Land occupation and transformation

A land flow says five things. Until this taxonomy the list had somewhere to put two of them.

The last three had nowhere to be, so they lived in a comma-separated flow name — and a name is a string that three source lists spell three ways. arable, non-irrigated, intensive, annual crop, non-irrigated, intensive and BAFU’s spelling of the second were three flow objects for one piece of land. Worse, a balanced pair of factors — from forest, primary at −396.7 against to forest, primary at +396.7 — was held apart by nothing but the words from and to, in a field the deduplication does not read.

Now each is a field, and two names that decompose to the same fields are the same class with no crosswalk row required. The direction being a field is what keeps the balanced pair apart: they are different values, so they mint different objects.

Every axis is an independent question about one piece of land, so the filters are read together: Cover: Forest with Intensity: Intensive is intensively managed forest, not everything that is either. Only values this build reaches are offered — a dropdown naming a regime no flow states would invite a filter that selects nothing and look no different from one that is broken.

296 of 296 classes.

Nothing here is invented. Each axis value cites a published class once — not each of the 296 classes that mention it — and a class’s citations are computed from its fields, so two classes that share a field share that field’s citation exactly and cannot drift apart.

Three authorities, split by what they can actually type. ENVO types the terrestrial cover, because the whole built environment is a single class in IUCN GET and the source lists characterise a traffic area and a dump site differently. IUCN GET types the aquatic cover, because ENVO’s terrestrial branch does not reach the sea floor or a canal. AGROVOC types the regime — irrigated against rainfed, intensive against organic, clear-felled against coppiced — because neither of the other two says anything about how land is worked. Which authority a cover cites follows its realm and is a build error rather than a preference.

exactMatch is earned, not assumed. Most covers are honestly a close or broad match, because our value is narrower or coarser than the published class; most regimes are a related match, because the AGROVOC concept is a practice and our field says the land is under it. And where the hierarchy says one class sits under another, that edge is generated by dropping a field — so the whole hierarchy is this project’s, and no edge can be published as ENVO’s or GET’s that they do not assert.

The first 40 of 296 classes. Narrow the filters above to see the rest — and each class’s own page lists its citations in full.