# The most efficient way to draw curved polyline from two point datasets

**URL:** <https://community.cesium.com/t/the-most-efficient-way-to-draw-curved-polyline-from-two-point-datasets/27055>\
**Category:** CesiumJS\
**Created:** [September 28, 2023, 11:08pm UTC](https://community.cesium.com/t/the-most-efficient-way-to-draw-curved-polyline-from-two-point-datasets/27055 "2023-09-28T23:08:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Federico\_Marcantogni](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/federico_marcantogni/32/12874_2.png) [@Federico\_Marcantogni](https://community.cesium.com/u/Federico_Marcantogni)\
**Post date:** [September 28, 2023, 11:08pm UTC](https://community.cesium.com/t/the-most-efficient-way-to-draw-curved-polyline-from-two-point-datasets/27055/1 "2023-09-28T23:08:52Z")

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Need to plot hundreds of polylines or arcs where the centre of the polyline is raised and smoothly curved.

This example is close, though it seems time-dependent whereas my polylines have only static information and no need for time: [CZML Polyline - Cesium Sandcastle](https://sandcastle.cesium.com/?src=CZML%20Polyline.html)

So what is the most efficient way to draw smoothly bent lines with the centerpoint raised between the start and end of the line?

many thanks

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<div class="post-metadata">

**Author:** ![Federico\_Marcantogni](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/federico_marcantogni/32/12874_2.png) [@Federico\_Marcantogni](https://community.cesium.com/u/Federico_Marcantogni)\
**Post date:** [September 29, 2023, 5:21am UTC](https://community.cesium.com/t/the-most-efficient-way-to-draw-curved-polyline-from-two-point-datasets/27055/2 "2023-09-29T05:21:48Z")

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The result should look like the link below, however, I fear that the interpolation algorithm used in that example will likely use a lot of memory if hundreds of lines are drawn together with many other entities - hence my quest for the most efficient way to do this also without the time dependency

[Hello World - Cesium Sandcastle](https://sandcastle.cesium.com/index.html#c=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)

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<div class="post-metadata">

**Author:** ![Federico\_Marcantogni](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/federico_marcantogni/32/12874_2.png) [@Federico\_Marcantogni](https://community.cesium.com/u/Federico_Marcantogni)\
**Post date:** [September 29, 2023, 1:51pm UTC](https://community.cesium.com/t/the-most-efficient-way-to-draw-curved-polyline-from-two-point-datasets/27055/3 "2023-09-29T13:51:12Z")

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I think I have sorted it out starting from the example above 🙂  
Here is the sandcastle: [Cesium Sandcastle](https://sandcastle.cesium.com/#c=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)