Geological lines (contacts, faults, linears), geological polygons (rock units and alteration or metamorphism) and geological points (outcrops and structure data) derived from existing reports, 1:25,000 1:50,000 and 1:63,360 scale printed maps, new field mapping and interpretation of aerial photography, remote sensing data and airborne geophysical data. Digital data is available as a seamless layer, with the understanding that it may include unresolved edge-matching issues originating from mapping project boundaries in the source data. The digital data is used to produce the Digital Geological Atlas 1:25,000 Scale map series.

Data derived from existing printed maps and reports of various scales, new field mapping and interpretation of aerial photography, remote sensing data and airborne geophysical data. Data has been compiled to fit the Land Information System Tasmania (LIST) digital topographic base.

Position Accuracy: Historic data used aerial photography together with available topographic maps (commonly at 1:10,000 and 1:100,000). Current methods include GPS, rectified aerial photography and digital 1:25,000 topography, giving position to within +-25m. Attribute Accuracy: Database has not been verified, but database contains an attribute describing reliability. Logical Consistency: All polygons, lines and point data attributed. All vertices are snapped and all polygons close. All data is topologically related. There are no duplicates Completeness: Approximately 70% of the state has been completed as at September 2023.