Module 8 - Plane Surveying

Question 1

Definition of plane surveying

Answer 1

Involves measuring distances and angles while plotting these observations in the field

Question 2

Advantages (5)

Answer 2

• gross mistakes are unlikely since area is at view
• long and tiring measurements of distance are avoided
• method is easy to master
• field notes reduced to minimum
• work is interesting and survoyr sees map grow

Question 3

Disadvantage (5)

Answer 3

• equipment is bulky and awkward
• rain and wind stop activities
• time consuming operation
• not as accurate as other methods of surveying
• impratical in areas of bush and heavy wooden

Question 4

Methods involved in plane tabling (4)

Answer 4

• radiation
• triangulation
• traversing
• resection

Question 5

Basic rules for setting out (4)

Answer 5

• best position fix is done from nearest control point .
• orenation must be checked into another point
• best orenintation is to the longest and clearest point
• orientation should be checked periodically whilst at the station and always before leaving station.

Question 6

Equipment (5)

Answer 6

• plane table
• alidade
• plane table and compass
• plumbing fork
• plane table spirt level

Question 7

Use of plane table(4)

Answer 7

• production of maps and plans of small area
• filling in details between control points
• for location contours
• when existing maps and plane are reviewed

Question 8

Importance points to bear in mind when setting up plane table(6)

Answer 8

• table should be level when erected
• table should be a workable height
• do not work in bad weather
• get to know area being surveyed
• always recheck oreintation
• each ray should be identified

Question 9

Plane table

Answer 9

Used to draw angles or directions between survey station or detail points into portable drawing table field.