The migration map can show the migration path of the features according to the start and end information of the features. The MigrationLayer object defines the attributes of the migration map.
| Attribute | Type | Description |
|
layerType |
string |
[Required] The layer type. Fixed constant: "MIGRATION". |
|
name |
string |
[Required] The layer name. |
|
visible |
boolean |
[Required] The visibility of the layer. |
|
featureType |
string |
[Required] The feature type of the layer. The feature type of the migration map is "POINT" or "POLYGON". |
|
projection |
string |
[Required] The projected coordinate system of the map. Optional value: EPSG or WKT universal coordinate system description standard. |
|
dataSource |
DataSource |
[Required] The data source of the migration map is one of the following four data sources: |
| from | Position |
[Required] The starting point of migration. |
| to | Position |
[Required] The end point of migration. |
|
lineSetting |
[Required] Migrating line settings. |
|
| animationSetting | AnimationSetting |
[Required] Animation special effects settings. |
|
labelSetting |
LabelSetting |
[Required] Label settings of the migration map. |
|
legendSetting |
LegendSetting |
[Optional] Legend settings of the migration map. |
|
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. |
|
|
autoUpdateTime |
number |
[Optional] The time for the layer data to be automatically refreshed, in milliseconds. |
|
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"}. |
Create a MigrationLayer that conforms to the WebMap specification.
{
"layers": [
{
"layerType": "MIGRATION",
"name": "China Earthquake Intensity Regionalization",
"visible": true,
"featureType": "POLYGON",
"projection": "EPSG:4326",
"enableFields": [
"Intensity value",
"dataviz_featureID"
],
"from": {
"type": "XY_FIELD",
"xField": "dataviz_featureID",
"yField": "dataviz_featureID"
},
"to": {
"type": "XY_FIELD",
"xField": "dataviz_featureID",
"yField": "dataviz_featureID"
},
"lineSetting": {
"color": "#62AD16",
"type": "solid",
"width": 1,
"opacity": 0.6,
"curveness": 0.2
},
"animationSetting": {
"show": false,
"constantSpeed": 40,
"symbol": "pin",
"symbolSize": 15
},
"labelSetting": {
"show": false,
"color": "#62AD16",
"fontFamily": "Microsoft Yahei"
},
"dataSource": {
"type": "PORTAL_DATA",
"serverId": "645697778",
"accessType": "DIRECT"
}
}
],
}