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Most tools stop at closed tracts. The BoundaryLogic API also plots easements described from a centerline, which is where utility, pipeline, and access easement work actually lives.
How centerline descriptions plot
A strip or corridor easement description does not close. It runs a centerline on bearings and distances and states a width. The API generates the geometry by offsetting that centerline, carrying curves through the offsets. A 30 foot access easement comes back as a centerline with offset edges, plotted over the base tract.
Variable width is handled where the width is stated geometrically: the description changes width against a course or a described point.
What is out of scope, stated plainly
- Width changes referenced to stations are not handled. A description that transitions width by station cannot be processed directly.
- Spiral curves are not handled.
Both are routine in highway right of way descriptions, so treat stationing language in a source document as a signal the description sits outside direct processing. In a backlog, raise it early; finding it in scoping is cheap.
Corridor work that fits: utility easements, pipeline easements, and access easements whose centerline runs on bearings and distances with the width stated geometrically.