Who can use this feature
Editors of a project within a Professional or Pro + workspace.
Selection requirements for tool to work
A DSM or DTM
Calculating slope from drone data is useful across a wide range of environmental, planning, and engineering applications. During the process of creating your orthomosaic, GeoNadir also generates a digital surface model (DSM) and a digital terrain model (DTM). These elevation layers can be used to derive a slope layer, expressed in degrees, that describes how steep the terrain is at each location. Common uses include assessing terrain steepness and accessibility, identifying erosion-prone areas, supporting hydrological and drainage analysis, and understanding topographic variation for site planning and environmental monitoring.
To generate a slope layer on GeoNadir:
Select a DSM or DTM layer
Click the
Generate slopetool on the context menu (or access via the Toolbox > Analysis > Generate slope)
After you perform this operation you will see a new layer in your table of contents and on your map where every pixel contains the slope angle (in degrees) at that location.
To analyse your new slope layer, you may find it helpful to:
Change the colour ramp to a gradient that you like
Change transparency to view or obscure layers below
Enhance the contrast to make certain values 'pop'
Use the Inspect tool to check individual pixels
Create a threshold classification to highlight specific ranges that might align to low, medium, or high values (for example).