transformation.

Application of Three Dimensional Panorama to Introducing Traveling Scenic Area

Abstract: In this paper, we find the technique of three dimensional panorama's huge function in introducing traveling scenic area through the elaboration about it, especially the elaboration about its use Then paper showed how to display its use with the form of webpage and discussed the Realistic feasibility of this application In this way, it provides a reference for the application of three dimensional panorama technique in introducing traveling scenic area

3D terrain visualization system of coastal zone

Abstract: The 3D terrain visualization of coastal zone is based on the seamless integration of geospatial data from water to land. Because of the differences in surveying methods and application areas, the land elevation data and the water-depth data are different in spatial reference, data accuracy and data type. This paper presents a methodology to integrate multisource terrain data of coastal zone and build an integrated DEM from water to land. Based on the C++ and OpenGL, this paper offers a 3D visualization system which realizes the realistic 3D terrain visualization of coastal zone with the instantaneous shorelines generation.

Image defect of full-frame CCD in TDI mode

Abstract: When a long focal area-array CCD camera takes photos in a TDI mode for dynamic lateral multi-frame imaging, it will output images with large size defect on the edge of image because of the high line transfer frequency or long exposure time and will influence image interpretation. To overcome the problems, the operating principle of area-array CCD in the TDI mode was analyzed, and the analysis indicates that the large size defect in the image comes from the invalid TDI transfer stages of the CCD during shutter exposure process. The obtained results were verified by a experiment and a method that the TDI transfer was finished simultaneously with shutter exposure was proposed to remove the invalid TDI transfer. On the basis of the analysis, a photo-electricity positioning synchronized was proposed and a photo-electricity synchronizer was developed to settle the headache. The results show that the image defect area is less than 15 column-pixels, which successfully solves the image defect from the area-array CCD camera in the TDI mode and improves its image interpretation accuracy.