Prequels (Travel Distance Overlay)

Prequel overlays can be linked to the Travel Distance Overlay to initiate particular parts of the model with more accuracy and detail.

Name	Prequel	Underlying data	Unit	Range	No data	Description
Blocking	BLOCKING	Travel Distance Prequel		- infinity to infinity	Clamped to range	Used for identifying whether a grid cell is blocked for traffic.
Destination	DESTINATION	Travel Distance Prequel		- infinity to infinity	Clamped to range	Used for identifying whether a grid cell is a destination.
Traversable	TRAVERSABLE	Travel Distance Prequel		- infinity to infinity	Clamped to range	Used for identifying whether a grid cell is traversable.

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Travel Distance Overlay

Model attributes

Blocking threshold • Destination threshold • Max travel distance • Road distance • Route pedestrians • Route bicycles • Route cars • Route trucks • Route trams • Route trains • Route ships • Traversable threshold

Travel features

Blocked road •  Destination area

Prequels

Blocking • Destination • Traversable

Result types

Base types • Destinations