Geodesy. Modern geodetic technique

Июль 24, 2022

Главная
Физика
Geodesy. Modern geodetic technique

Содержание

2. TOTAL STATION
3. Harry Williams, Cartography X Y Z NORTH EAST
4. The total station works by firing an infrared laser beam at a reflector mounted on a
5. Example based on UTM: NORTH ANGLE DISTANCE X Y TOTAL STATION: UTM = 3676595m N 672156m
6. Most total stations have the ability to record survey data as a digital file, which can
7. Why use a total station? 1. Field work is carried out very fast. 2. Accuracy of
8. When do you use a total station? For mapping small areas (the range of a total
11. Comparison of total station and GPS
12. SMART STATION Benefits of SmartStation: ■ Control points are not needed; ■ No awkward traversing required;
13. Robotic total stations Allows the operator to control the instrument from a distance via remote control
15. Скачать презентацию

Слайд 2

TOTAL STATION

Слайд 3

Harry Williams, Cartography
X
Y
Z
NORTH
EAST

Слайд 4

The total station works by firing an infrared laser beam at

a reflector mounted on a stadia rod. The distance between the total station and the reflector is calculated based on the time taken for the beam to reflect back to the total station.

reflector

Total stations were originally developed for the construction industry – e.g. surveying new roads, laying out building foundations, utility lines etc..

Слайд 5

Example based on UTM:
NORTH
ANGLE
DISTANCE
X
Y
TOTAL STATION: UTM = 3676595m N 672156m E
Y=150m; X=70m
UNKNOWN

POINT UTM=3676595 -150 3676445m N
672156 +70 672226m E

Слайд 6

Most total stations have the ability to record survey data as

a digital file, which can be imported to a PC-based GIS program.

MAP

Слайд 7

Why use a total station?
1. Field work is carried out

very fast.
2. Accuracy of measurement is high.
3. Manual errors involved in reading and recording are eliminated.
4. Calculation of coordinates is very fast and accurate. Even corrections for temperature and pressure are automatically made.
5. Computers can be employed for map making and plotting contour and cross-sections. Contour intervals and scales can be changed in no time.

Слайд 8

When do you use a total station?
For mapping small areas

(the range of a total station is around 2 miles or so – assuming you have good lines of sight). A good example would be mapping an archaeological dig site.
There are many other applications in earth science that require great accuracy e.g. monitoring cliff erosion, glacier movement, changes in beach profiles, sand dune movement.. and so on.

Слайд 9

Слайд 10

Слайд 11

Comparison of total station and GPS

Слайд 12

SMART STATION
Benefits of SmartStation:
■ Control points are not needed;
■

No awkward traversing required;
■ Consistent high accuracy;
■ Complete survey quicker;
■ Traversing skills not required;

Слайд 13

Robotic total stations
Allows the operator to control the instrument from a

distance via remote control
This elliminates the need of an assistant staf member, as the operator holds the reflector and controls the total station from the observed point