ISOVIS
/
StackGenVis
10
0
Fork 0
Code Issues Pull Requests Releases 2 Wiki Activity
StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics https://doi.org/10.1109/TVCG.2020.3030352
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 Commits
1 Branch
2 Tags
1.9 GiB
Tag: Branch: Tree: 41adb35006
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '41adb35006'
${ noResults }
StackGenVis/frontend/node_modules/@turf/meta/README.md

859 lines
27 KiB
Raw Normal View History Unescape

fix the frontend
4 years ago
# @turf/meta
<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
## coordEachCallback
Callback for coordEach
Type: [Function][1]
**Parameters**
- `currentCoord` **[Array][2]&lt;[number][3]>** The current coordinate being processed.
- `coordIndex` **[number][3]** The current index of the coordinate being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed.
- `geometryIndex` **[number][3]** The current index of the Geometry being processed.
## coordEach
Iterate over coordinates in any GeoJSON object, similar to Array.forEach()
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (currentCoord, coordIndex, featureIndex, multiFeatureIndex)
- `excludeWrapCoord` **[boolean][7]** whether or not to include the final coordinate of LinearRings that wraps the ring in its iteration. (optional, default `false`)
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {"foo": "bar"}),
turf.point([36, 53], {"hello": "world"})
]);
turf.coordEach(features, function (currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
//=currentCoord
//=coordIndex
//=featureIndex
//=multiFeatureIndex
//=geometryIndex
});
```
Returns **void**
## coordReduce
Reduce coordinates in any GeoJSON object, similar to Array.reduce()
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Geometry][6] \| [Feature][5])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (previousValue, currentCoord, coordIndex)
- `initialValue` **any?** Value to use as the first argument to the first call of the callback.
- `excludeWrapCoord` **[boolean][7]** whether or not to include the final coordinate of LinearRings that wraps the ring in its iteration. (optional, default `false`)
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {"foo": "bar"}),
turf.point([36, 53], {"hello": "world"})
]);
turf.coordReduce(features, function (previousValue, currentCoord, coordIndex, featureIndex, multiFeatureIndex, geometryIndex) {
//=previousValue
//=currentCoord
//=coordIndex
//=featureIndex
//=multiFeatureIndex
//=geometryIndex
return currentCoord;
});
```
Returns **any** The value that results from the reduction.
## coordReduceCallback
Callback for coordReduce
The first time the callback function is called, the values provided as arguments depend
on whether the reduce method has an initialValue argument.
If an initialValue is provided to the reduce method:
- The previousValue argument is initialValue.
- The currentValue argument is the value of the first element present in the array.
If an initialValue is not provided:
- The previousValue argument is the value of the first element present in the array.
- The currentValue argument is the value of the second element present in the array.
Type: [Function][1]
**Parameters**
- `previousValue` **any** The accumulated value previously returned in the last invocation
of the callback, or initialValue, if supplied.
- `currentCoord` **[Array][2]&lt;[number][3]>** The current coordinate being processed.
- `coordIndex` **[number][3]** The current index of the coordinate being processed.
Starts at index 0, if an initialValue is provided, and at index 1 otherwise.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed.
- `geometryIndex` **[number][3]** The current index of the Geometry being processed.
## propEach
Iterate over properties in any GeoJSON object, similar to Array.forEach()
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (currentProperties, featureIndex)
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.point([36, 53], {hello: 'world'})
]);
turf.propEach(features, function (currentProperties, featureIndex) {
//=currentProperties
//=featureIndex
});
```
Returns **void**
## propEachCallback
Callback for propEach
Type: [Function][1]
**Parameters**
- `currentProperties` **[Object][8]** The current Properties being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
## propReduceCallback
Callback for propReduce
The first time the callback function is called, the values provided as arguments depend
on whether the reduce method has an initialValue argument.
If an initialValue is provided to the reduce method:
- The previousValue argument is initialValue.
- The currentValue argument is the value of the first element present in the array.
If an initialValue is not provided:
- The previousValue argument is the value of the first element present in the array.
- The currentValue argument is the value of the second element present in the array.
Type: [Function][1]
**Parameters**
- `previousValue` **any** The accumulated value previously returned in the last invocation
of the callback, or initialValue, if supplied.
- `currentProperties` **any** The current Properties being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
## propReduce
Reduce properties in any GeoJSON object into a single value,
similar to how Array.reduce works. However, in this case we lazily run
the reduction, so an array of all properties is unnecessary.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (previousValue, currentProperties, featureIndex)
- `initialValue` **any?** Value to use as the first argument to the first call of the callback.
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.point([36, 53], {hello: 'world'})
]);
turf.propReduce(features, function (previousValue, currentProperties, featureIndex) {
//=previousValue
//=currentProperties
//=featureIndex
return currentProperties
});
```
Returns **any** The value that results from the reduction.
## featureEachCallback
Callback for featureEach
Type: [Function][1]
**Parameters**
- `currentFeature` **[Feature][5]&lt;any>** The current Feature being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
## featureEach
Iterate over features in any GeoJSON object, similar to
Array.forEach.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (currentFeature, featureIndex)
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.point([36, 53], {hello: 'world'})
]);
turf.featureEach(features, function (currentFeature, featureIndex) {
//=currentFeature
//=featureIndex
});
```
Returns **void**
## featureReduceCallback
Callback for featureReduce
The first time the callback function is called, the values provided as arguments depend
on whether the reduce method has an initialValue argument.
If an initialValue is provided to the reduce method:
- The previousValue argument is initialValue.
- The currentValue argument is the value of the first element present in the array.
If an initialValue is not provided:
- The previousValue argument is the value of the first element present in the array.
- The currentValue argument is the value of the second element present in the array.
Type: [Function][1]
**Parameters**
- `previousValue` **any** The accumulated value previously returned in the last invocation
of the callback, or initialValue, if supplied.
- `currentFeature` **[Feature][5]** The current Feature being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
## featureReduce
Reduce features in any GeoJSON object, similar to Array.reduce().
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (previousValue, currentFeature, featureIndex)
- `initialValue` **any?** Value to use as the first argument to the first call of the callback.
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {"foo": "bar"}),
turf.point([36, 53], {"hello": "world"})
]);
turf.featureReduce(features, function (previousValue, currentFeature, featureIndex) {
//=previousValue
//=currentFeature
//=featureIndex
return currentFeature
});
```
Returns **any** The value that results from the reduction.
## coordAll
Get all coordinates from any GeoJSON object.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.point([36, 53], {hello: 'world'})
]);
var coords = turf.coordAll(features);
//= [[26, 37], [36, 53]]
```
Returns **[Array][2]&lt;[Array][2]&lt;[number][3]>>** coordinate position array
## geomEachCallback
Callback for geomEach
Type: [Function][1]
**Parameters**
- `currentGeometry` **[Geometry][6]** The current Geometry being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `featureProperties` **[Object][8]** The current Feature Properties being processed.
- `featureBBox` **[Array][2]&lt;[number][3]>** The current Feature BBox being processed.
- `featureId` **([number][3] \| [string][9])** The current Feature Id being processed.
## geomEach
Iterate over each geometry in any GeoJSON object, similar to Array.forEach()
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.point([36, 53], {hello: 'world'})
]);
turf.geomEach(features, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
//=currentGeometry
//=featureIndex
//=featureProperties
//=featureBBox
//=featureId
});
```
Returns **void**
## geomReduceCallback
Callback for geomReduce
The first time the callback function is called, the values provided as arguments depend
on whether the reduce method has an initialValue argument.
If an initialValue is provided to the reduce method:
- The previousValue argument is initialValue.
- The currentValue argument is the value of the first element present in the array.
If an initialValue is not provided:
- The previousValue argument is the value of the first element present in the array.
- The currentValue argument is the value of the second element present in the array.
Type: [Function][1]
**Parameters**
- `previousValue` **any** The accumulated value previously returned in the last invocation
of the callback, or initialValue, if supplied.
- `currentGeometry` **[Geometry][6]** The current Geometry being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `featureProperties` **[Object][8]** The current Feature Properties being processed.
- `featureBBox` **[Array][2]&lt;[number][3]>** The current Feature BBox being processed.
- `featureId` **([number][3] \| [string][9])** The current Feature Id being processed.
## geomReduce
Reduce geometry in any GeoJSON object, similar to Array.reduce().
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
- `initialValue` **any?** Value to use as the first argument to the first call of the callback.
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.point([36, 53], {hello: 'world'})
]);
turf.geomReduce(features, function (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
//=previousValue
//=currentGeometry
//=featureIndex
//=featureProperties
//=featureBBox
//=featureId
return currentGeometry
});
```
Returns **any** The value that results from the reduction.
## flattenEachCallback
Callback for flattenEach
Type: [Function][1]
**Parameters**
- `currentFeature` **[Feature][5]** The current flattened feature being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed.
## flattenEach
Iterate over flattened features in any GeoJSON object, similar to
Array.forEach.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (currentFeature, featureIndex, multiFeatureIndex)
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})
]);
turf.flattenEach(features, function (currentFeature, featureIndex, multiFeatureIndex) {
//=currentFeature
//=featureIndex
//=multiFeatureIndex
});
```
## flattenReduceCallback
Callback for flattenReduce
The first time the callback function is called, the values provided as arguments depend
on whether the reduce method has an initialValue argument.
If an initialValue is provided to the reduce method:
- The previousValue argument is initialValue.
- The currentValue argument is the value of the first element present in the array.
If an initialValue is not provided:
- The previousValue argument is the value of the first element present in the array.
- The currentValue argument is the value of the second element present in the array.
Type: [Function][1]
**Parameters**
- `previousValue` **any** The accumulated value previously returned in the last invocation
of the callback, or initialValue, if supplied.
- `currentFeature` **[Feature][5]** The current Feature being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed.
## flattenReduce
Reduce flattened features in any GeoJSON object, similar to Array.reduce().
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON object
- `callback` **[Function][1]** a method that takes (previousValue, currentFeature, featureIndex, multiFeatureIndex)
- `initialValue` **any?** Value to use as the first argument to the first call of the callback.
**Examples**
```javascript
var features = turf.featureCollection([
turf.point([26, 37], {foo: 'bar'}),
turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})
]);
turf.flattenReduce(features, function (previousValue, currentFeature, featureIndex, multiFeatureIndex) {
//=previousValue
//=currentFeature
//=featureIndex
//=multiFeatureIndex
return currentFeature
});
```
Returns **any** The value that results from the reduction.
## segmentEachCallback
Callback for segmentEach
Type: [Function][1]
**Parameters**
- `currentSegment` **[Feature][5]&lt;[LineString][10]>** The current Segment being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed.
- `geometryIndex` **[number][3]** The current index of the Geometry being processed.
- `segmentIndex` **[number][3]** The current index of the Segment being processed.
Returns **void**
## segmentEach
Iterate over 2-vertex line segment in any GeoJSON object, similar to Array.forEach()
(Multi)Point geometries do not contain segments therefore they are ignored during this operation.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON
- `callback` **[Function][1]** a method that takes (currentSegment, featureIndex, multiFeatureIndex, geometryIndex, segmentIndex)
**Examples**
```javascript
var polygon = turf.polygon([[[-50, 5], [-40, -10], [-50, -10], [-40, 5], [-50, 5]]]);
// Iterate over GeoJSON by 2-vertex segments
turf.segmentEach(polygon, function (currentSegment, featureIndex, multiFeatureIndex, geometryIndex, segmentIndex) {
//=currentSegment
//=featureIndex
//=multiFeatureIndex
//=geometryIndex
//=segmentIndex
});
// Calculate the total number of segments
var total = 0;
turf.segmentEach(polygon, function () {
total++;
});
```
Returns **void**
## segmentReduceCallback
Callback for segmentReduce
The first time the callback function is called, the values provided as arguments depend
on whether the reduce method has an initialValue argument.
If an initialValue is provided to the reduce method:
- The previousValue argument is initialValue.
- The currentValue argument is the value of the first element present in the array.
If an initialValue is not provided:
- The previousValue argument is the value of the first element present in the array.
- The currentValue argument is the value of the second element present in the array.
Type: [Function][1]
**Parameters**
- `previousValue` **any** The accumulated value previously returned in the last invocation
of the callback, or initialValue, if supplied.
- `currentSegment` **[Feature][5]&lt;[LineString][10]>** The current Segment being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed.
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed.
- `geometryIndex` **[number][3]** The current index of the Geometry being processed.
- `segmentIndex` **[number][3]** The current index of the Segment being processed.
## segmentReduce
Reduce 2-vertex line segment in any GeoJSON object, similar to Array.reduce()
(Multi)Point geometries do not contain segments therefore they are ignored during this operation.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** any GeoJSON
- `callback` **[Function][1]** a method that takes (previousValue, currentSegment, currentIndex)
- `initialValue` **any?** Value to use as the first argument to the first call of the callback.
**Examples**
```javascript
var polygon = turf.polygon([[[-50, 5], [-40, -10], [-50, -10], [-40, 5], [-50, 5]]]);
// Iterate over GeoJSON by 2-vertex segments
turf.segmentReduce(polygon, function (previousSegment, currentSegment, featureIndex, multiFeatureIndex, geometryIndex, segmentIndex) {
//= previousSegment
//= currentSegment
//= featureIndex
//= multiFeatureIndex
//= geometryIndex
//= segmentInex
return currentSegment
});
// Calculate the total number of segments
var initialValue = 0
var total = turf.segmentReduce(polygon, function (previousValue) {
previousValue++;
return previousValue;
}, initialValue);
```
Returns **void**
## lineEachCallback
Callback for lineEach
Type: [Function][1]
**Parameters**
- `currentLine` **[Feature][5]&lt;[LineString][10]>** The current LineString|LinearRing being processed
- `featureIndex` **[number][3]** The current index of the Feature being processed
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed
- `geometryIndex` **[number][3]** The current index of the Geometry being processed
## lineEach
Iterate over line or ring coordinates in LineString, Polygon, MultiLineString, MultiPolygon Features or Geometries,
similar to Array.forEach.
**Parameters**
- `geojson` **([Geometry][6] \| [Feature][5]&lt;([LineString][10] \| [Polygon][11] \| [MultiLineString][12] \| [MultiPolygon][13])>)** object
- `callback` **[Function][1]** a method that takes (currentLine, featureIndex, multiFeatureIndex, geometryIndex)
**Examples**
```javascript
var multiLine = turf.multiLineString([
[[26, 37], [35, 45]],
[[36, 53], [38, 50], [41, 55]]
]);
turf.lineEach(multiLine, function (currentLine, featureIndex, multiFeatureIndex, geometryIndex) {
//=currentLine
//=featureIndex
//=multiFeatureIndex
//=geometryIndex
});
```
## lineReduceCallback
Callback for lineReduce
The first time the callback function is called, the values provided as arguments depend
on whether the reduce method has an initialValue argument.
If an initialValue is provided to the reduce method:
- The previousValue argument is initialValue.
- The currentValue argument is the value of the first element present in the array.
If an initialValue is not provided:
- The previousValue argument is the value of the first element present in the array.
- The currentValue argument is the value of the second element present in the array.
Type: [Function][1]
**Parameters**
- `previousValue` **any** The accumulated value previously returned in the last invocation
of the callback, or initialValue, if supplied.
- `currentLine` **[Feature][5]&lt;[LineString][10]>** The current LineString|LinearRing being processed.
- `featureIndex` **[number][3]** The current index of the Feature being processed
- `multiFeatureIndex` **[number][3]** The current index of the Multi-Feature being processed
- `geometryIndex` **[number][3]** The current index of the Geometry being processed
## lineReduce
Reduce features in any GeoJSON object, similar to Array.reduce().
**Parameters**
- `geojson` **([Geometry][6] \| [Feature][5]&lt;([LineString][10] \| [Polygon][11] \| [MultiLineString][12] \| [MultiPolygon][13])>)** object
- `callback` **[Function][1]** a method that takes (previousValue, currentLine, featureIndex, multiFeatureIndex, geometryIndex)
- `initialValue` **any?** Value to use as the first argument to the first call of the callback.
**Examples**
```javascript
var multiPoly = turf.multiPolygon([
turf.polygon([[[12,48],[2,41],[24,38],[12,48]], [[9,44],[13,41],[13,45],[9,44]]]),
turf.polygon([[[5, 5], [0, 0], [2, 2], [4, 4], [5, 5]]])
]);
turf.lineReduce(multiPoly, function (previousValue, currentLine, featureIndex, multiFeatureIndex, geometryIndex) {
//=previousValue
//=currentLine
//=featureIndex
//=multiFeatureIndex
//=geometryIndex
return currentLine
});
```
Returns **any** The value that results from the reduction.
## findSegment
Finds a particular 2-vertex LineString Segment from a GeoJSON using `@turf/meta` indexes.
Negative indexes are permitted.
Point & MultiPoint will always return null.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** Any GeoJSON Feature or Geometry
- `options` **[Object][8]** Optional parameters (optional, default `{}`)
- `options.featureIndex` **[number][3]** Feature Index (optional, default `0`)
- `options.multiFeatureIndex` **[number][3]** Multi-Feature Index (optional, default `0`)
- `options.geometryIndex` **[number][3]** Geometry Index (optional, default `0`)
- `options.segmentIndex` **[number][3]** Segment Index (optional, default `0`)
- `options.properties` **[Object][8]** Translate Properties to output LineString (optional, default `{}`)
- `options.bbox` **[BBox][14]** Translate BBox to output LineString (optional, default `{}`)
- `options.id` **([number][3] \| [string][9])** Translate Id to output LineString (optional, default `{}`)
**Examples**
```javascript
var multiLine = turf.multiLineString([
[[10, 10], [50, 30], [30, 40]],
[[-10, -10], [-50, -30], [-30, -40]]
]);
// First Segment (defaults are 0)
turf.findSegment(multiLine);
// => Feature<LineString<[[10, 10], [50, 30]]>>
// First Segment of 2nd Multi Feature
turf.findSegment(multiLine, {multiFeatureIndex: 1});
// => Feature<LineString<[[-10, -10], [-50, -30]]>>
// Last Segment of Last Multi Feature
turf.findSegment(multiLine, {multiFeatureIndex: -1, segmentIndex: -1});
// => Feature<LineString<[[-50, -30], [-30, -40]]>>
```
Returns **[Feature][5]&lt;[LineString][10]>** 2-vertex GeoJSON Feature LineString
## findPoint
Finds a particular Point from a GeoJSON using `@turf/meta` indexes.
Negative indexes are permitted.
**Parameters**
- `geojson` **([FeatureCollection][4] \| [Feature][5] \| [Geometry][6])** Any GeoJSON Feature or Geometry
- `options` **[Object][8]** Optional parameters (optional, default `{}`)
- `options.featureIndex` **[number][3]** Feature Index (optional, default `0`)
- `options.multiFeatureIndex` **[number][3]** Multi-Feature Index (optional, default `0`)
- `options.geometryIndex` **[number][3]** Geometry Index (optional, default `0`)
- `options.coordIndex` **[number][3]** Coord Index (optional, default `0`)
- `options.properties` **[Object][8]** Translate Properties to output Point (optional, default `{}`)
- `options.bbox` **[BBox][14]** Translate BBox to output Point (optional, default `{}`)
- `options.id` **([number][3] \| [string][9])** Translate Id to output Point (optional, default `{}`)
**Examples**
```javascript
var multiLine = turf.multiLineString([
[[10, 10], [50, 30], [30, 40]],
[[-10, -10], [-50, -30], [-30, -40]]
]);
// First Segment (defaults are 0)
turf.findPoint(multiLine);
// => Feature<Point<[10, 10]>>
// First Segment of the 2nd Multi-Feature
turf.findPoint(multiLine, {multiFeatureIndex: 1});
// => Feature<Point<[-10, -10]>>
// Last Segment of last Multi-Feature
turf.findPoint(multiLine, {multiFeatureIndex: -1, coordIndex: -1});
// => Feature<Point<[-30, -40]>>
```
Returns **[Feature][5]&lt;[Point][15]>** 2-vertex GeoJSON Feature Point
[1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Statements/function
[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
[4]: https://tools.ietf.org/html/rfc7946#section-3.3
[5]: https://tools.ietf.org/html/rfc7946#section-3.2
[6]: https://tools.ietf.org/html/rfc7946#section-3.1
[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
[8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
[9]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
[10]: https://tools.ietf.org/html/rfc7946#section-3.1.4
[11]: https://tools.ietf.org/html/rfc7946#section-3.1.6
[12]: https://tools.ietf.org/html/rfc7946#section-3.1.5
[13]: https://tools.ietf.org/html/rfc7946#section-3.1.7
[14]: https://tools.ietf.org/html/rfc7946#section-5
[15]: https://tools.ietf.org/html/rfc7946#section-3.1.2
<!-- This file is automatically generated. Please don't edit it directly:
if you find an error, edit the source file (likely index.js), and re-run
./scripts/generate-readmes in the turf project. -->
---
This module is part of the [Turfjs project](http://turfjs.org/), an open source
module collection dedicated to geographic algorithms. It is maintained in the
[Turfjs/turf](https://github.com/Turfjs/turf) repository, where you can create
PRs and issues.
### Installation
Install this module individually:
```sh
$ npm install @turf/meta
```
Or install the Turf module that includes it as a function:
```sh
$ npm install @turf/turf
```