#274 closed enhancement (fixed)
Explain Interior, Boundary and Exterior
Reported by: | mloskot | Owned by: | kneufeld |
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Priority: | medium | Milestone: | PostGIS 1.5.0 |
Component: | postgis | Version: | |
Keywords: | Cc: |
Description
For completeness, it would be good to give short description of these three fundamental terms in the PostGIS manual:
The IBM Informix manual provides short but clear definitions of Interior, Boundary, and Exterior:
All geometries occupy a position in space defined by their interior, boundary, and exterior. * The exterior of a geometry is all space not occupied by the geometry. * The boundary of a geometry serves as the interface between its interior and exterior. * The interior is the space occupied by the geometry.
PostGIS manual could include similar.
Change History (5)
comment:1 by , 15 years ago
Owner: | changed from | to
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comment:2 by , 15 years ago
Resolution: | → fixed |
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Status: | new → closed |
comment:3 by , 15 years ago
Kevin,
This is (uncensored word here ) brilliant! I got way more than I asked for.
Just a few typos:
- eachother
- desireable
Perhaps Read from left to right could be completed with and from top to bottom too.
Also, I think it could be useful to add source reference to the Topogical/Clementini operators, PDF at Dimensionally Extended Nine-Intersection Model (DE-9IM) by Christian Strobl
Thank you!
comment:4 by , 15 years ago
…or non-URL reference to "Encyclopedia of GIS" By Hui Xiong where it is DE-9IM perfectly explained for everyone who wants to dig details.
comment:5 by , 15 years ago
Thanx Mateusz. I fixed the typos and add your noted references at the end of the section.
I like the pdf doc by Christian Stobl. Nice. I hadn't seen that one before. I was thinking along the same lines and would eventually like to see a simple de9im matrix in every spatial predicate definition (touches, crosses, within, etc) just as Christian has done in his doc. … someday
First draft is here: http://www.postgis.org/documentation/manual-1.5SVN/ch04.html#DE-9IM