Rules

Run a rule as topology-checker <group> <rule>, or use rule = "<group>/<rule>" in topology.toml. topology-checker <group> <rule> --help prints the exact semantics.

Points (10)

Rule	Needs	Description	ArcGIS	QGIS
point/must-not-overlap	one point layer	Find duplicate points within the distance tolerance.	Must Be Disjoint	Must not have duplicates
point/must-not-overlap-with	two point layers	Find duplicate points across two layers within the distance tolerance.
point/must-be-inside	point layer + polygon layer	Find points outside the polygons, including points on or within the distance tolerance of their edges.	Must Be Properly Inside Polygons	Must be inside
point/must-be-covered-by-lines	point layer + line layer	Find points without covering linework, including line endpoints.	Must Be Covered By (Point-Line)	Must be covered by
point/must-be-covered-by-line-endpoints	point layer + line layer	Find points without a covering open line endpoint. Closed line parts have no endpoints.	Must Be Covered By Endpoint Of	Must be covered by endpoints of
point/must-be-covered-by-polygon-boundaries	point layer + polygon layer	Find points away from polygon edges, including holes and shared parcel edges.	Must Be Covered By Boundary Of (Point-Area)
point/must-be-covered-by-polygons	point layer + polygon layer	Find points outside polygon areas and farther than the tolerance from their edges. Boundary points are allowed.
point/must-not-be-inside-polygons	point layer + polygon layer	Find points strictly inside polygons. Points on or within tolerance of their edges are allowed.
point/must-not-intersect-lines	point layer + line layer	Find points touching linework anywhere, including endpoints, within tolerance.
point/must-not-intersect-polygons	point layer + polygon layer	Find points inside polygons or touching their edges within tolerance.

Lines (19)

Rule	Needs	Description	ArcGIS	QGIS
line/must-not-have-dangles	one line layer	Find unconnected line endpoints.	Must Not Have Dangles	Must not have dangles
line/must-not-have-pseudo-nodes	one line layer	Find joins connecting exactly two distinct features at their endpoints. Closed loops are allowed.	Must Not Have Pseudo Nodes	Must not have pseudo nodes
line/must-not-overlap	one line layer	Find shared line segments between distinct features. Crossings and overlaps within one feature are excluded.	Must Not Overlap
line/must-not-overlap-with	two line layers	Find shared line segments across two layers. Crossings are excluded.	Must Not Overlap With
line/must-not-self-overlap	one line layer	Find line segments traced more than once by the same feature, including across its parts.	Must Not Self-Overlap
line/must-not-intersect	one line layer	Find overlaps and crossings between distinct features away from their endpoints. Endpoint touches are allowed.	Must Not Intersect
line/must-not-intersect-with	two line layers	Find overlaps and crossings across two layers away from their endpoints. Endpoint touches are allowed.	Must Not Intersect With
line/must-not-intersect-or-touch-interior	one line layer	Find overlaps, crossings and endpoint touches on the interior of another feature. Touches only at both features' endpoints are allowed.	Must Not Intersect Or Touch Interior
line/must-not-intersect-or-touch-interior-with	two line layers	Find overlaps, crossings and endpoint touches on a line's interior across two layers. Touches only at both features' endpoints are allowed.	Must Not Intersect Or Touch Interior With
line/must-not-self-intersect	one line layer	Find overlaps and crossings within one feature. Closed loops and self-touches are allowed.	Must Not Self-Intersect
line/must-be-inside	line layer + polygon layer	Find line pieces outside the polygons that are longer than the distance tolerance. Lines on polygon edges are allowed.	Must Be Inside
line/endpoints-must-be-covered-by-points	line layer + point layer	Find open line endpoints without a covering point. Closed line parts have no endpoints.	Endpoint Must Be Covered By	End points must be covered by
line/must-be-covered-by-polygon-boundaries	line layer + polygon layer	Find line pieces that do not follow polygon edges, including holes and shared edges.	Must Be Covered By Boundary Of (Line-Area)
line/must-not-cross-polygon-boundaries	line layer + polygon layer	Find lines entering or leaving polygons through exterior or hole edges. Tangencies, endpoint touches and shared segments are allowed.
line/must-be-properly-inside-polygons	line layer + polygon layer	Find whole line parts that leave polygon coverage or come within tolerance of its boundary.
line/must-not-overlap-with-polygons	line layer + polygon layer	Find line pieces inside polygons or along their edges, longer than tolerance. Isolated contacts are allowed.
line/must-not-overlap-polygon-boundaries	line layer + polygon layer	Find line pieces shared with polygon edges, longer than tolerance. Crossings and isolated contacts are allowed.
line/must-not-intersect-polygons	line layer + polygon layer	Find any line contact with polygons, including interior pieces, shared edges and isolated touches within tolerance.
line/endpoints-must-be-covered-by-polygon-boundaries	line layer + polygon layer	Find open line endpoints away from polygon exterior or hole edges. Closed line parts have no endpoints.

Polygons (7)

Rule	Needs	Description	ArcGIS	QGIS
polygon/must-not-overlap	one polygon layer	Find shared areas between distinct polygon features, ignoring slivers below the tolerance.	Must Not Overlap	Must not overlap
polygon/must-not-overlap-with	two polygon layers	Find shared polygon areas across two layers, ignoring slivers below the tolerance.	Must Not Overlap With	Must not overlap with
polygon/must-not-have-gaps	one polygon layer	Find enclosed gaps between polygons, ignoring sliver gaps below the tolerance. Also report outer boundaries separately.	Must Not Have Gaps	Must not have gaps
polygon/boundaries-must-be-covered-by-lines	polygon layer + line layer	Find polygon edge pieces without covering linework, including hole edges.	Boundary Must Be Covered By (Area-Line)
polygon/must-contain-point	polygon layer + point layer	Find polygons without a strictly interior point feature. All parts of a point feature must qualify.	Contains Point	Must contain
polygon/must-contain-one-point	polygon layer + point layer	Find polygons and point features without a one-to-one interior assignment. Count feature IDs, including multipart features.	Contains One Point
polygon/must-not-contain-points	polygon layer + point layer	Find strictly contained points, with the polygon as the primary feature. Boundary points are allowed.

All geometries (2)

Rule	Needs	Description	ArcGIS	QGIS
geometry/must-not-be-multipart	one layer of any geometry type	Find features with more than one part. A Multi geometry with only one part is allowed.	Must Be Single Part (lines)	Must not have multi-part geometries
geometry/must-not-be-contained-by	two layers of any geometry type	Find whole features contained by an individual feature in the other layer. Equal geometries are allowed. No tolerance buffer is used.		Check Geometry (Contained)