Class: CRS

CRS

Proj coordinate system definition class. For computing level, options.scales options.scaleDenominators options.resolutions options.bounds One must be specified and the order is prioritized. When options.bounds is specified,the Level 0 is a 256 tile containing the entire bounds,which is Math.max(bounds.getSize().x, bounds.getSize().y)/256 。 To ensure that the tile rank is correct,options.origin options.bounds must be specified one. When options.bounds is specified,the tile origin is the upper left corner of bounds.

L.Proj.CRS(srsCode, options)

D:/iClient9_English0919/src/leaflet/core/Proj4Leaflet.js, line 85
Name Type Description
srsCode string

proj srsCode。
options Object

options.

Name Type Default Description
def string

The Proj4 definition of projection. detailed
origin Array.<number> | L.Point optional

The origin.
scales Array.<number> optional

The scale array.
scaleDenominators Array.<number> optional

The scale denominator array.
resolutions Array.<number> optional

The resolutions array.
bounds Array.<number> | L.Bounds optional

The bounds.
dpi number 96 optional

dpi。
Example
var crs =L.Proj.CRS("EPSG:4326",{
    origin: [-180,90],
    scaleDenominators: [2000,1000,500,200,100,50,20,10],
});
var map=L.map('map', {
    crs: crs
    ...
})

Extends

Methods

scale(zoom)

D:/iClient9_English0919/src/leaflet/core/Proj4Leaflet.js, line 192

Get the scale value according to the zoom level.

Name Type Description
zoom number

The zoom level.
Returns:
The scale.

zoom(scale){number}

D:/iClient9_English0919/src/leaflet/core/Proj4Leaflet.js, line 216

Get the zoom level according to the scale value.

Name Type Description
scale number

The scale value.
Returns:
Type Description
number The zoom level.