Based On The LIDAR Data To Product The DLG And Control The Quality Of Data Processing In The Later

Digital line graph is a DatasetVector of the map features and the same with theLine Graphic in the current, and save the space relationship and related attributeinformation of each elements, is the necessary basic data of every national’sengineering.In the production of relecance company. The Airborne Laser RadarTechnology as a new measurement technology, need to conclusion a relativelyefficient’s technology route of DLG production.This article is written for some related production unit’s requirements for usingLIDAR data to product the DLG. Using LIDAR data to make digital line graph,trying to sort out a set of effective and detail of the production process. For controlingthe quality of the late data processing, starting from the two key points of thepost-production: one is improving the accuracy of the ground point, this paper usingthe existing arithmetic of the error detection flexibly, for grossing the error points ofthe ground points, and comparing the accuracyby grossing the error before and after.To verify the necessity of gross the error points in producting the digital line graph;the other one is to reduce the contradiction between the points and lines. In theelevation points and contour checking, uses the relevant procedure to judgmenttherelationship between the elevation points and contour.The main results are as follows1、Focus on introducing the later data processing of the airborne laser radar data,And for making DLG product source data (DEM contour DOM, etc).2、Researching the point data of the surface of after filtering for gross errordetection, Combined with the existing gross error detection algorithm, and use theprogram to apply flexibility, and analysisThe effect of gross error detectionbefore andafter.3、For the gland situation and the relative position errorsbetween the points andlines, use the program to find the efficiency instead of the artificial search inefficiency4、getting the highprecision of DEM and DOM by basing on airborne lidar data,Combining with the related photogrammetry production way, summarizes a set of the technical process of product a1:2000digital line graph, and assess the accuracy of theproduct.