Cesium- Offline terrain elevation data

CesiumJS
1

Can you please provide me .terrain files? I need offline terrain elevations data.
I tried accessing this link: http://sergeserver.dyndns.org/phocadownload/terrain.tar.gz

But now it seems the hostname does not exist.

2

Hi there,

Here is some sample data for you to try: https://github.com/AnalyticalGraphicsInc/cesium/tree/master/Specs/Data/CesiumTerrainTileJson

Hope that helps,

  • Rachel
3

Hi,

Actually, for the below code:

var terrainProvider = new Cesium.GeoserverTerrainProvider({

url : “http://localhost:8080/geoserver/wcs/wms”,
layerName: “wcs:clip11(reproject)”,
waterMask:true
});
globe.terrainProvider = terrainProvider;

Where do i get the geoserver folder from?

[The geoserver folder to be hosted at 8080]

4

Hi there,

Here is some global terrain data: https://cesiumjs.org/data-and-assets/terrain/index.html

However, note that it’s free for Internet use, but click on the individual datasets for information on offline terms of use.

Hope that helps,

  • Rachel
5

Hi,

When i write below code:
terrainProvider : new Cesium.CesiumTerrainProvider({

url : ‘//assets.agi.com/stk-terrain/world’

})

I can see map on the globe , but when i write below code:

var terrainProvider = new Cesium.GeoserverTerrainProvider({

url: “http://localhost:8080/geoserver/wms?SERVICE=WMS&REQUEST=GetCapabilities&tiled=true”,

layerName: “SRTM90”,

styleName: “grayToColor”,

waterMask: true

})

Then i cant see neither map nor globe. Whole screen becomes black when i from switch from ol3 to ol3cesium using below code:

this.map = new ol.Map({

});

this.ol3d = new olcs.OLCesium({ map: this.map });

Why is it coming as black!

6

Hi,

Have you tested the GeoserverTerrainProvider is working in a pure Cesium application?

Guillaume

7

Hi,
No, I havent tested ‘GeoserverTerrainProvider’ on a pure cesium app.

Actually my app is not purely cesium app, my app should support both ol3 and ol3cesium/cesium.

So, i have made a button, which allows switching from 2d to 3d mode (i.e. ol3 to ol3cesium mode). But now in the 3d, i.e. ol3cesium globe mode, I have to show elevations using offline data. For which i made the geoserver setup done.

But now the problem is coming up that earlier i was able to see the map using :

source: new ol.source.Stamen({

layer: ‘terrain’

})

map in ol3 and when switching to ol3cesium i was able to see elevations using:

var terrainProvider = new Cesium.CesiumTerrainProvider({

url: ‘https://assets.agi.com/stk-terrain/world’

});

scene.terrainProvider = terrainProvider;

BUT, now when i switch to ol3cesium i see blank screen , i cant see globe when i use:

var terrainProvider = new Cesium.GeoserverTerrainProvider({

//url: “http://localhost:8080/geoserver/wms?SERVICE=WMS&REQUEST=GetCapabilities&tiled=true”,

layerName: “SRTM90”,

styleName: “grayToColor”,

waterMask: true

});

Thanks.

8

Hi,

Yes I understand your use case, I am the main dev of OL-Cesium.

Making sure the problem is not a pure Cesium bug would help analyze your issue.

Guillaume

9

Hi Guillaume,

I solved the blank black screen problem by changing the code as below:

var globe = new Cesium.Globe(Cesium.Ellipsoid.WGS84);

var terrainProvider = new Cesium.GeoserverTerrainProvider({

url: “http://localhost:8080/geoserver/ows?service=wms&version=1.3.0&request=GetCapabilities”,

//layerName: “SRTM90”,

//styleName: “grayToColor”,

waterMask: false

});

globe.terrainProvider = terrainProvider;

Am not sure if this is the correct way though.

BUT, i cant see any elevations ! What am i missing?

Please guide.

10

Don’t know.

Have you considered using https://github.com/geo-data/cesium-terrain-builder instead?

11

I am trying to install cesium terrain builder, but getting an error of wanting gdal version 2.0.0 during setup.

I think using ctb i can convert .tif to .terrain and then use those .terrain files in my app. Right?

12

Yes

13

Hi Guillaume,

I have got the elevations of a particular region by hosting the .terrain files on a local server on my machine by below code:

var terrainProvider = new Cesium.CesiumTerrainProvider({

url: ‘http://localhost:8080/terrain/terrain_52_06’

});

this.scene.terrainProvider = terrainProvider;

But now i dont want it from “server”, but read directly from the local filesystem without server then what should be the code ?

14

Please guide…

How to read directly from the local filesystem without server. What should be the code ?

15

The files must be hosted on a server in order for Cesium to access them – this is just a general security feature of the browser.

Hope that helps,

  • Rachel
16

Hi Rachel,

My web app is already hosted on node server at 3005. So i wrote below code:

var terrainProvider = new Cesium.CesiumTerrainProvider({

url: ‘./app/map/terrain_52_06’

});

this.scene.terrainProvider = terrainProvider;

I get to see elevations of that one area. BUT i can also see unwanted elevated spikes all over remaining world.

What could be the issue?

17

Hi there,

It looks like this might be either a server configuration problem, or a problem directly with your tileset. Unfortunately, this isn’t enough information for us to help you diagnose your problems. I would recommend checking the rest of your setup, because I’m not sure this is a directly Cesium issue. If you narrow it down a little more, perhaps we could help answer more specific questions.

Hope that helps,

  • Rachel
18

Actually my app is running on node server (port 3005) and when i host terrain elevation data on tomcat (port 8080) and enable CORS, I get to see perfect elevations of my one area.
But when i don't use tomcat and host data from node server (port 3005) using code shared before, I can see unwanted elevated spikes.