WktLikeFormat class

The WKT (like) text format for coordinate and geometry objects.

Rules applied by the format are aligned with WKT (Well-known text representation of geometry) formatting of coordinate lists.

Examples:

  • point (x, y): 10.1 20.2
  • point (x, y, z): 10.1 20.2 30.3
  • point (x, y, z, m): 10.1 20.2 30.3 40.4
  • box (min-x, min-y, max-x, max-y): 10.1 10.1,20.2 20.2
  • box (min-x, min-y, min-z, max-x, max-y, maz-z):
    • 10.1 10.1 10.1,20.2 20.2 20.2
  • line string, multi point (with 2D points):
    • 10.1 10.1,20.2 20.2,30.3 30.3
  • polygon, multi line string (with 2D points):
    • (35 10,45 45,15 40,10 20,35 10)
  • multi polygon (with 2D points):
    • ((35 10,45 45,15 40,10 20,35 10))
  • coordinates for other geometries with similar principles

Note that WKT does not specify bounding box formatting. In some applications bounding boxes are formatted as polygons. An example presented above however format bounding box as a point series of two points (min, max). See also wktFormat that formats them as polygons.

When getting an encoder from text writer format objects this WktLikeFormat class provides you COULD use crs parameter to give hints (like axis order, and whether x and y must be swapped when writing) about coordinate reference system in text output. However for the WKT (like) text format such crs information is ignored, x/longitude is always printed before y/latitude regardless of crs axis order.

Constructors

WktLikeFormat()

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Constants

coordinate → const TextWriterFormat<CoordinateContent>
The WKT (like) text writer format for coordinate objects.
geometry → const TextWriterFormat<GeometryContent>
The WKT (like) text writer format for geometry objects.