The graduated symbol map uses the size of the symbol to express the value of the corresponding field or expression (thematic variable) of the element or record. The RankSymbolLayer object defines the attributes of the graduated symbol map.
| Attribute | Type | Description |
|
layerType |
string |
[Required] The layer type. Fixed constant: "RANK_SYMBOL". |
|
name |
string |
[Required] The layer name. |
|
visible |
boolean |
[Required] The visibility of the layer. |
|
opacity |
number |
[Optional] The opacity of the layer. The maximum value is 1 and the minimum value is 0. |
|
visibleScale |
[Optional] Stores the visible scale range of the current layer. |
|
|
dataSource |
DataSource |
[Required] The datasource of the RankSymbolLayer is one of the following five datasources: |
|
projection |
string |
[Required] The projected coordinate system of the map. Optional value: EPSG or WKT universal coordinate system description standard. |
|
featureType |
string |
[Required] The feature type. Optional constants: "POINT". |
|
xyField |
object<srting> |
[Required] It consists of two sub-attributes "xField" and "yField", which respectively define the name of the field to which the X and Y coordinates of the point feature belong. |
|
style |
[Required] Label style. |
|
|
themeSetting |
[Required] Theme settings. |
|
|
labelStyle |
LabelStyle |
[Optional] Label style. |
|
legendSetting |
LegendSetting |
[Optional] Legend settings. |
|
searchSetting |
[Optional] Search settings. |
|
|
enableFields |
array<string> |
[Required] The fields displayed in attribute table |
|
captions |
object |
[Optional] The key is the field name, and the value is the user-defined string type field display name, for example: {"ADDRESS":"ADDRESS display name"}. |
|
popupInfo |
[Optional] Settings for the attribute pop-up window. |
|
|
autoUpdateTime |
number |
[Optional] The time for the layer data to be automatically refreshed, in milliseconds. |
Construct a RankSymbolLayer that conforms to the WebMap specification.
{
"layers": [
{
"layerType": "RANK_SYMBOL",
"name": "National provincial capitals",
"visible": true,
"featureType": "POINT",
"xyField": {
"xField": "X",
"yField": "Y"
},
"projection": "EPSG:4326",
"enableFields": [
"X",
"Y",
"Province",
"Capitals"
],
"style": {
"radius": 6,
"strokeWidth": 1,
"strokeColor": "#ffffff",
"strokeOpacity": 1,
"fillOpacity": 0.9,
"fillColor": "#24B391",
"type": "BASIC_POINT"
},
"themeSetting": {
"themeField": "X",
"segmentCount": 6,
"segmentMethod": "offset",
"minRadius": 6,
"maxRadius": 12,
"customSettings": {}
},
"dataSource": {
"type": "PORTAL_DATA",
"serverId": "977948035",
"accessType": "DIRECT"
}
}
],
}