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Documentation Index

Fetch the complete documentation index at: https://docs.less.tech/llms.txt

Use this file to discover all available pages before exploring further.

The Polygon tool produces polygons in two different ways. Pair it with Point-in-Polygon or other workflows that expect a polygon column.

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Modes

  1. From coordinates — start from a center latitude/longitude per row and call the isochrones service to build an area by driving distance or driving time.
  2. Convert from JSON — start from a column of coordinate lists and close the ring to form a polygon without calling the isochrone API.
1

Polygon mode

Select From coordinates.
2

Latitude / longitude columns

Choose numeric columns for the center point of each polygon.
3

Range type

Pick Distance (kilometers) or Time (minutes) to control how large the polygons will be. For example, an area around a point with a 100 kilometer distance from the center point to the outer ring of the area is fairly. Conversely, a 5 minute drivetime distance from the center to the outer ring of the area is comparatively small.
4

Range

Select range. Distance can be between 1–100 kilometers. Time can between 1–180 minutes.
5

Smoothing

Adjust 0–100 to simplify or round the polygon boundary; higher values yield simpler, more rounded areas/polygons.

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Outputs (summary)

  • From coordinates — input columns are preserved where applicable; a geometry column holds the isochrone polygon (TopoJSON). Failed rows may include error and error_message fields.
  • Convert from JSON — same row keys plus a geometry TopoJSON polygon per successful conversion.