The GCP constellation viewer is the interactive interface displayed during GCP processing in Aura. Use it to review automatically detected targets, assign survey points to locations in the point cloud, and confirm the constellation alignment before final processing.
The viewer opens automatically when Aura reaches the constellation matching stage, provided Wait for GCP Target Manual Review is enabled in GCP settings.
Survey points panel
The Survey Points panel lists all control points imported from the survey CSV file. Each entry shows the point ID, its association status, and controls for visibility and navigation.
Control | Description |
|---|---|
Center target | Moves the viewport to center on the selected survey point location. |
Show or hide target | Toggles visibility of the target in the point cloud. |
Check Point toggle | Marks the survey point as a Check Point, used only for accuracy validation and excluded from georeferencing. |
Control point labels fade automatically when the cursor is near them, making it easier to pick targets without manually toggling label visibility.
Target status indicators
Status | Label | Description |
|---|---|---|
Green box | Matched | The target has been successfully associated with a survey point. |
Blue box | Unmatched | The target is detected but not yet associated with a survey point. |
Inactive targets not matched to a survey point do not contribute to georeferencing. Drag an inactive target into the Survey Points panel to associate it, delete it if invalid, or leave it unused if not required.
Viewport tools
Tool | Description |
|---|---|
Select Point tool | Left-click near the center of a target in the point cloud to place a marker. Use the keyboard arrow keys to refine placement. Click Confirm to save. |
Select tool | Highlights a group of points for auto-selection. Used in the alternative target assignment method. |
Color scale and scalar filter
Adjust the color scale to identify GCP targets in the point cloud before beginning target assignment.
Setting | Description |
|---|---|
Intensity | Most effective for identifying flat, circular retro-reflective targets. Highlights high-intensity returns. |
Time | Useful for isolating points captured at specific intervals. |
Elevation | Useful for distinguishing targets at different heights. |
Use the scalar filter controls to narrow visible points:
Blue dots (bottom of filter): drag to set which points in the scale are visible.
Colored square boxes (top of filter): drag to define which points correspond to which colors.
Alignment error
The rigid alignment error is displayed in the viewer and updates each time Re-Align is clicked. Large values are expected in complex SLAM environments and reduce once SLAM correction is applied during final processing. Review this value to identify mismatched targets or errors in the survey CSV.