Welcome to the 3DF Zephyr tutorial series.
In the following tutorial, we will learn how to get a DEM – digital elevation model– and to draw profiles starting from that.
These tools are available for 3DF Zephyr Pro and Aerial versions only.
For this tutorial, you can use any dataset you’d like. We are going to use the public dataset linked just below.
![]() | Dataset Download – The Cave (1.6GB) |
This step is similar to “Orthophoto generation Tutorial” as you are supposed to generate an orthophoto before running DEM generation, so click on Workflow (1), then on “True Orthophoto from Mesh” (2).
In the “Orthophoto wizard” panel (3) you are allowed to choose if either exploiting control points or axis method (4), then just click on “Next” (5) button.
You have to specify also the “Elevation Axis” (7) and, when you are ready, click to “Generate Orthophoto” (8) button.
As soon as the computation is completed the DEM viewer will appear automatically. It allows seeing the DEM you have just created directly inside 3DF Zephyr (see image below).
– load DEM files (even those not related to the project you are working on) by clicking on “File” (11) and “Open” (12);
– place contour lines on DEM if they have been previously generated in 3DF Zephyr, by clicking on “View” and “Show Contour Lines”;
– export DEM as a image format (.png, .jpg, .bmp);
In the DEM Viewer, it is also possible to run a Profile generation in order to draw one or more polylines directly on DEM and getting than their altimetric profile.
To to draw a polyline on DEM you simply click on “Elevation Profile” (13) and select “Enable Picking” (14) in the DEM viewer window. By drawing one or more polylines on DEM you will notice that each vertex will be identified by a number (see image below) (15).
Moreover, by moving the cursor you can see the quote of every single profile point in detail.
The next tutorial will explain the coded target generation and automatic detection. Click here to proceed to the next tutorial.