ArcGIS for javascript: GraphicsLayer and arcgisjavascript

ArcGIS for javascript: GraphicsLayer and arcgisjavascript

1) first obtain the plane coordinate, and instantiate the coordinate object based on the corresponding coordinate system, as shown below:

Var point = new esri. geometry. Point (xpoint, ypoint, new esri. SpatialReference ({wkid: 4326 }));

The value after wkid must select the Coordinate System Standard corresponding to the current GIS, not necessarily 4326!

2) instantiate the content Template

Var infoTemplate = new esri. InfoTemplate (content, "<a href = 'javascript: showDetail () '> View Details </a> ");

3) instantiate graphical symbols

Var symbol = new esri. symbol. PictureMarkerSymbol ("images/red.png", 25, 25 );

4) instantiate Basic Elements

Var graphic = new esri. Graphic (point, symbol, null, infoTemplate );

5) instantiate GraphicsLayer

GraphicLayer = new esri. layers. GraphicsLayer ();

6) add elements to the Image Layer

GraphicLayer. add (graphic );

7) center the current Coordinate

Map. centerAt (point );

Note: Sometimes the center effect is invalid because the third coordinate system parameter of Point is incorrect. Therefore, you must first understand the coordinate system of the GIS layer!

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