Kotahi te aho ka whati, ki te kāpuia e kore e whati.
One strand of flax is easy to break, but many strands together will stand strong.
— Kīngi Tāwhiao
The New Zealand Land Use and Management (NZLUM) classification system adapts the Australian Land Use and Management (ALUM) classification for New Zealand.
Classes in NZLUM are hierarchical by design, this allows for both the aggregation of broad land-use categories and the disaggregation of specific subclasses for analysis and reporting.
ALUM provides a strong data structure for standardisation. Its CC-BY 3.0 Australia Licence explicitly allows adaptation.
While some ALUM classes are retained, and the basic structre of the classification system is familiar, NZLUM significantly adapts some classes and adds new classes and attributes relevant to New Zealand.
Key Changes from ALUM v8:
Irrigation removed as a primary class; it is now a management practice attribute.
Water removed as a primary class; it is now treated as a independent attribute.
The rationale for this adjustment is to recognise situations where water is a land cover occuring on a wider land use (such as a reservoir on a farm), and to recognise irrigation more consistently as a farm management practice, and not a land-use in itself.
Rather than defining water as a land-use class, as in ALUM, NZLUM records it as an attribute with a controlled vocabulary (i.e. using terms, lake, reservoir, river, wetland, marine).
including subtypes (e.g., lake hydro).
NZLUM follows ALUM’s approach of using attributes of land-use to record additional information. These take the form of “land management practices” or “commodities”, and adopt defined terminology.
Such attributes are considered optional, but they should be included where information permits.
Commodity: captures information about crops and livestock (useful for biosecurity, economic modelling, nutrient modelling, greenhouse gas estimation, site-selection, etc.).
Management practices: operational details such as irrigation, rotations, dairy wintering off, etc.
Tenure:land_estate and land_status reflect ownership or rights affecting land use.
Zoning: council zones, such as those proposed in the NZ Planning Standards (2019) allow the linking of planning and actual (current) use and land use potential.
Water: controlled terms describing various forms water bodies can take.
Attributes are categorical.
Nothing in this specification should prevent the extension (widening) of the data representation, e.g. to include continuous data to accomodate stocking rate information, demographic information, or other attributes.