Hello,
I need to survey a 50Ha parcel, there is a delta of 30m between the point and the low point.
What do you think of the positioning of GCPs (see image)? The units are in meters.
The flight is planned at 100m (GSD 2.73) in DJI Phantom 4PRO with an overlap of 75% and 65%.
I planned 16 gcp, one part to use for the setting and the other for the controls.
The position of the GCPs in the attached document looks good. You covered the recommendations by distributing GCPs evenly throughout the area and putting them on different elevations.
The number of GCPs should be sufficient. In case that you will perform multiple flights, we recommend putting some additional GCPs in the overlap area between flights. It is also recommended that you have at least 5 GCPs in every subflight.
The errors look good, we typically say that the expected accuracy for the Z coordinate is 1-3 x GSD.
As you mentioned, a few check-points have a bit larger error in the Z-axis. This could be due to the fact that they are located close to dense vegetation or in the middle of the field.
These cookies are necessary for the website to function and cannot be switched off in our systems.
They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences,
logging in, or filling in forms. These cookies do not store any personally identifiable information.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site.
They help us to know which pages are the most and least popular and see how visitors move around the site.
All information these cookies collect is aggregated and therefore anonymous.
If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
These cookies may be set through our site by our advertising partner (Google).
They may be used by Google to build a profile of your interests and show you relevant adverts on other sites.
They do not directly store personal information but are based on uniquely identifying your browser and internet device.
If you do not allow these cookies, you will experience less targeted advertising.