Contents
What is non topological format?
An ArcInfo coverage is a familiar topological data structure. A shapefile is a nontopological data structure that does not explicitly store topological relationships. However, unlike other simple graphic data structures, shapefile polygons are represented by one or more rings.
What is non topological editing?
Nontopological editing refers to a variety of basic editing operations that modify simple features and create new features from existing features. Figure 7.17.
What is topological model?
In general, a topological data model manages spatial relationships by representing spatial objects (point, line, and area features) as an underlying graph of topological primitives—nodes, faces, and edges.
What is a non topological overlay?
In a non topological data structure, a shared boundary is stored once for each polygons. In a topological data structure, a shared boundaries is stored once, with attributes about its right and left objects. https://gis.stackexchange.com/questions/163431/what-is-nontopological-geometry/163435#163435.
Where do I find the term nontopological geometry?
Here is a little from the documentation where I found the term nontopological which may have its source the ESRI Shapefile Technical Description (page 1). A shapefile stores nontopological geometry and attribute information for the spatial features in a data set.
How is nontopological geometry stored in a shapefile?
A shapefile stores nontopological geometry and attribute information for the spatial features in a data set. The geometry for a feature is stored as a shape comprising a set of vector coordinates.
What do you need to know about topological geometry?
Topological geometry deals with incidence structures consisting of a point set and a family of subsets of called lines or circles etc. such that both and carry a topology and all geometric operations like joining points by a line or intersecting lines are continuous.
Can a geometry be modified without affecting its topology?
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 tool/data explicitly handles to topology internally.