3D Viewer

1. Description

Alteia's 3D viewer allows a user to visualize 3 Dimensional (3D) data for a given site that has been processed via the photogrammetry analytic within the platform or uploaded to the platform from external software.

The purpose of this article is to highlight the 3D viewer features and tools.

2. Switching between 2D and 3D views

Click on "Switch between 2D/3D" on the map view to display the 3D site view. And click again to return to the 2D view.

3. Split View: Gallery/3D

By clicking on the "Split screen to view images" icon, the Gallery mode will activate, splitting the screen to visualize the original images associated with the 3D data.

The Gallery mode supports various imagery types, e.g. thermal images as seen here in grayscale or RGB photos.

4. Helicopter mode

The Helicopter mode simulates helicopter navigation over the site using the keyboard's arrows for direction and the mouse wheel to manage the speed.

5. Access to the compare tools

Compare tools are available in the 3D viewer, for more information see Compare View.‍

6. Split screen to view 3D settings

Click on the "Split screen to view 3D settings" to change the background of the 3D view and set the mesh brightness.

7. Single image locations in 3D View

From the Layer Panel, selecting Image Locations will cause the image positions to be displayed as spherical markers in the 3D view. Clicking on any of these markers will open a single image in the information panel on the right side.

There are 2 types of location spheres:

The electric blue location sphere where photogrammetry process has been done results in the pyramid projection of the picture.

The dark blue location sphere where there is no photogrammetry process launched results in just the picture location and preview.

8. Enabling & Disabling the 3D Layers

Select layers to be displayed from the Base Layers section in the bottom part of the left panel.

9. Classified Point Clouds

To see the classified point clouds:

Select the point cloud layer (visible in 3D Viewer) and click on it to open the right panel info.
In the right panel info, section "Bandwidth preview", choose "classification" from the menu "Material"
Scroll down the right panel info to see the "CLASSIFICATION" section and the legend for each classified class.
Tick/untick a class to show/hide this class from the viewer.

10. Downloading Point Clouds

From the Download section, las files can be selected and exported for further use with third-party software. Please note that point clouds generated from a process launched in Alteia (e.g. a point cloud from a photogrammetry process‍) are in a standard las 1.2 format.