Allows the user to define a fixed image overlay. This can take the form of a button, a logo, whatever. The image can also be assigned a hyperlink that will be triggered if clicked on.
| Attributes |
| Name | Required | Request-time | Type | Description |
| id | true | true | java.lang.String | A map unique identifier for this image |
| url | true | true | java.lang.String | The url to the image to display |
| opacity | false | true | float | The opacity level (0 to 1) for the image. |
| link | false | true | java.lang.String | The hyperlink url to load if the image is clicked. |
| x | false | true | int | The x location for the image (relative to the map). |
| y | false | true | int | The y location for the image (relative to the map). |