# Polyline data on terrain provider

**URL:** <https://community.cesium.com/t/polyline-data-on-terrain-provider/18374>\
**Category:** CesiumJS\
**Created:** [April 28, 2022, 1:25pm UTC](https://community.cesium.com/t/polyline-data-on-terrain-provider/18374 "2022-04-28T13:25:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tharak](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/tharak/32/8319_2.png) [@Tharak](https://community.cesium.com/u/Tharak)\
**Post date:** [April 28, 2022, 1:25pm UTC](https://community.cesium.com/t/polyline-data-on-terrain-provider/18374/1 "2022-04-28T13:25:19Z")

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Dear Support,

I have my own elevation data and loaded on cesium as terrain provider. In the same area I have polyline data loaded as geojson format. But my polyline data is going under my elevation data. How to bring this data and display on top elevation data.

Regards,  
Tharak

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<div class="post-metadata">

**Author:** ![Jacky](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/jacky/32/7686_2.png) [@Jacky](https://community.cesium.com/u/Jacky)\
**Post date:** [April 29, 2022, 7:11am UTC](https://community.cesium.com/t/polyline-data-on-terrain-provider/18374/2 "2022-04-29T07:11:48Z")

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Hi,  
You can convert Polyline positions to clamped positions. Check this [example](https://sandcastle.cesium.com/?src=Sample%20Height%20from%203D%20Tiles.html).  
You can also set [clampToGround](https://cesium.com/learn/cesiumjs/ref-doc/PolylineGraphics.html#clampToGround) property as true.

- Regards