How can i specify a part of map?

CesiumJS
1

Im working on a agriculture project that consists
monitoring farms along Portugal. I saw if i want to represent only a country in a map i need to implement a geojson file to do that, like a mask. Although i don t find a specifc implementation of that. Someone knows how to do something like that? (hide the world and represent a specific big region)

2

You need to set clippingPolygons of the globe of the scene.

3

Thanks @Dizzany for your question.

And thank you @ZhefengJin for providing the right advice regarding using clippingPolygons.

We have a sandcastle example demonstrating how to use clippingPolygons. You can use the inverse clipping options to keep the targeted region and remove all other terrain. Cesium Sandcastle

Please let us know if you have further questions.

Best,
Luke