Glossary

Business and technical terms used throughout the SEABIM Editor documentation.

A

Accuracy

Median distance between the reference cloud points around a block and the block's surface. Main metric for fidelity to the survey. Computed by Compute accuracy.

Adaptive dist

Threshold distances that vary by context (block type, neighborhood) used by the automatic registration Register selection - Adaptive dist. Defined in parameters.json.

As-Design

Project folder holding the theoretical placement plans of the breakwater.

B

Berm

Horizontal or low-slope section of a breakwater, at the crest or at a slope break.

BIN (CloudCompare)

CloudCompare's native save format, able to hold a full scene (clouds + 3D models). See File formats.

BlockFinder

Automatic block detection algorithm running on a point cloud (action Find blocks in a point cloud). Gated by the WIBU license.

Block

Structural element of a breakwater (accropode, X-bloc, cube, …). SEABIM work is about positioning each block in space from a point cloud.

Toe (butée de pied)

Lowest section of a breakwater, in contact with the seabed. A focus area during the verification step (standard procedure § Verification).

C

Checkpoint

Snapshot of the structure pushed before every modification, allowing rollback via Undo (Ctrl+Z).

CloudCompare

Open-source point-cloud manipulation software. SEABIM Editor runs as a plugin of CloudCompare 2.13.

CodeMeter / WIBU

USB-key licensing system used by SEABIM Editor for activation and feature enablement. See License activation.

Contacts

Number of neighboring blocks in direct contact with a given block. Filter computed by Contacts (All blocks).

Cycle (training)

Training unit of the V2 detection algorithm. A cycle contains 100 samples of the cloud, each covering about ten blocks.

D

Displacement

Movement of a block between two consecutive surveys. Computed by Displacement.

F

Feature Map

Set of feature bits enabled by the client's WIBU license. Conditions the visibility of some actions (e.g. BlockFinder).

Filter

Scalar field computed on the blocks to qualify their placement (out profile, contacts, overlap, …). See Filters module.

J

JSON (structure)

Main storage format for a SEABIM Editor structure. See Structure JSON file.

L

Launcher

PyQt5 window opened when clicking the SEABIM Editor button in CloudCompare. Centralises all actions, organised by tabs.

Batch

Action category in the Metadata module acting on all selected blocks at once (e.g. Change parameter (Batch)).

Waterline

Level where the breakwater crosses the mean sea level. Focus area for bathy/photog placement coherence.

M

MBES (Multibeam Echosounder)

Multibeam bathymetric survey, typical source for the submerged part of the breakwater.

Module

Group of actions by domain, exposed as a tab in the launcher (Import, Edit, Quality control, Filters, Metadata, Export).

N

Point cloud (PCD)

Set of 3D points coming from a survey. Mandatory format for SEABIM Editor: .pcd. See File formats.

O

Offset

Translation applied to switch from local coordinates (used internally for precision) to global coordinates.

P

Package

Logical grouping of several panels under a common business name.

Panel

Logical grouping of blocks sharing a plot_number. Used by Group / Ungroup.

Photog (photogrammetry)

Photogrammetric survey, typical source for the emerged part of the breakwater.

Plot

Theoretical position of a block on the placement plan. Identified by a plot_number.

R

Registration

Realignment of a block on the point cloud to refine its position. Main action of the Edit module.

Overlap

Volume of intersection between two neighboring blocks, expressed as a fraction of the block volume. Computed by Overlap.

Final render

CloudCompare BIN files generated at the end of a project, ready for delivery. See Export final render.

S

Median score

Synonym of accuracy.

Structure

Set of blocks making up a reconstructed breakwater. Saved as JSON.

T

Slope

Inclined face of a breakwater. The slope normal is used as a reference by the Perpendicular nose and Perpendicular anvil filters.

V

Voids

Unexpected aeration cavities inside the structure. Detected by Voids.