GeoPath class
A geometry geographic generator for creating paths.
It is similar to the shape generators in d3-shape: given a GeoJSON geometry or feature object, it generates an SVG path data string or renders the path to a Canvas. Canvas is recommended for dynamic or interactive projections to improve performance. Paths can be used with projections or transforms, or they can be used to render planar geometry directly to Canvas or SVG.
Constructors
- GeoPath([GeoTransform? transform, GeoPathContext? context])
- Creates a new geographic path generator with the default settings.
Properties
- context ↔ GeoPathContext?
-
Context used to render the path.
getter/setter pair
- hashCode → int
-
The hash code for this object.
no setterinherited
- pointRadius ↔ double Function(Map?)
-
A function which is computed per feature and used to display Point and
MultiPoint geometries with the radius being the returned number.
getter/setter pair
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- transform ↔ GeoTransform?
-
A transform applied to any input geometry before it is rendered.
getter/setter pair
Methods
-
area(
Map object) → double -
Returns the projected planar area (typically in square pixels) for the
specified GeoJSON
object. -
bounds(
Map object) → List< List< num> > -
Returns the projected planar bounding box (typically in pixels) for the
specified GeoJSON
object. -
call(
[Map? object]) → Object? -
Renders the given
object, which may be any GeoJSON feature or geometry object: -
centroid(
Map object) → List< double> -
Returns the projected planar centroid (typically in pixels) for the
specified GeoJSON
object. -
measure(
Map object) → double -
Returns the projected planar length (typically in pixels) for the
specified GeoJSON
object. -
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