> For the complete documentation index, see [llms.txt](https://docs.geodin.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.geodin.com/concepts/borehole-and-location-model.md).

# Borehole and Location Model

The **General Data** section of a GeoDin object holds the headline record for a borehole or location: identifiers, project context, geometry, and the drilling/sampling metadata that all downstream tables hang off.

For the related concepts, see also:

* [Layer and Stratigraphy](/concepts/layer-and-stratigraphy.md) - soil/rock layers and ground descriptions attached to a location.
* [Sample and Specimen Model](/concepts/sample-and-specimen-model.md) - samples taken from a location.
* [Object Types](/concepts/object-types.md) - G1, AGS, and other object-type families.

## What General Data holds

* **Identifiers and project context:** borehole name, location name, project title, report number, client, method.
* **Geometry:** coordinates, coordinate system, depth, ground level, penetration, recovery.
* **Drilling information:** vessel, drilling method, drilling standard, start time, pressure on instrument, drilling tool type, auger/bit type, diameter.

## Compulsory fields

Compulsory fields (e.g. `Method` in general data) appear in a darker purple colour. Saving a record without a compulsory field triggers a validation error that names the missing field - the record cannot be persisted until the field is supplied.


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