This page describes the concept and how to measure using different Reference Surfaces.
More information related to mobile mapping measurements on Orbit Desktop and Orbit WebClient, see :
A 3D coordinate measured via DEM intersection is the result of the intersection of the reconstructed 3D line through focal point of the camera and measured point in the image and DEM.
DEM Intersection can only be used in an Image View and DEM has to be part of the Run\Project. Open one image and measure a point with one click.
Result of the measurement with Reference Planes Intersection measuring technique is a 3D coordinate derived by intersection of the 3D line (photo position - point measured in the photo) with horizontal or vertical plane. If Show hover is enabled in preferences 3D hover will indicate found planes.
Horizontal plane
Open one image and measure a point on the ground with one click. If measurement does not look correct please check that camera height is set correctly in the Orbit Mapping Run.
Vertical plane
Add a vector line or area vector layer to datasets list. Open one image and measure a point in a vertical plane.
Result of the measurement with Ground Surface Intersection measuring technique is a 3D coordinate derived by intersection of the 3D line (photo position - point measured in the photo) with the horizontal ground surface plane. The ground surface is calculated from the photo position 3D coordinates and camera height defined in the project. Used in Mobile Mapping context, not relevant for UAS and Oblique types of data.
Open one image and measure a point on the ground with one click. If measurement does not look correct please check that camera height is set correctly in the Orbit Mapping Run.