Get the most north/south/east/westbound coordinates of map

CesiumJS
1

Hello Cesium,

Was wondering if there is a way for Cesium to determine what the most northbound, southbound, eastbound and westbound coordinates of the globe are visually?

I am trying to create a bounding box that contains these values.

The way I would do it is to use the Camera.PickEllipsoid function, providing the top left x,y screen coordinates to obtain west/northbound and bottom right x,y screen coordinates to obtain east/southbound lon/lat.

This, however, fails when the map is zoomed out to the point that the map does not cover the entire browser window.

Any tips/help is appreciated! If I am unclear with my explanation, please let me know and I will clarify.

Cesium version: 1.29
Windows 7
Firefox Version: 51.0 (64 bit)
Chrome Version: 56.0.2924.87 (64 bit)

Thanks!

2

Hello,

You can use the function Camera.getRectangleCameraCoordinates to get the portion of the globe that is currently in view by the camera.

Best,

Hannah

3

Hi Hannah,

Thank you for showing me this method. I must have overlooked it.
I am unsure how to use Camera.getRectangleCameraCoordinates to retrieve what I need though.

From what I understand, the argument this method requires (rectangle) is actually what I need returned.

The method states it returns a Cartesian3.

Please correct me if I'm wrong.

Thanks!

4

Oh sorry! I was thinking of the wrong function. Here’s the one you actually want: Camera.computeViewRectangle
That will give you the visible rectangle.

-Hannah