topic Re: Custom Elevation Layer with Exaggeration in ArcGIS JavaScript Maps SDK Questions

Custom Elevation Layer with Exaggeration

Wade — Tue, 12 Oct 2021 12:39:15 GMT

This example is for all elevations

https://developers.arcgis.com/javascript/latest/sample-code/layers-custom-elevation-exaggerated/

If i want to a range elevations make changes, Is there a way?

Re: Custom Elevation Layer with Exaggeration

JohnGrayson — Tue, 12 Oct 2021 17:22:53 GMT

Here's a modified version of the example that shows how to control which elevation values get exaggerated:

https://codepen.io/john-grayson/pen/YzxXKLO

Re: Custom Elevation Layer with Exaggeration

SailiTang1 — Tue, 12 Oct 2021 17:34:27 GMT

Do you mean you want to change the "exaggeration" value?

properties: {
exaggeration: 70
},

Re: Custom Elevation Layer with Exaggeration

Wade — Wed, 13 Oct 2021 00:29:25 GMT

I want to change to control which elevation values get exaggerated

Re: Custom Elevation Layer with Exaggeration

Wade — Wed, 13 Oct 2021 00:52:14 GMT

Thank you.

This example is for Elevation data values, Can use Elevation extent?

if((data.values[i] >= onlyExagerateElevationRange.min) && (data.values[i] <= onlyExagerateElevationRange.max)){
data.values[i] = data.values[i] * exaggeration;
}

Re: Custom Elevation Layer with Exaggeration

JohnGrayson — Wed, 13 Oct 2021 15:27:16 GMT

One possible way to do this is to use a local viewing mode and set the clip area as needed. I updated the codepen example to show this concept.

Re: Custom Elevation Layer with Exaggeration

Wade — Thu, 14 Oct 2021 05:27:46 GMT

I build localArea, SceneView can use, and ExaggeratedElevationLayer load fullExtent use clippingArea.

Want to present Depth effect, Seems inappropriate.

const localArea = new Extent({
spatialReference: { wkid: 3857 },
xmin: -2.0037507842788246E7,
ymin: -2.0037508659999996E7,
xmax: 2.0037507842788246E7,
ymax: 2.0037508340000004E7
});

this.addResolvingPromise(
this._elevation.load().then(() => {
this.tileInfo = this._elevation.tileInfo;
this.spatialReference = this._elevation.spatialReference;
this.fullExtent = clippingArea;
})
);

Re: Custom Elevation Layer with Exaggeration

JohnGrayson — Thu, 14 Oct 2021 15:34:44 GMT

So you want to have two different exaggerations in the same display? I don't think that using a clippingArea or setting the fullExtent will not work for that use case. You'd have to modify the elevation values in such a way where you provide a smooth elevation transition at the edges of the overall extent of your area of interest. Another possibility is to publish a new Elevation Layer that already has the elevation values exaggerated and smoothed at the edges to ensure a good visual transition between your area of interest and the rest of the display.

Re: Custom Elevation Layer with Exaggeration

Wade — Fri, 15 Oct 2021 01:52:29 GMT

I want to have different exaggerations in the same display,It's like being able to freely choose the area to be changed.

Thank you for your advice, I will try.

Re: Custom Elevation Layer with Exaggeration

Wade — Sat, 16 Oct 2021 15:10:04 GMT

I want to dig a hole at elevation layer, Can only be created with BaseElevationLayer way ?

These problems are due to the display of objects underground.

Re: Custom Elevation Layer with Exaggeration

JohnGrayson — Mon, 18 Oct 2021 17:12:26 GMT

Creating a custom elevation services specific to your needs is one option. If you'd like to use the BaseElevationLayer then you have full control of the extent of the layer and the elevation values used. I updated the codepen to show how you could use a constant elevation, an elevation offset, or an exaggerated elevation value. https://codepen.io/john-grayson/pen/YzxXKLO

I hope this helps.

Re: Custom Elevation Layer with Exaggeration

Wade — Tue, 19 Oct 2021 00:14:42 GMT

Thank you very much for your help.