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|