# Alignling two models exactly

**URL:** https://community.cesium.com/t/alignling-two-models-exactly/25246
**Category:** CesiumJS
**Created:** [July 7, 2023, 11:47am UTC](https://community.cesium.com/t/alignling-two-models-exactly/25246 "2023-07-07T11:47:19Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![Eytan\_Mann](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/eytan_mann/32/11553_2.png) [@Eytan\_Mann](https://community.cesium.com/u/Eytan_Mann)
#### Post date: [July 7, 2023, 11:47am UTC](https://community.cesium.com/t/alignling-two-models-exactly/25246/1 "2023-07-07T11:47:19Z")

</div>

I’m trying to position a model on top of a photogrammetry asset, both are from ION…  
How can I do this? I have both in Blender positioned, but when I upload the tileset to ION the Cartesian3 changes…  
[eytanmann.xyz/herodion/](https://eytanmann.xyz/herodion/)

```auto
(async () => {
    try {
        // ...

        let tileset = await Cesium.Cesium3DTileset.fromIonAssetId(1750337);
        tileset.maximumScreenSpaceError = 1;
        viewer.scene.primitives.add(tileset);
        
        const assetId = 1954186; // Replace with your asset ID
        const resource = await Cesium.IonResource.fromAssetId(assetId);
        const entity = viewer.entities.add({
            position: Cesium.Cartesian3.fromElements(4438223.600063435, 3135682.555670942, 3329316.5869328612),
            model: {
                uri: resource
            }
        });

    } catch (error) {
        console.log(error);
    }
    
})();

```

 ![WhatsApp Image 2023-07-06 at 12.34.36](https://global.discourse-cdn.com/cesium/original/2X/d/d3e29af2d239f2e70bc75f62d49d4c40b99a56f9.jpeg)

---

<div class="post-metadata">

### Author: ![Gabby\_Getz](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/gabby_getz/32/7838_2.png) [@Gabby\_Getz](https://community.cesium.com/u/Gabby_Getz)
#### Post date: [July 20, 2023, 7:39pm UTC](https://community.cesium.com/t/alignling-two-models-exactly/25246/2 "2023-07-20T19:39:56Z")

</div>

> the Cartesian3 changes…

Which Cartesian3? Are you sure you’re using the same reference system?