The Measurement Tool is integrated into the Annotation Menu.
It's important to note that the Measurement Tools allow measuring directly on the raster or on the point cloud (3D) displayed without creating annotations saved as a layer (point, line, polygon, etc...)
To access the tool, click on the ruler logo at the bottom of the annotation tools menu.
No requisite is mandatory, a DSM is nevertheless advised. If no DSM is available, Shuttle Radar Topography Mission (SRTM) will be selected by default.
3. Point measurement
3.1 Create a point measurement
Step 1 - Select "POINT" on the Measure tool and click on a location to measure to create a point.
- The position of the point is displayed in WGS84 (Lat, Long) and in the Site CRS (Global Coordinates).
- The elevation of the point will be displayed If there is an elevation raster available on the Site (for example DSM) and in the current survey.
Step 2 - Select which raster the measurement is done by opening the dropdown menu.
Step 3 - Save this point as an annotation by clicking on the floppy disk icon.
3.2 Compare a point measurement
Step 1 - Click on "COMPARE WITH" to compare a measurement point between two rasters.
Step 2 - Select a different raster from the one in the current survey to compare the elevations.
4. Distance & Elevation profile
4.1 Create a line measurement
Step 1 - Select "DISTANCE & ELEVATIONS" on the Measure tool and draw a line with a location to measure. The distance is also measured (projected distance to a flat plane).
Step 2 - Click on "ELEVATION PROFILE", a pop-up window will appear that displays the elevation profile.
Step 3 - Save this line as an annotation by clicking on the floppy disk icon.
4.2 Elevation profile options
In the Elevation profile window, there are a few options:
- Compare To: with the drag-down menu, select another raster to obtain another elevation profile for comparison. The second curve is displayed with different colors.
- 1:1 ratio: change the ratio of the curves.
- EXPORT AS: different formats are available: JSON, Shapefile, DXF, and FPC.
- Move the mouse along the curves to read the values. The point is highlighted on the line in the map view.
- Choose which raster to calculate the measurement.
4.3 Compare a line measurement
Step 1 - Draw a line (see Paragraph 4.1) and click on "COMPUTE 3D MEASURES" to deploy the menu and get access to "COMPARE WITH".
Step 2 - Click on "COMPARE WITH" to compare a measurement line between two rasters of different surveys.
5. Area & Volume
5.1 Create a polygon measurement
Select "AREA & VOLUME" on the Measure tool and draw a polygon on the zone to measure to obtain a 2D surface and perimeter measurement.
5.2 3D measurements
Step 1 - Click on "COMPUTE 3D MEASURES" to obtain 3D measurements.
Step 2 - Select the raster layer to which the measures will be applicable.
Step 3 - Click on the floppy disk icon to save the polygon as an annotation.
5.3 Compare a polygon measurement
Click on "COMPARE WITH" and select a different raster layer of the current or another survey to compare the values.
6. 3D View Measurement Tool
Measurements of points, distances, areas, heights, and slopes are also possible in 3D view and are displayed in the same way as in 2D view thanks to a pop-up window.
- Area and Volume
- Click on the floppy disk icon to save the polygon as an annotation.