Class: Util

Methods

ol.supermap.Util.createCanvasContext2D(opt_width, opt_height)

Util.js, line 237

Create a CanvasContext2D.

Name	Type	Description
opt_width	number	Width of the canvas.
opt_height	number	Height of the canvas.

ol.supermap.Util.Csv2GeoJSON(csv, options)

Util.js, line 152

Transform csv to GeoJSON.

Name	Type	Description
csv	Object	The object of csv.
options	Object	The parameters of the transform.

ol.supermap.Util.isArray(obj){boolean}

Util.js, line 142

Determine whether it is an array.

Name	Type	Description
obj	Object	The object to be determined.

Returns:

Type	Description
boolean	Whether it is an array.

ol.supermap.Util.resolutionToScale(resolution, dpi, mapUnit){number}

Util.js, line 42

Compute scale by the resolution.

Name	Type	Description
resolution	number	The resolution.
dpi	number	The resolution of screen.
mapUnit	string	The unit of the map.

Returns:

Type	Description
number	The scale.

ol.supermap.Util.scaleToResolution(scale, dpi, mapUnit){number}

Util.js, line 99

Compute resolution by the scale.

Name	Type	Description
scale	number	The scale.
dpi	number	The resolution of screen.
mapUnit	string	The unit of the map.

Returns:

Type	Description
number	The resolution.

ol.supermap.Util.supportWebGL2()

Util.js, line 253

Whether to support webgl2.

ol.supermap.Util.toGeoJSON(smObj)

Util.js, line 17

Transform the passed object to GeoJSON.

Name	Type	Description
smObj	Object	The object to be passed.

ol.supermap.Util.toProcessingParam(points)

Util.js, line 74

Transform the array of nodes about the region to the processing analysis service parameters.

Name	Type	Description
points	Array	The array of nodes about region.

Returns:

The processing service cut、the query analysis and the parameters of the analysis.

ol.supermap.Util.toSuperMapBounds(bounds){SuperMap.Bounds}

Util.js, line 59

Turn into SuperMapBounds.

Name	Type	Description
bounds	Array.<number>	An array of bounds.

Returns:

Type	Description
SuperMap.Bounds	Return SuperMapBounds.

ol.supermap.Util.toSuperMapGeometry(geoJSON)

Util.js, line 29

Transform the geoJSON to SuperMap geomotry.

Name	Type	Description
geoJSON	GeoJSONObject	The object of geoJSON.