Each ExcavationUnit has a UnitType describing how it is dug. TEST_PIT is a small exploratory hole used to check for buried deposits. EXCAVATION_UNIT is a controlled, measured unit (often a square) excavated in detail to recover artifacts in context. TRENCH is a long, linear cut used to expose stratigraphy or features across a span. SHOVEL_TEST_PIT is a quick, small-diameter probe dug on a grid during survey to detect sites. AUGER is a bored hole that samples deep soils and sediments where hand-digging is impractical.
Technical section
Data model, API, and internals — visible to developers.