Help with loading Altitude/Elevation data as TMS from GeoServer

Hi

So I can successfully get my elevation tiles. These tiles are GeoTiff images which are served via a GeoServer link. I have attached a cs file with my solution.

However I think my method for converting bytes to "new short[32,32]" is wrong:

    short[,] GetElevation(byte[] bytes)
    {
        int bRef = 0;
        short[,] elevation = new short[32, 32];
        for (int width = 0; width < 16; width++)
        {
            for (int height = 0; height < 16; height++)
            {
                short val = (short)(bytes[bRef]);
                elevation[width, height] = val;
                bRef++;
            }
        }

        return elevation;
    }

Hi

So the tiles are formatted as 256x256 png image with a bit depth of 32. I'm wondering whether the byte array I am using is wrong.

(because of forum rules, requestw = request.www)

My first method for getting byte array is like so:

byte[] bytes = requestw.bytes;

The length of this array is 1784

However if I use a different method, the byte array is different:

Texture2D tex = new Texture2D(256, 256);
requestw.LoadImageIntoTexture(tex);
byte[] bytes = tex.EncodeToPNG();

The length of this array is 1670

What is the correct way to grab the elevation data from the tile in byte form?

Ah yeah you make a good point. I'll give that a try. Thank you!

As GetPixel returns a Color[], would I have to pass the greyscale value of each pixel to the short[,] array?

So I managed to make some progress. I think I am asking it to set elevation in the wrong place. When I pan across the map. It looks like it's trying to set multiple heightmaps for the same tile. I have attached my latest script. I set elevation on line 72. IS this the right place to do it?

Gif available here:
https://www.dropbox.com/s/81eu4he706zej … n.gif?dl=0

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

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?

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[,]?

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

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.

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.

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.