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- Geospatial_topology abstract "Geospatial topology studies the rules concerning the relationships between the points, lines, and polygons that represent the features of a geographic region. For example, where two polygons represent adjacent counties, typical topological rules would require that the counties share a common boundary with no gaps and no overlaps. Similarly, it would be nonsense to allow two polygons representing lakes to overlap.In spatial analysis the topological spatial relations are derived from the DE-9IM model, as spatial predicates about relations between points, lines, and/or areas: Equals, Contains, Covers, CoveredBy, Crosses, Disjoint, Intersects, Overlaps, Touches and Within. In network and graph representations the topology analysis is about topological objects such as faces, edges and nodes.The ESRI White Paper GIS Topology explains that topology operations are used to manage shared geometry, define and enforce data integrity rules, support topological relationship queries and navigation, and build more complex shapes such as polygons, from primitive ones such as lines. A GIS for Educators worksheet at Linfiniti adds the detection and correction of digitising errors and carrying out network analysis. Topological error correction is explained in more detail in a paper by Ubeda and Egenhofer.Unlike GML, topologies are not directly represented in ESRI shapefiles which store individual geometric objects in isolation. Topological processing can, however, be undertaken in GIS software such as GRASS GIS or QGIS or could in principle be enforced using integrity constraints in a GIS-enabled DBMS such as PostGIS. However, as Riedemann (2004) explains, topological operators are inherently complex and their implementation requires care to be taken with usability and conformance to standards.Oracle and PostGIS provide fundamental topological operators allowing applications to test for "such relationships as contains, inside, covers, covered by, touch, and overlap with boundaries intersecting." Unlike the PostGIS documentation, the Oracle documentation draws a distinction between "topological relationships [which] remain constant when the coordinate space is deformed, such as by twisting or stretching" and "relationships that are not topological [which] include length of, distance between, and area of." These operators are leveraged by applications to ensure that data sets are stored and processed in a topologically correct fashion.".
- Geospatial_topology wikiPageExternalLink Topology.html.
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- Geospatial_topology wikiPageRevisionID "663170519".
- Geospatial_topology wikiPageWikiLink Category:Cartography.
- Geospatial_topology wikiPageWikiLink Category:Geographic_information_systems.
- Geospatial_topology wikiPageWikiLink Category:Spatial_data_analysis.
- Geospatial_topology wikiPageWikiLink Category:Topology.
- Geospatial_topology wikiPageWikiLink DBMS.
- Geospatial_topology wikiPageWikiLink DE-9IM.
- Geospatial_topology wikiPageWikiLink Data_integrity.
- Geospatial_topology wikiPageWikiLink Database.
- Geospatial_topology wikiPageWikiLink Digitising.
- Geospatial_topology wikiPageWikiLink Digitizing.
- Geospatial_topology wikiPageWikiLink ESRI.
- Geospatial_topology wikiPageWikiLink ESRI_shapefile.
- Geospatial_topology wikiPageWikiLink Esri.
- Geospatial_topology wikiPageWikiLink GIS.
- Geospatial_topology wikiPageWikiLink GRASS_GIS.
- Geospatial_topology wikiPageWikiLink Geographic_information_system.
- Geospatial_topology wikiPageWikiLink Geography_Markup_Language.
- Geospatial_topology wikiPageWikiLink Graph_(mathematics).
- Geospatial_topology wikiPageWikiLink Network_theory.
- Geospatial_topology wikiPageWikiLink Oracle_Database.
- Geospatial_topology wikiPageWikiLink PostGIS.
- Geospatial_topology wikiPageWikiLink QGIS.
- Geospatial_topology wikiPageWikiLink Shapefile.
- Geospatial_topology wikiPageWikiLink Spatial_relation.
- Geospatial_topology wikiPageWikiLink Spatial_relations.
- Geospatial_topology wikiPageWikiLink Topology.
- Geospatial_topology wikiPageWikiLinkText "Geospatial topology".
- Geospatial_topology wikiPageWikiLinkText "Topology".
- Geospatial_topology wikiPageWikiLinkText "connective".
- Geospatial_topology wikiPageWikiLinkText "geospatial topology".
- Geospatial_topology wikiPageWikiLinkText "topological".
- Geospatial_topology wikiPageWikiLinkText "topology".
- Geospatial_topology hasPhotoCollection Geospatial_topology.
- Geospatial_topology wikiPageUsesTemplate Template:Reflist.
- Geospatial_topology subject Category:Cartography.
- Geospatial_topology subject Category:Geographic_information_systems.
- Geospatial_topology subject Category:Spatial_data_analysis.
- Geospatial_topology subject Category:Topology.
- Geospatial_topology type Type.
- Geospatial_topology type Field.
- Geospatial_topology type Type.
- Geospatial_topology comment "Geospatial topology studies the rules concerning the relationships between the points, lines, and polygons that represent the features of a geographic region. For example, where two polygons represent adjacent counties, typical topological rules would require that the counties share a common boundary with no gaps and no overlaps.".
- Geospatial_topology label "Geospatial topology".
- Geospatial_topology sameAs طوبولوجيا_جغرافية_مكانية.
- Geospatial_topology sameAs Topología_geoespacial.
- Geospatial_topology sameAs m.0fhbw7.
- Geospatial_topology sameAs Jeo_uzam_topolojisi.
- Geospatial_topology sameAs Q5548550.
- Geospatial_topology sameAs Q5548550.
- Geospatial_topology wasDerivedFrom Geospatial_topology?oldid=663170519.
- Geospatial_topology isPrimaryTopicOf Geospatial_topology.