Flight Grid

The flight grid that you select for your data collection stage will vary greatly depending on the profile of the site you are flying, and things like vegetation density and structures or buildings will affect the camera settings required for accurate data collection.  

All projects should be collected at 90 degrees/nadir for the main grid. You can add extra passes with 45-60 degree obliques to make the buildings & vertical structures look better in a 3D model but it doesn’t apply to the work AirWorks is doing nor will it provide the data quality we need to provide an accurate CAD deliverable. A double grid with perpendicular flight lines is recommended for all LiDAR collections.

Site Profile Recommended Camera Angle Recommended Flight Grid 
Dense, urban setting with many vertical structures 60 degrees, oblique Double Grid 
Dense, urban setting without vertical structures 90 degrees Single or Double Grid 
Suburban setting with vegetation 90 degrees, oblique and nadir Single or Double Grid 
Rural, open setting without vegetation 90 degrees, nadir Single Grid 
Homogenous areas (ex: snowcapped fields, woods or forests, large bodies of water, etc.) In this case, it is best to increase flight altitude in order to add more differentiated details in the images you collect, which will also make data processing and photogrammetry