Using cartographic and survey instrument staff of the survey and mapping office carry out the production and revision of maps and plans at different scales for different purposes.
利用绘图及测量仪器，测绘处的人员专责绘制及更新各种比例的地图以作不同种类的用途。
2
Using cartographic and survey instrument, staff of the survey and Mapping Office carry out the production and revision of maps and plans at different scales for different purposes.
利用绘图及测量仪器，测绘处的人员专责绘制及更新各种比例的地图以作不同种类的用途。
3
The new revision method basically has resolved the problems of "Plane Earth Model" and has improved the accuracy of well survey calculation.