Namespace: coordinate

Methods

---

<static> convexHull(points)

Compute a convex hull using Andrew's Monotone Chain Algorithm

Parameters:

Name	Type	Description
points	Array.<ol.geom.Point>	an array of 2D points

Returns:

the convex hull vertices

Type

Array.<ol.geom.Point>

---

<static> dist2d(p1, p2)

Distance beetween 2 points Usefull geometric functions

Parameters:

Name	Type	Description
p1	ol.coordinate	first point
p2	ol.coordinate	second point

Returns:

distance

Type

number

---

<static> equal(p1, p2)

2 points are equal Usefull geometric functions

Parameters:

Name	Type	Description
p1	ol.coordinate	first point
p2	ol.coordinate	second point

Returns:

Type

boolean

---

<static> findSegment(pt, coords)

Find the segment a point belongs to

Parameters:

Name	Type	Description
pt	ol.coordinate
coords	Array.<ol.coordinate>

Returns:

the index (-1 if not found) and the segment

---

<static> fromDFCI(index, projection)

Get coordinate from French DFCI index

Parameters:

Name	Type	Description
index	String	the DFCI index
projection	ol/proj/Projection	result projection, default EPSG:27572

Returns:

coord

Type

ol/coordinate

---

<static> getFeatureCenter(f)

Get center coordinate of a feature

Parameters:

Name	Type	Description
f	ol.Feature

Returns:

the center

Type

ol.coordinate

---

<static> getGeomCenter(geom)

Get center coordinate of a geometry

Parameters:

Name	Type	Description
geom	ol.Feature

Returns:

the center

Type

ol.coordinate

---

<static> offsetCoords(coords, offset)

Offset a polyline

Parameters:

Name	Type	Description
coords	Array.<ol.coordinate>
offset	Number

See:

• http://stackoverflow.com/a/11970006/796832
• https://drive.google.com/viewerng/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxqa2dhZGdldHN0b3JlfGd4OjQ4MzI5M2Y0MjNmNzI2MjY

Returns:

resulting coord

Type

Array.<ol.coordinates>

---

<static> splitH(geom, y, n)

Split a Polygon geom with horizontal lines

Parameters:

Name	Type	Description
geom	Array.<ol.coordinate>
y	Number	the y to split
n	Number	contour index

Returns:

Type

Array.<Array.<ol.coordinate>>

---

<static> toDFCI(coord, level, projection)

Convert coordinate to French DFCI grid

Parameters:

Name	Type	Description
coord	ol/coordinate
level	number	[0-3]
projection	ol/proj/Projection	of the coord, default EPSG:27572

Returns:

the DFCI index

Type

String

---

<static> validDFCI(index)

The string is a valid DFCI index

Parameters:

Name	Type	Description
index	string	DFCI index

Returns:

Type

boolean

---

<static> validDFCICoord(coord, projection)

Coordinate is valid for DFCI

Parameters:

Name	Type	Description
coord	ol/coordinate
projection	ol/proj/Projection	result projection, default EPSG:27572

Returns:

Type

boolean