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What is the difference between GEOJSON and TOPOJSON?

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What is the difference between GEOJSON and TOPOJSON?
posted Oct 24 by anonymous

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GeoJSON is an open standard format designed for representing simple geographical features, along with their non-spatial attributes. It is based on JSON, the JavaScript Object Notation.

TopoJSON is an extension of GeoJSON. TopoJSON introduces a new type, "Topology", that contains GeoJSON objects. A topology has an objects map which indexes geometry objects by name. These are standard GeoJSON objects, such as polygons, multi-polygons and geometry collections.

answer Nov 29 by Venkatesh Reddy
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