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Linear Line of Sight of given elevation (not DTED's elevation)

oyleiste

Hello

I'm able to get linear line of sight of two points and draw visible and invisible areas like this: [ATTACH=CONFIG]23005[/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
Regards

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Screenshot 2026-03-13 101741.png

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Accepted answers

NeilClemmons_GISinc

Set the Z value for the point (IPoint.Z) to the elevation value you want to use. Make sure the point is z-aware first (IZAware.ZAware = true).

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NeilClemmons_GISinc

Set the Z value for the point (IPoint.Z) to the elevation value you want to use. Make sure the point is z-aware first (IZAware.ZAware = true).

JasonPike

Hello

I'm able to get linear line of sight of two points and draw visible and invisible areas like this: [ATTACH=CONFIG]23005[/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
Regards

Instead of +1 on the line below, could you not just add the distance between the helicopter and the surface?

 // observer is 1m (MA start point offset) above the ground.
observer.Z = rsc.GetElevation( observer )+1;

oyleiste

Thank you Neil & ScJpike
You're great 🙂

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