1, field data collection in the calculation method The basic idea of what is?
In the field data collection, the use of total station with the polar coordinate determination of the appropriate number of "broken the Ministry of the basic points", and then semi-equipment Act (only measured direction), Kan Zhang method (only measuring distance) measured location of the point as part of the Department of broken (coordinates), and finally take full advantage of a straight line, right angle, parallel, symmetry, geometry, etc. all in the house (or field) to calculate the coordinates of the points of all the pieces.
2, broken the Ministry of point coordinates calculation method which five main categories, its principle of all why?
Total Station method (polar coordinates method, awarded eccentric France) Semi-station instrument method (the direction of a straight line intersection of the direction of right-angle intersection method)
Kan Zhang method (from the intersection method, a straight line within the cross-method) calculation (calculation of rectangular, vertical calculations, cross-loop calculation, parallel curves, symmetry point method) Image method
3, polar coordinate method measuring principle What is this?
4, want to test that the polar coordinate method can not be directly measured using any method of measurement?
To find a secondary point, through the auxiliary coordinates of points to the measured target
5, full instrumentation laws, including one, two polar coordinates, awarded eccentric method (straight-line method to extend the eccentric direction of extension of eccentric law, right-angle from the eccentric method)
6 What is the digital encoding, the basic content, type?
Data coding: The composition according to certain rules of strings of symbols to represent features in the relationship between properties and connection information such as
Basic elements: surface features elements of code, to connect the relationship between yards, flour-like filling yards
Type: three-digit code, four integer coding, other coding, no memory encoding, Jane coding
7, broken the points of data collection practices:
a, encoding: The encoding conventions to represent the geographical terrain entity attributes and the connection between measurement points
b, sketch method: using sketches to represent the point of connection between attributes and
c, Mapping Wizard method: using notebook computers or Pocket PC software, the graphical symbols were a direct mapping into a topographic map
8, Determination of broken briefly sketch the operation of the process of the Department of points
9, why then draft law practices, the importance of drawing sketch
10, draft Law on indoor mapping method: dot positioning, coordinate location, coding guide
11, need input to determine location coordinates of dot files, dot dot positioning is need to identify the file
12, described the coordinates generated by the encoded files and guided by the simple coordinate files generated code law What's the difference? How do I edit the boot file?
Various points on the data re-set number, the generated link code is only a plus sign, while France is generated by a simple code documents the additions and subtractions from the coding sequence of measurement points.
1, click on Edit, select the file editing, here highlighted. In the following command column enter the full path and file name, press Enter.
14, e-flat field data collection: a portable computer and connected total station, on-site measuring point, the computer shows that under the situation on the ground, can be directly connected into a map.