The main Object of the survey is to develop a plan and a map.
The results of surveys when drawn on a paper forms a plan or a map.
On a plan or a map only horizontal distances are shown.
The plan or map is made according to some scale chosen.
If the scale is small ,the representation is called map, while it is called plan
if the scale is large.
We can understand this by considering that the map of a country is made to a very small scale.
So that information represented should not exceed to the paper.
While the plan of the building is made large and large scale is chosen for that.
Therefore the basic difference between plan and a map is that of scale.
Only horizontal distances are shown on a plan or a map.
Vertical distances are correctly shown by means of vertical sections called sections.