The main task of engineering construction survey is lofting. The so-called lofting is to put the things on the drawings in the actual position according to the design proportion. So you need to calculate, usually use trigonometric function to calculate coordinates.
The main task of engineering design survey is to measure the actual ground objects, and then draw them on paper or computer according to a certain proportion through drawing software such as CAD. In this case, the knowledge used is less, and now it can be almost automatically completed by total station or GPS measurement, and then supporting auxiliary software.
Extended data:
Measure all kinds of information of space and earth, and draw topographic maps of all kinds of information. Taking the shape, size and gravity field of the earth and other planets as the research object, the research and mapping objects are very extensive, mainly including various surface features, landforms and underground geological structures, hydrology, mineral deposits and so on. Such as mountains, rivers, houses, roads, vegetation and so on.
Usually, before developing a virgin land or carrying out large-scale engineering construction, topographic maps must be measured and drawn by surveying and mapping engineers, and other information can be provided before decision-making, planning and design, so surveying and mapping is very important. Usually, the maps and traffic maps we see are completed on the basis of surveying and mapping. Engaged in surveying and mapping work often carries out field work, and should be psychologically prepared to face the tough environment.
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