TopoJSON represents geometries as a collection of shared line segments called arcs, as referenced by zero-based index. For detailed information about the TopoJSON format, see the TopoJSON Format Specification on GitHub. The paragraph below gives an overview of TopoJSON syntax. This limitation makes GeoJSON less suitable than TopoJSON for applications that focuses on efficiency and compactness. However, unlike GeoJSON, TopoJSON reduces redundancies for related geometries by representing overlapping edges without duplication. Like the GeoJSON (Geographic JavaScript Object Notation) Reader/Writer, spatial data in JSON is identified using key/value pairs. TopoJson is an extension to GeoJSON that utilizes topology. Licensing options for this format begin with FME Professional Edition.įME can read and write data in the TopoJSON (Topology JavaScript Object Notation) format. You are here: TopoJSON (Topology JavaScript Object Notation) Reader/Writer
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