Scales | Engineering Surveying
Scale is a fixed ratio that every distance on the plan bears with corresponding distance on the ground.
Rulers bearing a certain specific scale for measurement
Scale can be represented by the following method
One centimetre on the plan represents some whole number of the metres on the ground.
1cm = 10m
This type of scale is called engineering scale.
1 unit of length on the plan represents some number of same units of length on the ground.
1/1000 etc…
This ratio of map distance to the corresponding ground distance independent of units of measurement is called Representative Factor (RF).
For example,
1cm = 50m
RF = 1/(50×100) = 1/5000
Above two types of scales are also known as numerical scales.
There are four main types of scales which are used for different purposes for measurements:
We will discuss each of the scale type in detail in our succeeding articles…
#1 by jasper on April 23, 2011 - 8:00 am
survey in engineering is something an engineer realy needs to know.