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Back when shapefiles were created, the predominate data format for Esri software was the Arc/Info coverage. Coverages used topological relationships of lines to define polygons (e.g., arc 2 forward, arc 7 backward, arc 5 forward,...). This structure was very efficient from a data storage standpoint, but very inefficient for rendering polygons, since it ...


I would not apply the term "non-topological" to a geometry. Basically, the shape of a geometry can be modified without affecting its topology, but this does not imply that you do not modify the shape of a geometry when you modify its topology. I would use it for non-topological data structure or non topological geoprocessing. You have to look if the ...

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