Previous labs have shown how to use ground control points while performing post-processing but this lab handles actually gathering GCP data in the field. We utilized ESRI Field Maps to create a feature layer over the already provided one. This new feature layer would hold the coordinates recorded on our phone for the ground control points. The feature layer provided had a sketch that provided recommendations for the GCP locations. Then we entered the field and recorded GCP points as precisely as possible in comparison to the sketch layer.
As you look at the above generated map you can see the difference between sketch and the recorded ground control points. This highlights the importance of accurate ground control points and the ineffectiveness of mobile devices as equipment.
