ARKmatrix

Strat Units

Unit Attributes

• ID
• Label
• Class
• Type
• Status
• Site Code
• Aggregate Unit
• Period / Phase

Unit Class:

• Context
• Subgroup
• Group
• Landuse

Unit Type:

• Undefined
• Deposit
• Fill
• Cut
• Masonry
• Skeleton
• Timber

Unit Status:

• Allocated
• Assigned
• Void

Strat Relations

• Above / Below (directed graph)
• Same-As (undirected graph)
• Contemporary With (undirected graph)

Rules / Heuristics

Any Relations:

• Cannot be between same Unit
• Both Units must be same Class

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

Development Plans

Some other notes: http://archaeologic.al/wiki/Harris_Matrix https://github.com/anvaka/graph-drawing-libraries https://github.com/ArsMasiuk/qvge