XGRIDS Pro Guide™ / Module 9: LCC Studio

Map Fusion in LCC Studio

Combining multiple scan segments into a single 3DGS model using Map Fusion mode in LCC Studio, 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: segments must have been scanned with fusion in mind, with overlapping geometry and valid connection methods between adjacent segments.

K2 device support in LCC Studio Map Fusion: not currently supported. K2 is restricted to Single Model reconstruction with a 90-minute single-scene cap. Map Fusion for K2 is documented as "coming soon in a future version" by XGRIDS. For multi-segment K2 deliverables, plan the project to fit within the Single Model cap or wait for the future release that adds K2 to Map Fusion.

Map Fusion device support: L2 Pro and K1 fully supported. PortalCam supported. K2 not currently supported. All segments in a single fusion job must come from the same device type. L2 Pro 16-line and 32-line versions cannot fuse together even though both are L2 Pro.

Section 2

Map Fusion Limits

Map Fusion has explicit limits that must be planned for before field collection. Exceeding any limit results in a failed fusion job that cannot be salvaged without rescanning.

Limit

Specification

Maximum segments per fusion job

10 segments

Device compatibility

All segments must be from the same device type (all L2 Pro, all K1, or all PortalCam). K2 not currently supported.

L2 Pro channel compatibility

L2 Pro 16-line and L2 Pro 32-line segments cannot fuse together. The 32-line 120m and 32-line 300m configurations can fuse.

Segment connection requirement

Every segment must be transitively linkable to every other segment through RTK, control point names, or both. An isolated segment cannot be fused.

RTK Data setting

Disabling RTK Data on any segment removes it from RTK-based fusion connections. Such segments must use control points instead.

Section 3

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 4

Map Fusion Procedure

Click Create and select Map Fusion. This mode is distinct from Single Model. The configuration interface displays options for uploading multiple segments. K2 is not currently available as a device option in this mode.
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. The interface displays the device type detected from each segment's data.
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.
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.
Configure remaining parameters. Same quality (Fast / Standard / Slow), Portability, RTK Data, Special SLAM Mode, PPR, and Exposure Optimization options as Single Model. Verify hardware meets Map Fusion specifications (16-core CPU, 64 to 128 GB RAM, RTX 3090 or higher).
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. A 200-minute total fusion job at Standard quality runs overnight or longer.
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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