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d3-geo

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d3-geo - npm Package Compare versions

Comparing version 1.6.1 to 1.6.2

6

build/d3-geo.min.js

@@ -1,3 +0,3 @@

// https://d3js.org/d3-geo/ Version 1.6.1. Copyright 2017 Mike Bostock.
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4

package.json
{
"name": "d3-geo",
"version": "1.6.1",
"version": "1.6.2",
"description": "Shapes and calculators for spherical coordinates.",

@@ -42,4 +42,4 @@ "keywords": [

"topojson-client": "2",
"uglify-js": "2"
"uglify-js": "^2.8.11"
}
}

46

README.md

@@ -15,3 +15,3 @@ # d3-geo

The projection of polygons and polylines must also deal with the topological differences between the sphere and the plane. Some projections require cutting geometry that [crosses the antimeridian](https://bl.ocks.org/mbostock/3788999), while others require [clipping geometry to a great circle](http://bl.ocks.org/mbostock/3021474).
The projection of polygons and polylines must also deal with the topological differences between the sphere and the plane. Some projections require cutting geometry that [crosses the antimeridian](https://bl.ocks.org/mbostock/3788999), while others require [clipping geometry to a great circle](https://bl.ocks.org/mbostock/3021474).

@@ -53,3 +53,3 @@ Spherical polygons also require a [winding order convention](https://bl.ocks.org/mbostock/a7bdfeb041e850799a8d3dce4d8c50c8) to determine which side of the polygon is the inside: the exterior ring for polygons smaller than a hemisphere must be clockwise, while the exterior ring for polygons [larger than a hemisphere](https://bl.ocks.org/mbostock/6713736) must be anticlockwise. Interior rings representing holes must use the opposite winding order of their exterior ring. This winding order convention is also used by [TopoJSON](https://github.com/topojson) and [ESRI shapefiles](https://github.com/mbostock/shapefile); however, it is the **opposite** convention of GeoJSON’s [RFC 7946](https://tools.ietf.org/html/rfc7946#section-3.1.6). (Also note that standard GeoJSON WGS84 uses planar equirectangular coordinates, not spherical coordinates, and thus may require [stitching](https://github.com/d3/d3-geo-projection/blob/master/README.md#geostitch) to remove antimeridian cuts.)

The geographic path generator, [d3.geoPath](#geoPath), is similar to the shape generators in [d3-shape](https://github.com/d3/d3-shape): given a GeoJSON geometry or feature object, it generates an SVG path data string or [renders the path to a Canvas](http://bl.ocks.org/mbostock/3783604). Canvas is recommended for dynamic or interactive projections to improve performance. Paths can be used with [projections](#projections) or [transforms](#transforms), or they can be used to render planar geometry directly to Canvas or SVG.
The geographic path generator, [d3.geoPath](#geoPath), is similar to the shape generators in [d3-shape](https://github.com/d3/d3-shape): given a GeoJSON geometry or feature object, it generates an SVG path data string or [renders the path to a Canvas](https://bl.ocks.org/mbostock/3783604). Canvas is recommended for dynamic or interactive projections to improve performance. Paths can be used with [projections](#projections) or [transforms](#transforms), or they can be used to render planar geometry directly to Canvas or SVG.

@@ -105,3 +105,3 @@ <a href="#geoPath" name="geoPath">#</a> d3.<b>geoPath</b>([<i>projection</i>[, <i>context</i>]]) [<>](https://github.com/d3/d3-geo/blob/master/src/path/index.js "Source")

Returns the projected planar centroid (typically in pixels) for the specified GeoJSON *object*. This is handy for, say, labeling state or county boundaries, or displaying a symbol map. For example, a [noncontiguous cartogram](http://bl.ocks.org/mbostock/4055908) might scale each state around its centroid. This method observes any clipping performed by the [projection](#path_projection); see [*projection*.clipAngle](#projection_clipAngle) and [*projection*.clipExtent](#projection_clipExtent). This is the planar equivalent of [d3.geoCentroid](#geoCentroid).
Returns the projected planar centroid (typically in pixels) for the specified GeoJSON *object*. This is handy for, say, labeling state or county boundaries, or displaying a symbol map. For example, a [noncontiguous cartogram](https://bl.ocks.org/mbostock/4055908) might scale each state around its centroid. This method observes any clipping performed by the [projection](#path_projection); see [*projection*.clipAngle](#projection_clipAngle) and [*projection*.clipExtent](#projection_clipExtent). This is the planar equivalent of [d3.geoCentroid](#geoCentroid).

@@ -114,5 +114,5 @@ <a href="#path_measure" name="path_measure">#</a> <i>path</i>.<b>measure</b>(<i>object</i>) [<>](https://github.com/d3/d3-geo/blob/master/src/path/measure.js "Source")

If a *projection* is specified, sets the current projection to the specified projection. If *projection* is not specified, returns the current projection, which defaults to null. The null projection represents the identity transformation: the input geometry is not projected and is instead rendered directly in raw coordinates. This can be useful for fast rendering of [pre-projected geometry](http://bl.ocks.org/mbostock/5557726), or for fast rendering of the equirectangular projection.
If a *projection* is specified, sets the current projection to the specified projection. If *projection* is not specified, returns the current projection, which defaults to null. The null projection represents the identity transformation: the input geometry is not projected and is instead rendered directly in raw coordinates. This can be useful for fast rendering of [pre-projected geometry](https://bl.ocks.org/mbostock/5557726), or for fast rendering of the equirectangular projection.
The given *projection* is typically one of D3’s built-in [geographic projections](#projections); however, any object that exposes a [*projection*.stream](#projection_stream) function can be used, enabling the use of [custom projections](http://bl.ocks.org/mbostock/5663666). See D3’s [transforms](#transforms) for more examples of arbitrary geometric transformations.
The given *projection* is typically one of D3’s built-in [geographic projections](#projections); however, any object that exposes a [*projection*.stream](#projection_stream) function can be used, enabling the use of [custom projections](https://bl.ocks.org/mbostock/5663666). See D3’s [transforms](#transforms) for more examples of arbitrary geometric transformations.

@@ -162,3 +162,3 @@ <a href="#path_context" name="path_context">#</a> <i>path</i>.<b>context</b>([<i>context</i>]) [<>](https://github.com/d3/d3-geo/blob/master/src/path/index.js#L52 "Source")

If *angle* is specified, sets the projection’s clipping circle radius to the specified angle in degrees and returns the projection. If *angle* is null, switches to [antimeridian cutting](http://bl.ocks.org/mbostock/3788999) rather than small-circle clipping. If *angle* is not specified, returns the current clip angle which defaults to null. Small-circle clipping is independent of viewport clipping via [*projection*.clipExtent](#projection_clipExtent).
If *angle* is specified, sets the projection’s clipping circle radius to the specified angle in degrees and returns the projection. If *angle* is null, switches to [antimeridian cutting](https://bl.ocks.org/mbostock/3788999) rather than small-circle clipping. If *angle* is not specified, returns the current clip angle which defaults to null. Small-circle clipping is independent of viewport clipping via [*projection*.clipExtent](#projection_clipExtent).

@@ -183,7 +183,7 @@ <a href="#projection_clipExtent" name="projection_clipExtent">#</a> <i>projection</i>.<b>clipExtent</b>([<i>extent</i>]) [<>](https://github.com/d3/d3-geo/blob/master/src/projection/index.js#L56 "Source")

If *rotation* is specified, sets the projection’s [three-axis rotation](http://bl.ocks.org/mbostock/4282586) to the specified *angles*, which must be a two- or three-element array of numbers [*lambda*, *phi*, *gamma*] specifying the rotation angles in degrees about [each spherical axis](http://bl.ocks.org/mbostock/4282586). (These correspond to [yaw, pitch and roll](http://en.wikipedia.org/wiki/Aircraft_principal_axes).) If the rotation angle *gamma* is omitted, it defaults to 0. See also [d3.geoRotation](#geoRotation). If *rotation* is not specified, returns the current rotation which defaults [0, 0, 0].
If *rotation* is specified, sets the projection’s [three-axis rotation](https://bl.ocks.org/mbostock/4282586) to the specified *angles*, which must be a two- or three-element array of numbers [*lambda*, *phi*, *gamma*] specifying the rotation angles in degrees about [each spherical axis](https://bl.ocks.org/mbostock/4282586). (These correspond to [yaw, pitch and roll](http://en.wikipedia.org/wiki/Aircraft_principal_axes).) If the rotation angle *gamma* is omitted, it defaults to 0. See also [d3.geoRotation](#geoRotation). If *rotation* is not specified, returns the current rotation which defaults [0, 0, 0].
<a href="#projection_precision" name="projection_precision">#</a> <i>projection</i>.<b>precision</b>([<i>precision</i>]) [<>](https://github.com/d3/d3-geo/blob/master/src/projection/index.js#L76 "Source")
If *precision* is specified, sets the threshold for the projection’s [adaptive resampling](http://bl.ocks.org/mbostock/3795544) to the specified value in pixels and returns the projection. This value corresponds to the [Douglas–Peucker](http://en.wikipedia.org/wiki/Ramer–Douglas–Peucker_algorithm) distance. If *precision* is not specified, returns the projection’s current resampling precision which defaults to √0.5 ≅ 0.70710…
If *precision* is specified, sets the threshold for the projection’s [adaptive resampling](https://bl.ocks.org/mbostock/3795544) to the specified value in pixels and returns the projection. This value corresponds to the [Douglas–Peucker](http://en.wikipedia.org/wiki/Ramer–Douglas–Peucker_algorithm) distance. If *precision* is not specified, returns the projection’s current resampling precision which defaults to √0.5 ≅ 0.70710…

@@ -194,3 +194,3 @@ <a href="#projection_fitExtent" name="projection_fitExtent">#</a> <i>projection</i>.<b>fitExtent</b>(<i>extent</i>, <i>object</i>) [<>](https://github.com/d3/d3-geo/blob/master/src/projection/index.js#L80 "Source")

For example, to scale and translate the [New Jersey State Plane projection](http://bl.ocks.org/mbostock/5126418) to fit a GeoJSON object *nj* in the center of a 960×500 bounding box with 20 pixels of padding on each side:
For example, to scale and translate the [New Jersey State Plane projection](https://bl.ocks.org/mbostock/5126418) to fit a GeoJSON object *nj* in the center of a 960×500 bounding box with 20 pixels of padding on each side:

@@ -221,3 +221,3 @@ ```js

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/azimuthalEqualArea.png" width="480" height="250">](http://bl.ocks.org/mbostock/3757101)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/azimuthalEqualArea.png" width="480" height="250">](https://bl.ocks.org/mbostock/3757101)

@@ -229,3 +229,3 @@ The azimuthal equal-area projection.

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/azimuthalEquidistant.png" width="480" height="250">](http://bl.ocks.org/mbostock/3757110)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/azimuthalEquidistant.png" width="480" height="250">](https://bl.ocks.org/mbostock/3757110)

@@ -237,3 +237,3 @@ The azimuthal equidistant projection.

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/gnomonic.png" width="480" height="250">](http://bl.ocks.org/mbostock/3757349)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/gnomonic.png" width="480" height="250">](https://bl.ocks.org/mbostock/3757349)

@@ -245,3 +245,3 @@ The gnomonic projection.

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/orthographic.png" width="480" height="250">](http://bl.ocks.org/mbostock/3757125)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/orthographic.png" width="480" height="250">](https://bl.ocks.org/mbostock/3757125)

@@ -253,3 +253,3 @@ The orthographic projection.

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/stereographic.png" width="480" height="250">](http://bl.ocks.org/mbostock/3757137)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/stereographic.png" width="480" height="250">](https://bl.ocks.org/mbostock/3757137)

@@ -264,3 +264,3 @@ The stereographic projection.

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/albersUsa.png" width="480" height="250">](http://bl.ocks.org/mbostock/4090848)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/albersUsa.png" width="480" height="250">](https://bl.ocks.org/mbostock/4090848)

@@ -283,3 +283,3 @@ This is a U.S.-centric composite projection of three [d3.geoConicEqualArea](#geoConicEqualArea) projections: [d3.geoAlbers](#geoAlbers) is used for the lower forty-eight states, and separate conic equal-area projections are used for Alaska and Hawaii. Note that the scale for Alaska is diminished: it is projected at 0.35× its true relative area. This diagram by Philippe Rivière illustrates how this projection uses two rectangular insets for Alaska and Hawaii:

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/albers.png" width="480" height="250">](http://bl.ocks.org/mbostock/3734308)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/albers.png" width="480" height="250">](https://bl.ocks.org/mbostock/3734308)

@@ -291,3 +291,3 @@ The Albers’ equal area-conic projection. This is a U.S.-centric configuration of [d3.geoConicEqualArea](#geoConicEqualArea).

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/conicConformal.png" width="480" height="250">](http://bl.ocks.org/mbostock/3734321)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/conicConformal.png" width="480" height="250">](https://bl.ocks.org/mbostock/3734321)

@@ -299,3 +299,3 @@ The conic conformal projection. The parallels default to [30°, 30°] resulting in flat top. See also [*conic*.parallels](#conic_parallels).

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/conicEqualArea.png" width="480" height="250">](http://bl.ocks.org/mbostock/3734308)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/conicEqualArea.png" width="480" height="250">](https://bl.ocks.org/mbostock/3734308)

@@ -307,3 +307,3 @@ The Albers’ equal-area conic projection. See also [*conic*.parallels](#conic_parallels).

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/conicEquidistant.png" width="480" height="250">](http://bl.ocks.org/mbostock/3734317)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/conicEquidistant.png" width="480" height="250">](https://bl.ocks.org/mbostock/3734317)

@@ -319,3 +319,3 @@ The conic equidistant projection. See also [*conic*.parallels](#conic_parallels).

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/equirectangular.png" width="480" height="250">](http://bl.ocks.org/mbostock/3757119)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/equirectangular.png" width="480" height="250">](https://bl.ocks.org/mbostock/3757119)

@@ -327,3 +327,3 @@ The equirectangular (plate carrée) projection.

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/mercator.png" width="480" height="250">](http://bl.ocks.org/mbostock/3757132)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/mercator.png" width="480" height="250">](https://bl.ocks.org/mbostock/3757132)

@@ -335,3 +335,3 @@ The spherical Mercator projection. Defines a default [*projection*.clipExtent](#projection_clipExtent) such that the world is projected to a square, clipped to approximately ±85° latitude.

[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/transverseMercator.png" width="480" height="250">](http://bl.ocks.org/mbostock/5126418)
[<img src="https://raw.githubusercontent.com/d3/d3-geo/master/img/transverseMercator.png" width="480" height="250">](https://bl.ocks.org/mbostock/4695821)

@@ -430,3 +430,3 @@ The transverse spherical Mercator projection. Defines a default [*projection*.clipExtent](#projection_clipExtent) such that the world is projected to a square, clipped to approximately ±85° latitude.

Returns a [rotation function](#_rotation) for the given *angles*, which must be a two- or three-element array of numbers [*lambda*, *phi*, *gamma*] specifying the rotation angles in degrees about [each spherical axis](http://bl.ocks.org/mbostock/4282586). (These correspond to [yaw, pitch and roll](http://en.wikipedia.org/wiki/Aircraft_principal_axes).) If the rotation angle *gamma* is omitted, it defaults to 0. See also [*projection*.rotate](#projection_rotate).
Returns a [rotation function](#_rotation) for the given *angles*, which must be a two- or three-element array of numbers [*lambda*, *phi*, *gamma*] specifying the rotation angles in degrees about [each spherical axis](https://bl.ocks.org/mbostock/4282586). (These correspond to [yaw, pitch and roll](http://en.wikipedia.org/wiki/Aircraft_principal_axes).) If the rotation angle *gamma* is omitted, it defaults to 0. See also [*projection*.rotate](#projection_rotate).

@@ -433,0 +433,0 @@ <a name="_rotation" href="#_rotation">#</a> <i>rotation</i>(<i>point</i>) [<>](https://github.com/d3/d3-geo/blob/master/src/rotation.js#L35 "Source")

build/d3-geo.js

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