What belongs in GIS?
GIS is one way of representing knowledge. Not every taonga, kōrero or relationship with whenua becomes more useful by turning it into a point, line, polygon or database record.
The useful starting question is what the kaupapa needs the GIS to do. Sometimes precise geometry matters. Sometimes a broad locality, source reference, narrative or no spatial feature at all represents the material better.
Start with the job the map needs to do
Different purposes call for different representations. GIS may support:
- environmental restoration and kaitiakitanga
- planning and consent work
- place-name research
- Treaty research
- site protection
- operational asset management
- emergency planning
- whānau access to information
- connections between people, kōrero and place
A clear purpose also makes it easier to decide how much detail is useful and which information adds little to the result.
Questions that help shape the representation
| Question | What it helps clarify |
|---|---|
| What is the kaupapa? | what the GIS needs to contribute |
| Whose relationships and knowledge are involved? | the context that should remain visible |
| What decision or activity will use the result? | the level of detail that is useful |
| Does geometry represent this material well? | whether GIS is the right container |
| What could precise location reveal? | whether a generalised representation would work better |
| What changes when this is combined with other data? | inference and context |
| Who is the audience for this version? | what belongs in the output |
| Where will copies and exports end up? | how the working and shared versions differ |
| Can the material and its context be recovered later? | portability and continuity |
| Who will understand the work after the current project? | handover and succession |
These are design questions, not a universal checklist that can decide the kaupapa from outside it.
Geometry is not always the best representation
Some material may work better as:
- narrative or kōrero
- an archival reference
- a broad named locality
- a generalised area
- an image without precise location
- relationships between places rather than a hard boundary
- a record that source material exists without copying all of it into the GIS
- an offline or non-digital record
Maps are good at making spatial patterns visible. They are less good at carrying movement, seasonal use, layered histories, whakapapa and overlapping relationships unless those things are deliberately kept in the representation.
Precision follows purpose
A public education map and a working operational layer can legitimately use different spatial detail.
For example, a broad area may be enough to communicate that a landscape contains cultural values. A project dealing with physical works may need a more precise working location. Those are different products serving different jobs.
A practical pattern is:
- keep the best available working record with its source and context
- create other representations at the level of detail useful for each audience and purpose
See Spatial masking.
A useful decision path
Working and public versions can differ
A map for a hearing, an internal cultural database and a public education map may show different versions of the same underlying material. That difference is not necessarily an error. It reflects different purposes and audiences.
Likewise, leaving precise detail out of a public map does not require removing it from a working record where it remains useful. Retaining every detail forever is not automatically useful either. Purpose, provenance and future use provide the context for those choices.
Related pages
Sources
- Te Mana Raraunga — Principles of Māori Data Sovereignty
- Te Kāhui Raraunga — Māori Data Governance Model
- Global Indigenous Data Alliance — CARE Principles
Last reviewed: 25 August 2026