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1;500地形图要求(国外英文资料)
1;500地形图要求
1:500 topographic mapping
2.3.1 basic requirements
(a) topographic map, height of broken points, notes to 0.01m.
(b) mapping and representation of topographic elements should be performed according to norms and schemata.
(c) after the topographic map is completed, the operator should carry out self check and arrangement in detail, and the survey area should be inspected uniformly.
(d) the content of the topographic map should be reasonable, complete and comprehensive.
(E) topographic mapping should be correct, that is reasonable, micro appearance should be realistic.
2.3.2 data acquisition method
A) in the open area and meet the conditions for RTK measurement, directly using RTK technology to collection of three-dimensional coordinates of the point data, and the collected points according to the encoding in the electronic hand an ancient chess game.
B) using the total station instrument to collect data in the residential area or the RTK signal is poor.
The use of total station at all levels on control station, orientation, check, using the polar coordinate method to collect the terrain and surface features of three-dimensional coordinates of the point, using total station internal memory record terrain and object point observation sequence number, three-dimensional coordinates and encoding, sketch on the field, and marked observation sequence number. The station should record the sequence number of the error data so that the data can be deleted within the industry.
When data is collected, the maximum length of ground points and topographic points should be no more than 200 meters, and the principle of seeing clearly and not measuring should be observed.
2.3.3 instrument setting and station inspection
When mapping, the setting of the instrument and the inspection on the station shall comply with the following provisions:
A) instrument alignment error shall not be greater than 5mm;
B) a base point a direction of calibration, observation of another control p
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