摘要本次毕业设计的地形图测量方案主要是结合实际情况从图根控制网的设计布设开始，进行GPS静态测量，获得控制点的控制坐标，然后对控制点所在路线进行四等水准测量，求出各控制点的高差，从而计算出各个控制点的高程。最后通过RTK对碎步点进行采集，对所采集的数据进行点校正转换成国家2000大地坐标系的坐标，运用CASS软件进行绘图处理并生成图幅。关键词：GPS静态测量，二等水准测量，RTK，点校正AbstractThisgraduationprojecttopographicmapmeasuringprogramismainlystartingfromtheactualsituationmappingcontrolnetworkdesignlayout,staticmeasurementsofGPS,thecoordinatesofthecontrolpointstogaincontrol,thenthecontrolpointislocatedonthefourthlevelingroute,findheightofthecontrolpointstocalculatetheheightofeachcontrolpoint.FinallyRTKScatteredpointofcollection,thedatacollectedwillbeconvertedintothecoordinatepointcalibration2000nationalearthcoordinatesystem,usingtheCASSsoftwareforgraphicsprocessingandgenerateframes.Keywords：GPSstaticmeasurements,twoleveling,RTK,pointcorrection.目录摘要……………………………………………………………………...ⅠAbstract………………………………………………………………....Ⅱ1绪论..............................................................11.1技术设计的意义和目的........................................11.2地形图测量的技术现状........................................11.3设计的测图技术路线..........................................11.4设计内容....................................................22数字地形图的基本概念及其主要测量方法..............................22.1数字地形图................................................22.2数字地形图主要测量方法......................................23测区概况..........................................................33.1地理位置....................................................33.2测区范围....................................................33.3测区气候....................................................44地形图的分幅与编号................................................44.1意义与方法..................................................44.2梯形分幅与编号..............................................54.3矩形分幅与编号..............................................55测图控制..........................................................65.1GPS控制网..................................................75.1.1首级GPS控制网测量....................................85.1.2平面控制网平差........................................85.1.3GPS网的平差..........................................95.2水准网......................................................95.2.1精密水准仪和水准尺的检验..............................95.2.2水准测量观测.........................................105.2.3四等水准测量观测限差.................................105.2.4观测中间歇、收测和检验。.............................115.2.5高程控制网设计.......................................125.2.6水准测量步骤..........................................135.2.7记录数据与检算.......................................135.2.8高程控制网数据处理...................................136碎部测量.........................................................146.1实验部分...................................................146.2.仪器的配置................................................146.3人员的组织.................................................146.4RTK动态测量步骤...........................................146.5绘制数字地形图.........................
