Plane desk survey is that shape of survey wherein the size of survey strains of the transverse a of the transverse and their plotting to a appropriate scale are achieved concurrently at the field.It includes: 
ü Drawing Board set up on a tripod 
ü Aliade 
Drawing board: 
The drafting board is mad of properly pro wooden at the side of teak and its period varies from 400mm x 300mm to 750mm x six hundred mm. the board is set up on a tripod with ball and socket association which permit the board to be leveled and roatated approximately the vertical axis. 
Alidades: 
The open mild alidade The telescope alidade 
The open mild alidade includes a flat square piece of wooden of approximately, 25mm width, 12.5mm thickness and period severa from 
hundred to 500 mm The leveled fringe of the alidade is referred to as finducial issue. Its issue is graduated and serves as a scale. Vertical sight vanes are set up at each ends. One of the sight vanes is proved with a slender slit and the opportunity with a vital vertical wire. The line of sight is withinside the equal vertical aircraft because of the reality the finducial issue The telescope aliadade includes a telescope set up on a horizontal axis the ends of which might be supported on standards. A round degree or 
spirit tiers are connected to the bottom of the telescope to degree the aircraft desk. 
Working operations 
ü Fixing 
ü Setting 
ü Levelling 
ü Orientation 
Fixing 
Fixing the desk to the tripod stand 
Setting 
The desk is installation at a to be had top say 1m above ground. The legs of the stand are unfold aside and firmly ordinary into the ground. The desk is then centered. This way that the element plotted at the sheet just like the station occupied want to be precisely above the station at the ground. This is achieved via way of the plumbing fork. 
Levelling 
The desk is then leveled every with the useful beneficial useful resource of using ordinarly tilting the board or with the useful beneficial useful resource of using ball and socket association. 
Orientation: 
Orientation is the approach of placing the aircraft desk into a few ordinary path certainly so line representing a amazing path at the drawing sheet is paralle to that path at the ground. 
Two techniques adopted: 
Orientation with the useful beneficial useful resource of using magnetic needle Orientation with the useful beneficial useful resource of using once more sighting 
Methods of aircraft desk survey 
1. Radiation 
2.Intersection 
3.Traversing 
4. Resection