The completion of the foundation buried stone heads, four measurements, a flat wire measurement, substandard level of measurement, map the root control field data collection and data editing.
完成了基础埋石、首级四等测量、一级平面导线测量、等外水准测量、图根控制等野外数据采集以及数据编辑工作。
The biggest difficulties in gravimetric observations are to get a first class map and the exact location of every measurement.
重力测量中最大的困难就是取得高精度的地形图以及确定每一测点的精确位置。
The data of GIS include space data and property data. Position errors are mainly from errors of direct measurement, digitalization of map, data input and store.
位置误差主要来源于直接测量的误差、地图数字化的误差遥感数据的误差、数据转换误差、数据输入与存储误差。
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