(mysql.info) gis-wkt-format

(mysql.info) supported-spatial-data-formats

 
 16.3.1 Well-Known Text (WKT) Format
 -----------------------------------
 
 The Well-Known Text (WKT) representation of Geometry is designed to
 exchange geometry data in ASCII form.
 
 Examples of WKT representations of geometry objects:
 
    * A `Point':
 
           POINT(15 20)
 
      Note that point coordinates are specified with no separating comma.
 
    * A `LineString' with four points:
 
           LINESTRING(0 0, 10 10, 20 25, 50 60)
 
      Note that point coordinate pairs are separated by commas.
 
    * A `Polygon' with one exterior ring and one interior ring:
 
           POLYGON((0 0,10 0,10 10,0 10,0 0),(5 5,7 5,7 7,5 7, 5 5))
 
    * A `MultiPoint' with three `Point' values:
 
           MULTIPOINT(0 0, 20 20, 60 60)
 
    * A `MultiLineString' with two `LineString' values:
 
           MULTILINESTRING((10 10, 20 20), (15 15, 30 15))
 
    * A `MultiPolygon' with two `Polygon' values:
 
           MULTIPOLYGON(((0 0,10 0,10 10,0 10,0 0)),((5 5,7 5,7 7,5 7, 5 5)))
 
    * A `GeometryCollection' consisting of two `Point' values and one
      `LineString':
 
           GEOMETRYCOLLECTION(POINT(10 10), POINT(30 30), LINESTRING(15 15, 20 20))
 
 A Backus-Naur grammar that specifies the formal production rules for
 writing WKT values can be found in the OpenGIS specification document
 referenced near the beginning of this chapter.

情報カタログ

(mysql.info) supported-spatial-data-formats

(mysql.info) gis-wkb-format

より自動的に生成されましたinfo2html