ARKmatrix
From ARK
This page summarises L - P : Archaeology's ongoing work on Harris Matrix software.
- Our ARK Matrix software: https://github.com/lparchaeology/ArkMatrix
- Our survey of the State of the Art in 2015: http://archaeologic.al/wiki/Harris_Matrix
- The Matrix Reloaded - CAA UK 2016 presentation by John Layt of L - P : Archaeology https://www.youtube.com/watch?v=geLD7Fo6crU
Contents
ARK Matrix Software
High-level sketch of docs - a Work-in-Progress!
Strat Units
Unit Attributes
- Site Code
- Unit ID
- Label
- Class [Context, Subgroup, Group, Landuse]
- Type [Deposit, Fill, Cut, Masonry, Skeleton, Timber]
- Status [Allocated, Assigned, Void]
- Aggregate Unit
- Phase
- Period
Strat Relations
- Above / Below (directed graph)
- Same-As (undirected graph)
- Contemporary With (undirected graph) [REMOVE?]
Rules / Heuristics
Any Relations:
- Cannot be between same Unit
- Both Units must be same Class
Above/Below Relations:
- Adding relation should not create cycles (no intersection between successors and predecessors)
Same-As Relations:
- Both Units must be Context class
- Adding relation should not create cycles (no intersection between successors and predecessors)
- Both Units must have the same Aggregate Unit if set
- Both Units must have the same Period / Phase if set
Processing
Load
Validate
- Validate Units
- Validate Above/Below relations
- Validate Same-as Units
Resolve
- For each Same-As relationship add all Above/Below relations to each Unit
Validate
Reduce
- Remove all redundant Above/Below relations (transitive reduction)
Aggregate
- Validate all Context Units have an Aggregate Unit
- For each Context Above/Below relation where the Aggregate Unit is different between the Above and Below Units, add an Above/Below relation between the Aggregate Units to the Subgroup matrix
- Reduce the Subgroup matrix
- Validate all Subgroup Units have an Aggregate Unit
- For each Subgroup Above/Below relation where the Aggregate Unit is different between the Above and Below Units, add an Above/Below relation between the Aggregate Units to the Group matrix
- Reduce the Group matrix