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I got your point It is even more complex, because it is not necessary 2 point divided by sea. At present moment most longest line of sight is ~538km. Mt. Dankova in Kyrgyzstan to Hindu Tagh in China.
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04-23-2018
05:54 AM
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You are absolute correct. Even Everest is not the point with longest line of sight
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04-23-2018
05:38 AM
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Xander Bakker wrote: should perform viewshed calculations I know viewshed. But for calculation you need one known point (observer). In my case I do not have this information. would require a DTM covering the world ... and point locations of mountain peak and evaluate the line of sight between the points. This would probably require some scripting (or the use Model Builder). Scripting, etc. for me it will be too complex. Do You think it is possible to find GIS Pro (paid help), who could give me answer? Maybe it is too complex even for Pro and it takes years of calculations?
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04-23-2018
05:36 AM
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Xander Bakker wrote: If only an observer height of 1m ... this would limit your site to 3.5 km. This is correct. But we talk not about 1m above sea level - 1m above ground. Finding a line of sight of 503 km would require a flat earth... No. For example both observers are on islands and standing on mountains 2km high. Distance between island is 200km. So we will have clear 200km line of sight. At present moment most longest line of sight is ~538km. Mt. Dankova in Kyrgyzstan to Hindu Tagh in China. I want to know is there exists technology to find out most longest line of sight. Lines of sight | Beyond Horizons
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04-22-2018
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Xander Bakker wrote: Can you elaborate a little more on your specific use case? I want to find 2 most distance points with line of sight. Both points should be ground level (or <1meter (for example)). At this moment longest line of sight is ~503km. I need to find out is longer line of sight exists and where these two points are located.
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04-20-2018
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"Earth's curvature of course and standing on the ground" Sure I'm not talking about flatland, even today is Friday
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04-20-2018
05:14 AM
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As far I'm not familiar with GIS, my question can sound strange 🙂 Is it possible to calculate longest (theoretical) line of sight (in Earth)? I found many tools which can calculate line of sight, but you must know at least point A, which in my case is unknown.
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04-19-2018
10:03 PM
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