what means by ring counter of a polygon.. and what means by ring counter = 1 of a polygon? any one can tell me by drawing an example..
closed as off topic by Andres Caicedo, Arturo Magidin, Aryabhata, Ross Millikan, Qiaochu Yuan Jan 4 '11 at 17:35
Questions on Mathematics Stack Exchange are expected to relate to math within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.
I think you will find of interest the comments on "rings" and other pseudo-geometric objects constituting the nonrigorous geometrical foundations of various spatial reasoning systems: Polygons: the unstable foundation of spatial modeling.
For basic background on the 9-intersection model see: Egenhofer, M. and Herring, J. Categorizing binary topological relationships between regions, lines and points in geographic databases.
|show 3 more comments|
Given your link, and also this page, it seems that "ring" refers to the boundaries of a plane polygon, which are homeomorphic to circles. "Outside ring" and "inside rings" refer to the outside boundary and to any boundaries surrounding holes on the inside of the polygon (making it homeomorphic to punctured discs). The page does not contain any instance of "counter", but presumably it refers to a "counter" in the sense of computer science: an inner count of how many 'rings' are being specified for the polygon ($n+1$, where $n$ is the number of "holes"). Your question seems to me to be off-topic.