This project incorporated and combined aerial mapping and photogrammetry with aerial LiDAR, conventional surveying, and GPS surveying. The team also used GIS data, taking the tax map info along with deed research and deed plotting, and used that for planning where they would take cross sections to verify all of the LiDAR data, where to set control points, and where to look for property corners. All this preplanning brought with it some efficiencies that allowed us to keep the project on schedule.
Conventional survey methods were used to perform ground truthing by obtaining elevations along cross sections at a particular interval. This data was then compared to the LiDAR data that was collected, and if the two were not within a pre-determined acceptable range, we would gather additional data in that area to insure accuracy. When the LiDAR data was collected, some areas were obscured, so we used conventional methods to obtain elevations and topographic features. That data was then joined with the LiDAR data with a significant amount of overlap to ensure the quality of the combination.
GIS was also used as a right of entry in this project. There were many different parcels that we had to obtain right of entry from each land owner, and GIS was used as a tracking method to ensure that we had sent, they had received, and they had approved the right of entry.
To read more about our Survey team and their project experience, visit our Surveying services page.