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HandWiki. Well-Known Text. Encyclopedia. Available online: https://encyclopedia.pub/entry/31572 (accessed on 22 September 2026).
HandWiki. Well-Known Text. Encyclopedia. Available at: https://encyclopedia.pub/entry/31572. Accessed September 22, 2026.
HandWiki. "Well-Known Text" Encyclopedia, https://encyclopedia.pub/entry/31572 (accessed September 22, 2026).
HandWiki. (2022, October 27). Well-Known Text. In Encyclopedia. https://encyclopedia.pub/entry/31572
HandWiki. "Well-Known Text." Encyclopedia. Web. 27 October, 2022.
Well-Known Text
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The content is sourced from: https://handwiki.org/wiki/Well-known_text

Well-known text (WKT) is a text markup language for representing vector geometry objects on a map, spatial reference systems of spatial objects and transformations between spatial reference systems. A binary equivalent, known as well-known binary (WKB), is used to transfer and store the same information on databases. The formats were originally defined by the Open Geospatial Consortium (OGC) and described in their Simple Feature Access and Coordinate Transformation Service specifications. The current standard definition is in the ISO/IEC 13249-3:2016 standard, "Information technology – Database languages – SQL multimedia and application packages – Part 3: Spatial" (SQL/MM) and ISO 19162:2015, "Geographic information – Well-known text representation of coordinate reference systems".

geospatial spatial reference vector geometry

References

  1. See the OGC Implementation Specification for geographic information – Simple Feature Access, section 6.1.11.1. http://www.opengeospatial.org/standards/sfa
  2. "Well-Known Text format (WKT) version 1". http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/doc-files/WKT.html. Retrieved 2016-11-01. 
  3. "OGC 12-063r5 Annex E". http://docs.opengeospatial.org/is/12-063r5/12-063r5.html#148. Retrieved 2016-10-01. 
  4. "OGC 12-063r5". http://docs.opengeospatial.org/is/12-063r5/12-063r5.html. Retrieved 2015-05-06. 
  5. "ISO 19162:2015". http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=63094. Retrieved 2016-11-01. 
  6. "OGC 12-063r5 Backward compatibility". http://docs.opengeospatial.org/is/12-063r5/12-063r5.html#20. Retrieved 2016-10-01. 
  7. "OGC 12-063r5 Annex C.3.3". http://docs.opengeospatial.org/is/12-063r5/12-063r5.html#144. Retrieved 2016-10-01. 
  8. "OGC 12-063r5 Annex C.4.5". http://docs.opengeospatial.org/is/12-063r5/12-063r5.html#145. Retrieved 2016-10-01. 
  9. Solr GEO support https://cwiki.apache.org/confluence/display/solr/Spatial+Search
  10. Well-Known Text (WKT) Input Type in Elasticsearch documentation https://www.elastic.co/guide/en/elasticsearch/reference/6.2/geo-shape.html#input-structure
  11. https://docs.marklogic.com/guide/search-dev/geospatial
  12. http://docs.memsql.com/docs/geospatial-guide
  13. Well-Known Text (WKT) Format, MySQL documentation http://dev.mysql.com/doc/refman/5.7/en/gis-data-formats.html
  14. https://neo4j-contrib.github.io/spatial/
  15. H2 create spatial index documentation http://www.h2database.com/html/grammar.html#create_index
  16. "HP Vertica 7.1.x Release Notes" (in en-us). https://my.vertica.com/docs/ReleaseNotes/7.1.x/HP_Vertica_7.1.x_Release_Notes.htm#HP%C2%A0Verti. 
  17. https://www.voltdb.com/company/press-releases/voltdb-adds-geospatial-query-support-industrys-innovative-fast-data-platform/
  18. https://github.com/postgis/postgis/blob/2.1.0/doc/ZMSgeoms.txt
  19. http://postgis.org/docs/ST_GeomFromEWKT.html
  20. http://e-logistic-plans.gdfsuez.com/mapguide/help/webapi/da/dc0/group___agf_text.htm
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