[C#] How to create Line of Sight?

[oyleiste]

Hello

I'm able to load a DTED Level 0 file into a RasterDataset, color it and create a IRasterLayer from it to add into axMapControl. Here is my working code:

IWorkspaceFactory wsf = new RasterWorkspaceFactoryClass(); IRasterWorkspace rasterWS = (IRasterWorkspace)wsf.OpenFromFile(@"C:\Users\ABC\Desktop\DTED_E30N40\dted\e034", 0); rasterDS = rasterWS.OpenRasterDataset("n40.dt0");  IRasterBandCollection pRasterBandCollection = (IRasterBandCollection)rasterDS; IEnumRasterBand pEnumRasterBand = pRasterBandCollection.Bands; IRasterBand pRasterBand = pEnumRasterBand.Next(); pRasterBand.ComputeStatsAndHist(); IRasterStatistics pRasterStatistics = pRasterBand.Statistics;  IRgbColor pFromColor = new RgbColorClass(); pFromColor.Red = 20; pFromColor.Green = 20; pFromColor.Blue = 220;  IRgbColor pToColor = new RgbColorClass(); pToColor.Red = 220; pToColor.Green = 20; pToColor.Blue = 20;  IAlgorithmicColorRamp pAlgorithmicColorRamp = new AlgorithmicColorRampClass(); pAlgorithmicColorRamp.FromColor = pFromColor; pAlgorithmicColorRamp.ToColor = pToColor; pAlgorithmicColorRamp.Algorithm = esriColorRampAlgorithm.esriHSVAlgorithm; pAlgorithmicColorRamp.Size = 255;  bool bOK; pAlgorithmicColorRamp.CreateRamp(out bOK);  IRasterStretchColorRampRenderer pRasterStretchColorRampRenderer = new RasterStretchColorRampRendererClass(); pRasterStretchColorRampRenderer.BandIndex = 0; pRasterStretchColorRampRenderer.LabelHigh = pRasterStatistics.Maximum.ToString(); pRasterStretchColorRampRenderer.LabelLow = pRasterStatistics.Minimum.ToString(); pRasterStretchColorRampRenderer.ColorRamp = pAlgorithmicColorRamp;  IRasterLayer rasterLayer = new RasterLayer(); rasterLayer.CreateFromDataset(rasterDS); rasterLayer.Name = "DTED Level 0 [E34-N40]"; rasterLayer.Renderer = (IRasterRenderer)pRasterStretchColorRampRenderer; axMapControl1.AddLayer(rasterLayer);

The result is this screenshot of axMapControl:[ATTACH=CONFIG]22980[/ATTACH]

Now, I want to create Line of Sight; between observer and a point. How can I do that? I have no idea unfortunately.

Thanks

[JasonPike]

Thank you very much Neil; for mentioning ISurface and thank you ScJpike; for your helpful link 🙂

Now, I'm able to get linear line of sight of two points, as you see: [ATTACH=CONFIG]23004[/ATTACH]

Well, is there any way to give observer's Z (elevation) and get line of sight of that point with given Z (not the elevation in DTED)? Imagine that I want to get LLOS of a helicopter that abviously it's elevation is greater that DTED's elevation of that point.
Or it's only possible with DTED elevations? Any idea?

Thank you very much guys
Sincerely

Glad we could help.

You should probably post a new thread for the new question.

[oyleiste]

Jason, I appreciate your help.
I started a new thread. I hope get my answer there.

Thanks again