XGRIDS Pro Guide™ / Module 9: LCC Studio

9.3 Map Fusion in LCC Studio

Combining multiple scan segments into a single 3DGS model using Map Fusion Reconstruction mode, including limits, connection methods, and boundary inspection.

Section 1

Map Fusion in LCC Studio

Map Fusion combines multiple scan segments into a single 3DGS model. The same field collection requirements that apply to LixelStudio Map Fusion apply here, and segments must have been scanned with fusion in mind, with overlapping geometry and valid connection methods between adjacent segments.

Limit
Value
Maximum segments per job
10
Maximum total scan duration
200 minutes
Recommended maximum per segment
20 minutes. Target 12 to 15 minutes. Going over does not ruin the scan but increases processing time and RAM requirements significantly.
Device consistency
Same device type across all segments. K1, L2 Pro, and PortalCam cannot be mixed in one job.
Minimum overlap
50 ft (15 m). Less than 33 ft (10 m) causes fusion failure.
Overlap content
Must contain rich features. Empty corridors, open fields, and featureless walls as overlap zones cause poor alignment.
Coloring consistency
All segments must use the same coloring method. Cannot mix built-in camera coloring with external Insta360 coloring within one fusion job.
Section 2

Connection Methods

Adjacent segments connect through RTK, matching control point names, or a combination of both. Every segment must be transitively linkable to every other segment through the connection chain. An isolated segment with no connection to any neighbor cannot be fused.

Control point names are case-sensitive and must match exactly across segments. A point named FP_01 in segment A and fp_01 in segment B is treated as two different points. The connection fails silently. LCC Studio does not display an error. The segment is isolated from the fusion result.

Disabling RTK Data in reconstruction settings removes the segment from RTK-based fusion. If a segment is processed with RTK Data set to Disabled, it has no absolute coordinates and cannot connect to adjacent segments via RTK. It must use control points instead.

Section 3

Map Fusion Procedure

  1. Click Create and select Map Fusion Reconstruction. This mode is distinct from Single Scene. The configuration interface displays options for uploading multiple segments.
  2. Upload all segments. LCC Studio reads the connection status of each segment based on RTK data and control point names present in the scan files.
  3. Review the connection diagram. Every segment must show at least one connection to an adjacent segment. Isolated segments must be removed from the job or the field data corrected before fusion can succeed.
  4. Set Max Gaussian Splats. In Map Fusion mode, this value applies per chunk, not to the entire scene. LCC auto-adjusts chunk size based on overall scene scale. Values above 25M generally do not affect quality in fusion modes.
  5. Start reconstruction and do not interrupt. LCC Studio processes individual segments, aligns them, and runs global optimization across the combined dataset. Interrupting between phases can require restarting the full fusion job.
  6. After completion, inspect every segment boundary in the viewer for discontinuities or misalignment. A misaligned boundary indicates connection point tolerance was exceeded in the field. The affected segment must be rescanned.
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