Site geology
Site geology is one of Demiton's published registers for Australian civil construction. Ground conditions and geology recorded for a site. Demiton keeps it current from the systems a contractor already runs and publishes the record's shape as a versioned JSON Schema, so the same question works whichever system produced the record.
Part of Projects in the register catalog.
- Register ID
site_geologyUse this name to ask for the register. The API calls it a shelf ID.- Each record is
- A stateThe current value of something, replaced when it changes.
- Status
- DeclaredDefined, and fills when a source produces its first record.
- Data
- OrganisationPrivate to each organisation's own workspace.
- Version
- v1 (1.0.2)Current version.
Standards
This register's contract was designed against these standards and laws. Holding these records does not by itself certify compliance.
- AHD / AUSGeoid2020Australian Height Datum with AUSGeoid2020 separation model
- AS 1289 seriesMethods of testing soils for engineering purposes
- AS 1726:2017Geotechnical site investigations
- AS 5488.1:2022Classification of Subsurface Utility Information (SUI)
- GDA2020 / MGA2020Geocentric Datum of Australia 2020 and Map Grid of Australia 2020
- National Measurement (Recognized-Value Standard of Measurement of Position) Determination 2017Legal definition of GDA2020 under National Measurement Act 1960 (Cth) s 8A
- INSPIRE Data Specification on Coordinate Reference Systems (D2.8.I.1)INSPIRE CRS Technical Guidelines: ETRS89 horizontal, EVRS vertical
- EPSG Geodetic Parameter DatasetIOGP CRS registry (EPSG:7844 GDA2020, EPSG:7855 MGA zone 55, EPSG:4326 WGS 84 ensemble)
- ISO 14688-1:2017 / ISO 14688-2:2017Geotechnical investigation and testing - Identification and classification of soil
- RFC 7946The GeoJSON Format
- NZGD2000 / NZTM2000 / NZVD2016New Zealand Geodetic Datum 2000, NZ Transverse Mercator 2000, NZ Vertical Datum 2016 (NZGeoid2016)
- AGS 4.2Electronic Transfer of Geotechnical and Geoenvironmental Data
- BS 5930:2015+A1:2020Code of practice for ground investigations
- OSGB36 / ETRS89 / OSTN15 / OSGM15 (ODN)Ordnance Survey National Grid, ETRS89 and the definitive transformations
- ASTM D2487-17(2025)Classification of Soils for Engineering Purposes (USCS)
- ASTM D2488Description and Identification of Soils (Visual-Manual Procedures)
- DIGGSData Interchange for Geotechnical and Geoenvironmental Specialists
- NAD 83(2011) / NAVD 88 (NSRS)US official horizontal and vertical datums, being replaced by NATRF2022 et al.
Connectors
Connected today
Demiton keeps this register current from these systems now.
No system fills this register yet.
On the roadmap
Systems in the planned connector rollout that can fill this register. Partial means the system holds only some of its fields.
None planned yet.
Fields
15 fields: 4 required, 11 optional.
Required
Every record carries these fields.
- contentText
The prose answer a content search can match.
Example:
Site is underlain by the Bandanna Formation - interbedded…- projectText
The project whose site coordinate was resolved.
Example:
BWG-2025-001- map_sourceText
Which map service actually answered (1:100k state service vs 1:1M national fallback)
Example:
Geoscience Queensland 1:100,000 series- formation_nameText
The named surface geology unit under the site.
Example:
Bandanna Formation
Optional
Present when the source system records them.
- ageText
The unit's geological age / period.
Example:
Permian- lithologyText
Prose lithology description of the unit.
Example:
Interbedded sandstone, siltstone, mudstone and coal- map_scaleWhole number
Nominal scale of the product the answer came from;
nullwhere the product is a compilation with no single scale.Example:
100000- map_symbolText
The map sheet's unit symbol/code for the unit.
Example:
Pb- resolved_atDate and time
When the coordinate was resolved.
Example:
2026-02-10T01:00:00Z- source_formatText
The exchange format/version the answer came from (AGS 4.2, DIGGS 2.6, DIGGS 3.0, vendor/map service)
Example:
vendor/map service- vertical_datumText
The vertical reference the source depths/heights are relative to (AHD in Australia)
Example:
AHD- projection_zoneText
The grid projection and zone, where the source states one.
Example:
MGA2020 Zone 55- horizontal_datumText
The datum the source coordinate is in (GDA2020 today)
Example:
GDA2020- resolver_versionText
Which resolver contract produced the answer.
Example:
geology-resolver-v3- classification_schemeText
Which classification vocabulary the description/symbol follows (e.g. AS 1726:2017, BS 5930:2015+A1:2020, ASTM D2487-17(2025))
Example:
AS 1726:2017
Filed against
Records are indexed along these dimensions, so they can be asked for by any of them.
- Projectwhat the record is about, from
Always set
Example record
A sample from Bridgeworks Group, Demiton's demonstration company. The values are illustrative; the shape is exactly what the contract describes.
{ "age": "Permian", "classification_scheme": "AS 1726:2017", "content": "Site is underlain by the Bandanna Formation - interbedded sandstone, siltstone and coal measures of Permian age.", "formation_name": "Bandanna Formation", "horizontal_datum": "GDA2020", "lithology": "Interbedded sandstone, siltstone, mudstone and coal", "map_scale": 100000, "map_source": "Geoscience Queensland 1:100,000 series", "map_symbol": "Pb", "project": "BWG-2025-001", "projection_zone": "MGA2020 Zone 55", "resolved_at": "2026-02-10T01:00:00Z", "resolver_version": "geology-resolver-v3", "source_format": "vendor/map service", "vertical_datum": "AHD"}Use this contract
The contract is a standard JSON Schema (draft 2020-12) document, so any JSON Schema validator can check a record against it. Keywords starting with x-demiton- add Demiton's own meaning, such as units and requiredness, and validators ignore them.
https://docs.demiton.io/registers/site_geology/v1.jsonShow the full JSON Schema
Loading the schema…
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