Parameter

Type

Description

url

String

GeoJSON url

options

Object

(optional) layer options

set object

Properties

Type

Description

extent

sg.geometry.Extent

layer extent

layers

Array.<sg.layers.Layer>

sub-layer array

lineLayer

sg.layers.GraphicsLayer

Line layer

loadError

Error

contains value if layer loading failed

map

MapBase

The target MapBase into which layer(s) will be added

maxScale

Number

maximum visible scale

minScale

Number

minimum visible scale

name

Error

layer name

node

DOMNODE

layer html node

opacity

Number

transparency whose range is from 0 to 1

pointLayer

sg.layers.GraphicsLayer

Point layer

polygonLayer

sg.layers.GraphicsLayer

Polygon layer

title

String

layer title

visible

Boolean

whether the layer is visible

True: 可見
False: 不可見

Methods

Type

Description

addLayer(lyr)

Array.<sg.layers.Layer>        

add sub-layer

lyr: the target sub-layer which will be added

getLayers()

Returns:

MapBase

return sub-layer array

getMap()

Returns:

String

return target MapBase

Returns:

getName()

Returns:

DOMNODE

return layer name

Returns:

getNode()

Returns:

String

return layer html node

Returns:

getTitle()

Returns:

Boolean

return layer title

Returns:

getVisible()

return layer visibility

Returns:

hide()

hide layer

Initialize()

String

called when layer being added to the MapBase

putName(newVal)

String

set layer name

putTitle(newVal)

String

set layer title

putVisible(newVal)

Boolean

set layer visibility

RebuildElement()

sg.layers.layer

redraw layer

removeLayer(lyr)

remove sub-layer

lyr: the target sub-layer which will be removed

RemoveSelf()

sg.InfoTemplate        

remove layer

setMaxScale(maxScale)

Number

set the maximum visible scale of the layer

setMinScale(minScale)

Number

set the minimum visible scale of the layer

setOpacity(opacity)

Number

set layer transparency

opacity: layer transparency

show()

show layer

UpdateElement()

update layer

Event

Description

load

triggered when layer loaded