u/Witty-Accountant-250

Hello everyone,

I am currently working on a 50 km (31 miles) long road design project. We are using a DJI Matrice 4E along with a D-RTK 3 mobile station. The data we obtain will serve as the primary base for engineering design (road project), so vertical (Z) accuracy is our top priority.

To establish the control network, we performed 2-hour static observations on our base points and obtained the coordinates this way. However, I have some concerns about maintaining relative accuracy over such a long distance:

1. Potential Issues: What are the most common accuracy errors encountered in these types of long corridor flights?
2. Network Adjustment: Even though I have 2-hour static data for each point, should I perform a global least-squares network adjustment to tie all these points together? Or is it sufficient to calculate points individually and proceed with the RTK flight?
3. Consistency: Since road design (drainage and slope calculations) is involved, how can I guarantee a balanced model without "steps" or jumps between different flight blocks?

I look forward to hearing your insights and experiences.