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horizon line (skyline, skyline-diagram)

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09-14-2011 11:55 PM
ReinhardPrestele
New Contributor
Hi,

for a site analysis I need the the distance and elevation angle from an observer point to objects at the horizon. I tried to implement this with the skyline and skyline-diagram function based on a raster DEM. So far, so good. But then the problems begin:

- "Skyline" doesn't use the elevation (Z-coordinate) of the observer point to draw the horizon line, but the elevation value of the raster. Is there a option to draw the skyline e.g. from a point two meters above the surface?

- "Skyline" actually includes a option to integrate earth's curvature, but it isn't possible to activate this option in the mentioned case. How it can be activated?

I would be glad if anyone have same ideas, because I spent a lot of time in esri-help and others without success...

Thanks,

rpres
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2 Replies
ReinhardPrestele
New Contributor
...the problem is still up-to-date. Are there any ideas?
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ThomasSlingsby
Emerging Contributor
Hi,

Converting your Observer points to 3D points using the  Feature to 3D by Attribute tool should solve your problems.

Alternately you could try setting the points base heights from the surface and applying an offset to raise them above the surface.
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