Let�s now go over the best practices when it comes to GCPs.
To get the best out of GCPs, you need to have an idea of -
Number of GCPs you need to capture
Where the GCPs need to be located on the site
and the GCP target design
Let's go through each of these in detail.
Here�s an example of a site which we will use to illustrate to you the number of GCPs we need to use at site:
A minimum of 3 GCPs is recommended for any site.
However, best results are obtained when you use 5-8 GCPs irrespective of the size of the project.
Having too many GCPs can actually reduce the accuracy of the output as it follows the law of diminishing
returns which essentially means that too much of the same thing is actually detrimental to the results you expect!
Make sure that the GCPs are not marked along a straight line.
This creates a large degree of freedom and allows for error to sneak into the outputs.
The GCPs need to be well spread out across the project area.