CanVec: Geometric Model

From OpenStreetMap Wiki
Jump to: navigation, search
Available languages — CanVec: Geometric Model
· Afrikaans · Alemannisch · aragonés · asturianu · azərbaycanca · Bahasa Indonesia · Bahasa Melayu · Bân-lâm-gú · Basa Jawa · Baso Minangkabau · bosanski · brezhoneg · català · čeština · dansk · Deutsch · eesti · English · español · Esperanto · estremeñu · euskara · français · Frysk · Gaeilge · Gàidhlig · galego · Hausa · hrvatski · Igbo · interlingua · Interlingue · isiXhosa · isiZulu · íslenska · italiano · Kiswahili · Kreyòl ayisyen · kréyòl gwadloupéyen · Kurdî · latviešu · Lëtzebuergesch · lietuvių · magyar · Malagasy · Malti · Nederlands · Nedersaksies · norsk bokmål · norsk nynorsk · occitan · Oromoo · oʻzbekcha/ўзбекча · Plattdüütsch · polski · português · português do Brasil · română · shqip · slovenčina · slovenščina · Soomaaliga · suomi · svenska · Tiếng Việt · Türkçe · Vahcuengh · vèneto · Wolof · Yorùbá · Zazaki · српски / srpski · беларуская · български · қазақша · македонски · монгол · русский · тоҷикӣ · українська · Ελληνικά · Հայերեն · ქართული · नेपाली · मराठी · हिन्दी · অসমীয়া · বাংলা · ਪੰਜਾਬੀ · ગુજરાતી · ଓଡ଼ିଆ · தமிழ் · తెలుగు · ಕನ್ನಡ · മലയാളം · සිංහල · ไทย · မြန်မာဘာသာ · ລາວ · ភាសាខ្មែរ · ⵜⴰⵎⴰⵣⵉⵖⵜ · አማርኛ · 한국어 · 日本語 · 中文(简体)‎ · 吴语 · 粵語 · 中文(繁體)‎ · ייִדיש · עברית · اردو · العربية · پښتو · سنڌي · فارسی · ދިވެހިބަސް

Canvec Product - geometric model

The proposed geometric model provides a partial integration of geometries. This is a compromise between a fully integrated model and a self-contained geometry model.


Self-contained model: all geometries are complete by themselves. Overlapping lines segments are duplicated. Coordinates (nodes) at intersections are also duplicated. The model however allows the selection of a subset of entities for data import. A disadvantage is that it isn't possible to use polygons with holes.

Full integration model: none of the geometries is duplicated, including nodes. All adjacent entities must however be formed by relations - multipolygon or route type. The model does not allow the selection of a subset of entities for data import. Everything must be imported at the same time.

Partial integration model: all geometries are complete by themselves. Integration at coordinate level eliminates duplicate nodes. Overlapping lines segments are duplicated. The model however allows the selection of a subset of entities for data import.



Graphically, the proposed model can be described as below
ModelCanvecOsm.png


For discussions about the proposed model, please use the Talk:CanVec:_Geometric_Model page