What is survey very simple answere

Survey:
     TO collect some basic and important information about the project..

 Survey types:
           1).Plane survey
         2).geodetic survey

 Survey instrument using in field 

 For horizontal distance measurement
 These five instrument can easily find horizontal distance ...
 1)chain
2)Tape
3)steel band
4)level machine
5)total station
6)theodolite

 For vertical distance 
1).level machine
2).total station
3).tape 
4).steel band
5).theodolite












FOR straight line in field
1).ranging rod
2).pegs

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