Converting sphere bounding volume to latitude and longitude

CesiumJS
1

Hi,

I have a Cesium 3D tileset covering an area in Boston with a root bounding volume as follows:

"boundingVolume":{"sphere":[1527780.02515,-4464217.70308,4277167.40653,3535.57128]}

How can I convert this to latitude and longitude? I read some documentation and reviewed some source code, but could not figure it out.

Thanks for your help!

Randy

2

Assuming your current specification is ECEF, which can be represented as Cartesian3 in Cesium, you want to convert to LLA, which is Cartographic in Cesium. So something like:

var lla = new Cesium.Cartographic.fromCartesian(new Cesium.Cartesian3(1527780.02515,-4464217.70308,4277167.40653,3535.57128));

3

Thank you!

FYI, the following code produces a latitude of 42.3834206746632 degrees and a longitude of -71.10762047720543 degrees, which is what I was looking for.

var cartesian = new Cesium.Cartesian3(1527780.02515, -4464217.70308, 4277167.40653);
var cartographic = Cesium.Cartographic.fromCartesian(cartesian);
var latitude = Cesium.Math.toDegrees(cartographic.latitude);
var longitude = Cesium.Math.toDegrees(cartographic.longitude);