Geocassini Viewer for Visualising LIDAR and Mobile Mapping Data

Settings

Video link: Parameters

Clicking on the Parameters icon opens the following window:

Fig. 1: Parameters
Fig. 1: Parameters

Click on Colour:

Fig. 2: Colour
Fig. 2: Colour

You can display clouds according to their Colour, Altitude, Intensity, or Gradient. By default, the screen is set to Colour.

Altitude Display Mode

In this display mode, there is a small bar below the word Altitude that allows you to adjust the screen intensity based on the altitude levels of the display.

Fig. 3: Altitude
Fig. 3: Altitude

Intensity Mode

In this display mode, there is a small bar below the word current that lets you adjust the display intensity.

Fig. 4: Intensity
Fig. 4: Intensity

Intensity Gradient Mode

In this view, there is a small bar below the word Intensity Gradient, which allows you to adjust the screen intensity. The Intensity Gradient mode is equivalent to the one used in point cloud processing software. This mode is particularly useful as it allows you to specify certain coordinate points when identifying elements within the cloud.

Fig. 5: Intensity Gradient Mode
Fig. 5: Intensity Gradient Mode

Colour Mode Display

The colour mode display is used by default.

Note: If your point cloud lacks colour, it will be displayed in black.

Fig. 6: Colour Mode
Fig. 6: Colour Mode

Other parameter options include:

  • High Definition: to display the screen in high definition. Ideal for taking screenshots or working on point clouds indoors. (Note: This feature may cause point cloud display issues if your graphics card is not powerful enough.)
  • Background Colour: Can be Black or White depending on user preference.
  • Number of Points: Allows you to manage the number of points displayed on the screen.
  • Point Type: Fixed or Adaptive (i.e., the representation of the point varies depending on the zoom level).
  • Point Size: Allows you to manage the representation size of points.
  • Lighting: This function allows you to improve the quality of the cloud visualisation. Controlled by two horizontal sliders that allow you to manage brightness and contrast levels (for optimal rendering, set brightness to 0.1 and contrast to 1).
Fig. 7: Other Parameter Options
Fig. 7: Other Parameter Options

Camera

Video link: Camera

This function is used to manage navigation parameters within the point cloud. These parameters are:

  • Camera Projection
  • Navigation Mode
  • Point Cloud Orientation
Fig. 8: Camera
Fig. 8: Camera

Camera Projection

The Orthographic mode allows you to move in a perpendicular view, i.e., without projection or 3D effects. This mode is particularly useful for drawing.

In this mode, the navigation mode should be Orbit.

The Perspective mode, on the other hand, allows you to navigate in 3D within the cloud, with all navigation mode functions active.

Fig. 9: Camera Projection
Fig. 9: Camera Projection
  • Earth: The rotation centre is at the cursor level.
  • Orbit: The rotation and displacement centre is at the centre of the screen.
  • First-Person Control: Allows immersive navigation, enabling you to rotate around yourself. Use the directional arrow keys to move.
Fig. 10: Navigation Mode
Fig. 10: Navigation Mode

The Earth mode allows you to navigate the cloud in all three-dimensional displacement components. In this mode, the Show Scan Positions icon is active, and if validated, the scan positions are displayed in the cloud and on the map... This is very useful for immersive navigation.

The Orbit mode locks rotation around oneself, allowing the same functions as in the Earth mode.

Fig. 11: Orbit Mode
Fig. 11: Orbit Mode

Clicking on the small lock icon on the right side of the window disables the cube functions, which are helpful for orientation within the cloud. This is very useful when you want to maintain a chosen orientation for work.

Note that you can visualise your movement on the map, providing significant orientation assistance.

In this mode, the Show Scan Positions icon is active, and if validated, the scan positions appear in the cloud and on the map... This also allows you to move more quickly.

In First-Person Control mode, you can only move at a person¿s height. Floating functionality is disabled. A horizontal bar allows you to set your movement speed. This feature is particularly effective for immersive navigation in buildings.

Point Cloud Orientation

These icons allow you to choose the orientation mode in which you wish to move within the point cloud.

Fig. 12: Point Cloud Orientation
Fig. 12: Point Cloud Orientation

Measurements

Video link: Measurements

Clicking on the Measure icon opens this page.

You can measure:

  • Angles
  • Obtain a point¿s coordinates
  • Measure distances
  • Measure heights
  • Measure horizontal areas
Fig. 13: Measurements
Fig. 13: Measurements

Measuring Angles

In this example, we measured the angle between two overhead cable lines (important information for calculating loads on a pole...). The result is displayed on the screen and in the left window containing the functions. A horizontal bar is used to adjust the size of the point representation.

Fig. 14: Measuring Angles
Fig. 14: Measuring Angles

Measuring a Point¿s Coordinates

In this example, we click on a point within the cloud and obtain its x, y, z coordinates. The altitude result is displayed on the screen and in the left window containing the measurement functions, where X, Y, Z are located. A horizontal bar is used to adjust the size of the point representation.

Measuring an Inclined Distance

Fig. 15: Measuring an Inclined Distance
Fig. 15: Measuring an Inclined Distance

After clicking on the corresponding icon, point to the two ends of the distance to be measured in the cloud. This distance appears in the cloud and in the left window. While the command is validated, each new point triggers a measurement. Right-click to exit the command.

Each measured distance can be transformed into a height or slope measurement through the three check options below the measurement in the summary window.

Fig. 16: Distance
Fig. 16: Distance
Fig. 17: Height
Fig. 17: Height

Measuring an Area

Fig. 18: Measuring an Area
Fig. 18: Measuring an Area

After clicking on the ¿Area¿ icon, point to the different points of your area in the cloud. The distance between the points is displayed at each point, and when the last point of the area is entered, right-click to exit the command and see the area value. The result is displayed in the cloud and in the left window.

Measuring on the Map

Fig. 19: Measuring on the Map
Fig. 19: Measuring on the Map

By activating the ¿Measurements¿ function, the main icon at the bottom right, you can measure distances between two points and measure areas. The area is automatically calculated when the polygon is closed by clicking on the first point.

Data

Indicates the currently active files, allowing you to enable or disable their display.

Fig. 20: Data
Fig. 20: Data

360 Photos

Menu allowing the visualisation of the position of 360 view scans and the number of loaded photos.

The opacity of the point cloud can be modified: 0 minimum opacity, 1 maximum opacity.

Attributes related to the CSV file, such as attributes and angle unit, should not be modified.

Fig. 21: 360 Photos
Fig. 21: 360 Photos

Update

Allows you to refresh the point cloud and the image.