Infinity Code Forum — Help with loading Altitude/Elevation data as TMS from GeoServer

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-11-21T09:43:54Z

Thanks for letting me know. I'll ask my colleague if he is able to edit the maps for me.

I store them in the materials to get the tile images in the correct order. I'll make sure to do it a different way. If I manage it I'll post the code on here.

Thanks for your help

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-11-20T18:09:24Z

Hello.

No, Online Maps does not have built-in features to load GeoTiff or DEM.
You must load the data and pass it to the map.

Your way of loading elevation data is extremely expensive.
It just kills the performance of the application.
Perhaps your server can return 32x32 elevations for the required area.
This will save a lot of time on both sides (client and server).

You have an incorrect heightmap as a result.
I do not know why this happened in your case.
It needs to be tested to say definitely what is wrong.

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-11-20T14:29:15Z

and the image:

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-11-20T14:26:21Z

ps:

I did try a solution but I'm sure it was wrong:

Online Maps uses 32 instances of a material for each tile. I cheated and made it so that whenever I downloaded a geotiff tile, I would set the geotiff as "overlayBackTexture" of the tile. Then I would make a composite image of the 32 tile images stored in the overlayBackTexture and convert that into a short[32,32] array and set elevation from that. The resolution of each tile image was 256x256.

(see attached files)

I would obviously get a very bad looking heightmap but I wanted to know if I might have been going in the right direction.

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-11-20T14:01:36Z

I also have a similar question about handling GeoTiff Elevation data. I have seen some solutions where people convert GeoTiff to DEM data. Does Online Maps have an inbuilt way handling GeoTiff and/or DEM data?

I'm trying to find some public data I can send to you as an example. My colleague set me up with a local geoserver install to work with on my laptop. I'm trying to find a public link I can send to you. If it helps, the link I use reads like this:

[localhostURL]/wms?service=WMS&version=1.1.0&request=GetMap&layers=jump:elevation&styles=&bbox=-180.0,-90.0,180.0,90.0&width=768&height=384&srs=EPSG:4326&format=application/openlayers

(I edited the link above as I'm only allowed to post one link for some reason)

...which gives me the collection of GeoTiff tiles as shown in the attached image

I can download the GeoTiffs and convert them pngs and/or byte arrays but that is as far as I get. I have seen that people convert geotiff to Digital Elevation Maps (DEM) before handling them in Unity. Does Online Maps have a toolset for handling GeoTiff/DEM data?

Sorry I could not give you a url to work with but as soon as I can find an online example I will send it to you. All I know is that the data we are using is DTED Level 0 (free) LandSat data.
http://vterrain.org/Elevation/dted.html

Thanks in advance

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-09-27T14:10:31Z

I understand, I figured you might have a url which you can use and share with us or maybe an entire example you could share with us of OnGetElevation(). Sorry for the misunderstanding.
So I'v been having trouble too on adding correct code to OnGetElevation(). However It might be that the url I am using is not the right format. Right now the script runs and i'm getting height but the heights are always the same. meaning, my OnGetElevation() always return the exact same array values regardless of the vectors topLeftCoodrs and bottomRightCoords.

I'm attaching my script here any input would be greatly appreciated.

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-09-25T17:17:56Z

Hello.

Unfortunately, I did not understand what url you expect to get from me.

If you mean url of topic starter, then:
1. I do not have this.
2. In any case, I would not give it to you, because this is private information of the person who applied for support.
I do not have the right to publish such information.

If you asked about something else, please explain this in detail.

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-09-25T07:22:02Z

Alex, could you please provide us with a working url so we could test if the problem is in our code or with our url?

Thank you,
Danielle

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-03-15T23:26:46Z

No, there is no easy way.

P.S. In my first post of this thread, I have offered you help.
Your security policy is not my business.
But it really hurts me to see that you have not been able to do it in a month.
Yes, that it is quite a difficult task.
For me it's a task for an hour, and for you, I think, for another month.
So I'm offering you help again. You know what I need for this.
Think about it.

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-03-15T11:51:31Z

So I'm looking to how to go about setting the elevation properly. I get the bounds from OnGetElevation (top left and bottom right). In the attached image I am generating files with their top left and bottom right within these bounds. My thinking was that I would stitch these in order to get a composite image which I can then set as elevation. I have a feeling I am over-complicating things.
Is there an easy way to export the current tileset as a whole image which I can then convert to a short[,]?

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-03-13T11:34:02Z

Yes, and send to Online Maps exactly the data, the coordinates of which it give to your script.

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-03-13T09:16:56Z

Ah right. I had a feeling that might have been the case. Would I have to composite the tiles into a single image before converting it to elevation data?

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-03-10T19:18:10Z

Your code is not correct.
The current version of Online Maps uses elevation data for the entire map, and not for tiles.
To OnGetElevation are passed the coordinates of the area for which you need to get elevations.
You load elevations for tiles, and this is not the same.

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-03-10T15:17:29Z

Ah yes you're right. Here's the new one

Re: Help with loading Altitude/Elevation data as TMS from GeoServer

2017-03-10T15:06:09Z

Are you sure this is the last version of the script?!
It does not contain anything on line 72.

P.S. For tile textures use:
texture.wrapMode = TextureWrapMode.Clamp;