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<< Click to Display Table of Contents >> Navigation: General > Merge Geometry Points |
Note: This module is deprecated and is no longer recommended for use in new processing flows.
Merge Geometry Points rebuilds the internal geometry table by consolidating source, receiver, and CMP bin positions that lie within specified proximity thresholds. During acquisition, slight coordinate inconsistencies can cause nominally identical field positions to be recorded as distinct points. This module merges those near-duplicate geometry entries so that subsequent processing steps see a clean, deduplicated geometry.
The module accepts a trace header collection, applies the three merging distances independently to sources, receivers, and CMP bins, and outputs a corrected header collection together with summary statistics (total trace count, unique source count, unique receiver count, unique CMP bin count, and the memory footprint of the geometry table in megabytes).
The trace header collection carrying the current geometry — source, receiver, and CMP bin coordinates for each trace. This is typically the output of a geometry loading or assignment module such as Load Geometry or Geometry Application.
The maximum horizontal distance (in meters) within which two source positions are considered identical and merged into a single point. Source locations separated by less than this value will be treated as the same source in the output geometry table. The default value is 0.1 m. Increase this value if GPS or surveying noise causes source positions that should be coincident to appear as slightly different coordinates. Setting this value too high risks merging sources that are genuinely distinct.
The maximum horizontal distance (in meters) within which two receiver positions are considered identical and merged into a single point. Receiver locations separated by less than this value will be treated as the same receiver in the output geometry table. The default value is 0.1 m. Use the same guidance as for sources: apply a small tolerance to handle coordinate rounding artifacts without accidentally collapsing distinct receiver stations.
The maximum horizontal distance (in meters) within which two CMP bin centre positions are considered identical and merged into a single bin. Bin centres separated by less than this value will be consolidated in the output geometry table. The default value is 0.1 m. For regular land 2D/3D surveys the bin grid is usually perfectly regular, so a small sub-metre tolerance is generally sufficient to remove floating-point rounding discrepancies.