We are considering turning on the RTK capabilities in our eBee now that we know how much work it is to collect, document, and mark GCP’s. What are our options to use future years’ highly accurate photos to improve the accuracy of our models for previous years that are based on imprecise image geolocation?
For example, we could use the accurate models based on RTK imagery to identify features to serve as GCP’s using model coordinates, since rocks do not move from year to year. Would that be appropriate? How would we estimate the precision of each GCP coordinate based on the model? This approach still requires a lot of effort to identify and mark lots of GCP’s, but saves the labor of collecting them in the field.
Are there any approaches that would improve the accuracy of old models based on non-RTK imagery that would not require use of GCP’s? We probably can’t assume that using the same flight plan would result in identical image coordinates between the two years due to the wind. Any other ideas?