A
DataSource which processes both
GeoJSON and TopoJSON data.
simplestyle-spec properties will also be used if they
are present.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
name |
string | 可选 The name of this data source. If undefined, a name will be taken from the name of the GeoJSON file. |
使用示例:
const viewer = new Cesium.Viewer('cesiumContainer');
viewer.dataSources.add(Cesium.GeoJsonDataSource.load('../../SampleData/ne_10m_us_states.topojson', {
stroke: Cesium.Color.HOTPINK,
fill: Cesium.Color.PINK,
strokeWidth: 3,
markerSymbol: '?'
}));Demo:
成员(属性)
Gets or sets default of whether to clamp to the ground.
-
默认值:
false
Gets an object that maps the href property of a crs link to a callback function
which takes the crs properties object and returns a Promise that resolves
to a function that takes a GeoJSON coordinate and transforms it into a WGS84 Earth-fixed Cartesian.
Items in this object take precedence over those defined in
crsLinkHrefs, assuming
the link has a type specified.
Gets an object that maps the type property of a crs link to a callback function
which takes the crs properties object and returns a Promise that resolves
to a function that takes a GeoJSON coordinate and transforms it into a WGS84 Earth-fixed Cartesian.
Items in
crsLinkHrefs take precedence over this object.
Gets an object that maps the name of a crs to a callback function which takes a GeoJSON coordinate
and transforms it into a WGS84 Earth-fixed Cartesian. Older versions of GeoJSON which
supported the EPSG type can be added to this list as well, by specifying the complete EPSG name,
for example 'EPSG:4326'.
static Cesium.GeoJsonDataSource.fill : Color
Gets or sets default color for polygon interiors.
-
默认值:
Color.YELLOW
static Cesium.GeoJsonDataSource.markerColor : Color
Gets or sets the default color of the map pin created for each point.
-
默认值:
Color.ROYALBLUE
Gets or sets the default size of the map pin created for each point, in pixels.
-
默认值:
48
Gets or sets the default symbol of the map pin created for each point.
This can be any valid Maki identifier, any single character,
or blank if no symbol is to be used.
static Cesium.GeoJsonDataSource.stroke : Color
Gets or sets the default color of polylines and polygon outlines.
-
默认值:
Color.BLACK
Gets or sets the default width of polylines and polygon outlines.
-
默认值:
2.0
changedEvent : Event
Gets an event that will be raised when the underlying data changes.
This DataSource only defines static data, therefore this property is always undefined.
Gets or sets the clustering options for this data source. This object can be shared between multiple data sources.
Gets the credit that will be displayed for the data source
Gets the collection of
Entity instances.
errorEvent : Event
Gets an event that will be raised if an error is encountered during processing.
Gets a value indicating if the data source is currently loading data.
loadingEvent : Event
Gets an event that will be raised when the data source either starts or stops loading.
Gets or sets a human-readable name for this instance.
Gets whether or not this data source should be displayed.
方法
static Cesium.GeoJsonDataSource.load(data, options) → Promise.<GeoJsonDataSource>
Creates a Promise to a new instance loaded with the provided GeoJSON or TopoJSON data.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
data |
Resource | string | object | A url, GeoJSON object, or TopoJSON object to be loaded. |
options |
GeoJsonDataSource.LoadOptions | 可选 An object specifying configuration options |
返回值:
A promise that will resolve when the data is loaded.
load(data, options) → Promise.<GeoJsonDataSource>
Asynchronously loads the provided GeoJSON or TopoJSON data, replacing any existing data.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
data |
Resource | string | object | A url, GeoJSON object, or TopoJSON object to be loaded. |
options |
GeoJsonDataSource.LoadOptions | 可选 An object specifying configuration options |
返回值:
a promise that will resolve when the GeoJSON is loaded.
process(data, options) → Promise.<GeoJsonDataSource>
Asynchronously loads the provided GeoJSON or TopoJSON data, without replacing any existing data.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
data |
Resource | string | object | A url, GeoJSON object, or TopoJSON object to be loaded. |
options |
GeoJsonDataSource.LoadOptions | 可选 An object specifying configuration options |
返回值:
a promise that will resolve when the GeoJSON is loaded.
Updates the data source to the provided time. This function is optional and
is not required to be implemented. It is provided for data sources which
retrieve data based on the current animation time or scene state.
If implemented, update will be called by
DataSourceDisplay once a frame.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
time |
JulianDate | The simulation time. |
返回值:
True if this data source is ready to be displayed at the provided time, false otherwise.
定义的类型
This callback is displayed as part of the GeoJsonDataSource class.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
properties |
object | The properties of the feature. |
nameProperty |
string | The property key that Cesium estimates to have the name of the feature. |
Initialization options for the
load method.
属性:
| 属性名称 | 类型 | 可选 | 默认值 | 描述信息 |
|---|---|---|---|---|
sourceUri |
string |
<可选> |
Overrides the url to use for resolving relative links. | |
describe |
GeoJsonDataSource.describe |
<可选> |
GeoJsonDataSource.defaultDescribeProperty | A function which returns a Property object (or just a string). |
markerSize |
number |
<可选> |
GeoJsonDataSource.markerSize | The default size of the map pin created for each point, in pixels. |
markerSymbol |
string |
<可选> |
GeoJsonDataSource.markerSymbol | The default symbol of the map pin created for each point. |
markerColor |
Color |
<可选> |
GeoJsonDataSource.markerColor | The default color of the map pin created for each point. |
stroke |
Color |
<可选> |
GeoJsonDataSource.stroke | The default color of polylines and polygon outlines. |
strokeWidth |
number |
<可选> |
GeoJsonDataSource.strokeWidth | The default width of polylines and polygon outlines. |
fill |
Color |
<可选> |
GeoJsonDataSource.fill | The default color for polygon interiors. |
clampToGround |
boolean |
<可选> |
GeoJsonDataSource.clampToGround | true if we want the geometry features (polygons or linestrings) clamped to the ground. |
credit |
Credit | string |
<可选> |
A credit for the data source, which is displayed on the canvas. |