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Surveying the road by vehicular GPS(Global Position System), we need to compress the mass road data and select the feature points of the road to get the high precision electronic map for INS/DR/MM(Inertial Navigation System, Dead Reckoning, Map Matching) integrated navigation. A compression method of the infinite-circle approximating curves is given in this paper. This method is according to the adaptive...
There are many researches and applications about the Labeling for Electronic Map. Algorithmic efficiency is a problem which has came to front and need to be resolved in application. In this paper, a new algorithm for dynamic labeling which is based on the ideological raster grid is put forward. The algorithm first divides the screen into many raster grids, then labels of points, lines and polygons...
In order to obtain accurate, specific and timely weather forecasting image information, meteorological department want to issue weather forecast using WebGIS. With ArcGIS, the paper finished image display of the NetCDF(Network Common Data Format) data that WRF (Weather Research and Forecasting) output; combined NetCDF with ArcGIS electronic map; achieved a merger of weather forecasting information...
The project constituted Jinan City E-class GPS control network, 5"-class GPS control network and the fourth-order level network, providing high-precision geodetic datum; field work laid the aerial photography ground signs, adopting GPS to plate conjunction, gaining the three-dimensional coordinates of photograph control points, obtaining ground features in spatial point locations and attribute...
The functions of successive display and intelligent zoom among objects at different scales have not been developed in existing multi-scale navigation electronic map software system. So, taken the multi-scale and multi-media characteristics into consideration, this paper discusses the design and development strategies of multi-scale navigation electronic map. The total structure is built from the view...
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