Class: CRS

CRS

Represent CRS defined by GeoJSON

new CRS(type, properties) [source]

Parameter Type Description
type String type of the CRS
properties Object CRS's properties

Members

  • (static, constant) WGS84 :CRS 

    • Predefined CRS of well-known WGS84 (aka EPSG:4326)
    Type:

  • (static, constant) EPSG4326 :CRS 

    • Alias for CRS.WGS84
    Type:

  • (static, constant) EPSG3857 :CRS 

    • Projected Coordinate System used by google maps that has the following alias: 'EPSG:3785', 'GOOGLE', 'EPSG:900913'
    Type:

  • (static, constant) IDENTITY :CRS 

    • A CRS represents a simple Cartesian coordinate system. 
    
Maps x, y directly, is useful for maps of flat surfaces (e.g. indoor maps, game maps).
    Type:

  • (static, constant) CGCS2000 :CRS 

    • Official coordinate system in China (aka EPSG:4490), in most cases, it can be considered the same with WGS84.
    Type:

  • (static, constant) EPSG4490 :CRS 

    • Alias for CRS.CGCS2000
    Type:

  • (static, constant) BD09LL :CRS 

    • Projection used by Baidu Map, a popular web map service in China.
    Type:

  • (static, constant) GCJ02 :CRS 

    • A encrypted CRS usded in the most online map services in China..
    Type:

    Static Methods

  • (static) createProj4(proj) [source]

    • Create a proj4 style CRS used by maptalks 
    {
    "type"       : "proj4",
    "properties" : {
        "proj"   : "+proj=longlat +datum=WGS84 +no_defs"
    }
}
var crs_wgs84 = CRS.createProj4("+proj=longlat +datum=WGS84 +no_defs");
    Parameter Type Description
    proj String a proj4 projection string.
    Returns:
    CRS: