The Research And Application Of 3D Editing Technology Of DLG

In the production of DLG (Digital Line Graph), mainly adopt DPS (Digital Photogrammetric System) or else methods to collect three dimension data, then the data is ducted into map editing system to be edited, at last, the vector geographic information and EPS (Electronic Prepress System) data is obtained. This data acquisition and editing independently product mode restricts DLG production. This Paper aimed to realize the integration of acquisition and editing of 3D data, lucubrated the key technology of stereoplotting of integration of acquisition and editing and three dimension editing, obtained certain of make progress. This paper mainly completed the following work and innovational points:1. It analysed the principle and production flow of 3D acquisition and editing of DLG, in allusion to the present research and development state introduced the advantage of the integration of acquisition and editing, expatiated the purpose and applied significance of 3D production of DLG.2. The key technology of plotting of the integration of acquisition and editing was researched, and completed the design of the integration of acquisition and editing digital plotting experimental based on the foundation. The system mainly is compartmentalized four function module: orientation and modeling of stereoscopic pair, 3D map of vector data, system data organization and symbol database, and 3D editing of DLG. Every function module is disparted as many submodules, the paper expatiated the technology principle and the relationship of the modules.3. It analysed the 3D editing technology characteristic of point, line and areal vector data, presented the algorithm of target-catching and 3D ground coordinates acquisition. It researched the key technology and expatiated the realization steps and technology flow of 3D editing, based on the technology of integration of acquisition and editing.4. The paper realized a experimental system based on the research of 3D acquisition and editing technology, and utilized the production data to carry out the experiment. And compared the effect of the orientation and modeling,3D map of vector data,3D acquisition and editing,analysed the accuracy. The work proved the feasibility of obtaining the 3D DLG through the integration of acquisition and editing digital mapping method.