Class: LambertGrid

Defined in: Grid.ts:497

A Lambert conformal conic grid with uniform grid spacing

Extends

• StructuredGrid

Constructors

Constructor

new LambertGrid(ni, nj, lon_0, lat_0, lat_std, ll_x, ll_y, ur_x, ur_y, a?, b?, thin_x?, thin_y?): LambertGrid

Defined in: Grid.ts:526

Create a Lambert conformal conic grid from the lower-left and upper-right corner x/y values.

Parameters

Parameter	Type	Description
ni	number	The number of grid points in the i (longitude) direction
nj	number	The number of grid points in the j (latitude) direction
lon_0	number	The standard longitude for the projection; this is also the center longitude for the projection
lat_0	number	The center latitude for the projection
lat_std	[number, number]	The standard latitudes for the projection
ll_x	number	The x coordinate in projection space of the lower-left corner of the grid
ll_y	number	The y coordinate in projection space of the lower-left corner of the grid
ur_x	number	The x coordinate in projection space of the upper-right corner of the grid
ur_y	number	The y coordinate in projection space of the upper-right corner of the grid
a?	number	The semimajor axis of the assumed shape of Earth in meters
b?	number	The semiminor axis of the assumed shape of Earth in meters
thin_x?	number	-
thin_y?	number	-

Returns

LambertGrid

Overrides

StructuredGrid.constructor

Properties

Property	Modifier	Type	Inherited from	Defined in
a	readonly	number	-	Grid.ts:505
b	readonly	number	-	Grid.ts:506
is_conformal	readonly	boolean	StructuredGrid.is_conformal	Grid.ts:104
lat_0	readonly	number	-	Grid.ts:499
lat_std	readonly	[number, number]	-	Grid.ts:500
ll_x	readonly	number	-	Grid.ts:501
ll_y	readonly	number	-	Grid.ts:502
lon_0	readonly	number	-	Grid.ts:498
ni	readonly	number	StructuredGrid.ni	Grid.ts:102
nj	readonly	number	StructuredGrid.nj	Grid.ts:103
thin_x	readonly	number	StructuredGrid.thin_x	Grid.ts:152
thin_y	readonly	number	StructuredGrid.thin_y	Grid.ts:153
type	readonly	GridType	StructuredGrid.type	Grid.ts:101
ur_x	readonly	number	-	Grid.ts:503
ur_y	readonly	number	-	Grid.ts:504

Methods

getVectorRotationAtPoint()

getVectorRotationAtPoint(lon, lat): number

Defined in: Grid.ts:138

Parameters

Parameter	Type
lon	number
lat	number

Returns

number

Inherited from

StructuredGrid.getVectorRotationAtPoint

---

getVectorRotationTexture()

getVectorRotationTexture(gl, data_are_earth_relative): object

Defined in: Grid.ts:144

Parameters

Parameter	Type
gl	WebGLAnyRenderingContext
data_are_earth_relative	boolean

Returns

object

rotation

rotation: WGLTexture

Inherited from

StructuredGrid.getVectorRotationTexture

---

getWGLBillboardBuffers()

getWGLBillboardBuffers(gl, thin_fac, max_zoom): Promise<{ texcoords: WGLBuffer; vertices: WGLBuffer; }>

Defined in: Grid.ts:132

Parameters

Parameter	Type
gl	WebGLAnyRenderingContext
thin_fac	number
max_zoom	number

Returns

Promise<{ texcoords: WGLBuffer; vertices: WGLBuffer; }>

Inherited from

StructuredGrid.getWGLBillboardBuffers

---

getWGLBuffers()

getWGLBuffers(gl): Promise<{ texcoords: WGLBuffer; vertices: WGLBuffer; }>

Defined in: Grid.ts:212

Parameters

Parameter	Type
gl	WebGLAnyRenderingContext

Returns

Promise<{ texcoords: WGLBuffer; vertices: WGLBuffer; }>

Inherited from

StructuredGrid.getWGLBuffers

---

sampleNearestGridPoint()

sampleNearestGridPoint(lon, lat, ary): object

Defined in: Grid.ts:216

Parameters

Parameter	Type
lon	number
lat	number
ary	TypedArray

Returns

object

sample

sample: number

sample_lat

sample_lat: number

sample_lon

sample_lon: number

Inherited from

StructuredGrid.sampleNearestGridPoint

---

fromLLCornerLonLat()

static fromLLCornerLonLat(ni, nj, lon_0, lat_0, lat_std, ll_lon, ll_lat, dx, dy, a?, b?): LambertGrid

Defined in: Grid.ts:597

Create a Lambert conformal conic grid from the lower-left grid point coordinate and a dx and dy.

Parameters

Parameter	Type	Description
ni	number	The number of grid points in the i (longitude) direction
nj	number	The number of grid points in the j (latitude) direction
lon_0	number	The standard longitude for the projection; this is also the center longitude for the projection
lat_0	number	The center latitude for the projection
lat_std	[number, number]	The standard latitudes for the projection
ll_lon	number	The longitude of the lower-left corner of the grid
ll_lat	number	The latitude of the lower-left corner of the grid
dx	number	The grid dx in meters
dy	number	The grid dy in meters
a?	number	The semimajor axis of the assumed shape of Earth in meters
b?	number	The semiminor axis of the assumed shape of Earth in meters

Returns

LambertGrid