@mapbox/graph-normalizer

Graph-normalizer

In this latest v2 version, graph-normalizer is a Command Line Interface that pipes in a geojson file of ways (usually at the z7 level), and outputs normalized pieces of graph at the z14 level.

This package is intended as a utility for graph-tiler.

Installation

npm install @mapbox/graph-normlizer

Usage

node_modules/graph-normalizer/bin/normalize-ways \
  --waysFile <geojson line-delimited ways file> \
  --outputPath <output path> \
  --zoomLevel <output zoom level - default 14>

The output is a number of files, each named by its quadkey, of line-delimited geojson way features.

It satisfies the following constraints:

• All way geometries in the original road network have an equivalent in the normalized graph.
• No intersection ever lies within a normalized way, only at its ends.
• Normalized way ids keep track of the history of transformations that led to it.

Edges that are shared by multiple tiles are conserved in all of them.