# How would you make a dome or semi-ellipsoid?

**URL:** <https://community.cesium.com/t/how-would-you-make-a-dome-or-semi-ellipsoid/12738>\
**Category:** CesiumJS\
**Created:** [March 24, 2021, 3:26pm UTC](https://community.cesium.com/t/how-would-you-make-a-dome-or-semi-ellipsoid/12738 "2021-03-24T15:26:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ssteph](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/ssteph/32/1987_2.png) [@ssteph](https://community.cesium.com/u/ssteph)\
**Post date:** [March 24, 2021, 3:26pm UTC](https://community.cesium.com/t/how-would-you-make-a-dome-or-semi-ellipsoid/12738/1 "2021-03-24T15:26:19Z")

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I’m wondering if this is possible to make an entity or primitive of an a semi-ellipsoid. I want to essentially make a “dome” over a point on the globe surface. Is there a recommended or easy way to do this?

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**Author:** ![dzung](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/dzung/32/2996_2.png) [@dzung](https://community.cesium.com/u/dzung)\
**Post date:** [April 2, 2021, 7:24pm UTC](https://community.cesium.com/t/how-would-you-make-a-dome-or-semi-ellipsoid/12738/2 "2021-04-02T19:24:49Z")

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You can use an ellipsoid and change the maximumCone property. Here is an example code snippet: [Sandcastle example](https://sandcastle.cesium.com/#c=bVHLbsIwEPyVVU5Bog4pBQQE1JZyqERF1VJ6iYQMWWBVx45sBwqIf28C4ln2YHvWM6PxesE1LAiXqKEFEpfQQUNpzIa7nhs6kx3uKGk5SdShU2iGMpR7DUNpyRIaxqPI3YQyUSbDSjYOPh2ubXbissymWsUvONOIxr2rVZhfffCr1VoRynVWr9znVSiGEgCFoMQoihqwyTGA5hFR4zzfydf1S3kV4XLfWwHE/Jfi3QPwGOqN2zl7fx31h92P0eC7f6Ra1MTFKbwSSrPn3leXLcnOn0Qy526JVQ7eKrWCcl+rU9z1ttm6vZjQWql4oNyreRWaTtEJjF0JbO+9AB4pTpS2kGrhMuZZjBORJTLeOJ38oGUTY3LnnBp459IgogVQ1LrxWTAR3JjsZpoK8UlrDJ124GX8f1KhshnLWX+BWvBVTpv77d6+yRgLvAzeVlqlxJjrK+c/).

 ![image](https://global.discourse-cdn.com/cesium/original/2X/3/321250c559f9f3981dc5d4d7946a5922edfc0087.jpeg)