split czml to tiles so that it streams data relevant only for that current view

CesiumJS
1

hi

is there any built in implementation for streaming czml only for the current view

in details :

i’m looking for a way to split my big czml to tiles so that czml will load only the relevant data for that specific view

2

Hi Maty,

There’s not any built-in way to do that. We’ve talked about adding one, but don’t have any concrete plans at the moment.

If you feel like tackling it yourself, take a look at the tiledGeometry branch:

https://github.com/AnalyticalGraphicsInc/cesium/tree/tiledGeometry

This adds a QuadtreePrimitive that can be used to render any quadtree-organized data. You’ll still need to divide up your CZML into tiles yourself, and you’ll need to write a tile provider that either adds/removes CZML data sources for a file or incorporates tiled CZML objects into a single data source. I don’t know what the performance would be like for this approach, but I’m very curious to find out.

Kevin

3

Hi Maty,

I'm curious as to whether you were able to accomplish this. I am trying to do the exact same thing.

I have incredibly large CZML files that span the time interval of a day. I can break up the CZML file into several files based on time increments,such as one minute intervals.

If you were able to figure out how to do this, I would love to hear what you did as this could be extremely helpful to me.

Thanks!
Natasha

4

Hi Natasha,

We are working on something, but a little different than what you need.

We took the branch tiledGeometry (works only for primitives) and made adjustments

so that it would be possible to send a REST request to the server with the particular display (tiles) parameters.

then with the return I’m rendering it to the view

Soon I will create a GitHub repository with a code that does this

So if you’re interested I can let you know when it happens.

Maty.

5

Hi Maty,

Thanks for the explanation! And yes, I would love it if you could let me know when the code becomes available via GitHub. I would very much love to look at it.

Thanks for your help.

~Natasha

6

I am very interested in this, can I get link to github?