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Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

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41–50 of 77 posts

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#41
post #14

In Swiss-Style Relief shading, the light comes from North West, which is impossible in the northern hemisphere. This makes sunny south facing slopes shaded and shaded north facing slopes light. Legend says that this was an intentional design decision, because right handed people usually have their desk lighting on the top left of their desk, giving the map a 3D like appearance. Here's an article on the topic (german…

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Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#42
post #14

In Swiss-Style Relief shading, the light comes from North West, which is impossible in the northern hemisphere. This makes sunny south facing slopes shaded and shaded north facing slopes light. Legend says that this was an intentional design decision, because right handed people usually have their desk lighting on the top left of their desk, giving the map a 3D like appearance. Here's an article on the topic (german…

light-source-up (i.e. shadows-down) is usually the most natural way for humans to interpret shading and lighting. this might have played a role here.

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#43
post #14

In Swiss-Style Relief shading, the light comes from North West, which is impossible in the northern hemisphere. This makes sunny south facing slopes shaded and shaded north facing slopes light. Legend says that this was an intentional design decision, because right handed people usually have their desk lighting on the top left of their desk, giving the map a 3D like appearance. Here's an article on the topic (german…

> In Swiss-Style Relief shading, the light comes from North West I would rather say it comes from the top-left. If you orient your map with the south upwards, it will look ok, as if the relief was shaded in the morning.

well, no, the light source would still come from the north-west.

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#44
post #14

In Swiss-Style Relief shading, the light comes from North West, which is impossible in the northern hemisphere. This makes sunny south facing slopes shaded and shaded north facing slopes light. Legend says that this was an intentional design decision, because right handed people usually have their desk lighting on the top left of their desk, giving the map a 3D like appearance. Here's an article on the topic (german…

This was my first thought too then I remembered my own experiences from every single year. Maybe this is a mid June sun. The sun stays above the horizon more than 12 hours March 21 to Semptember 21, so it must raise and set to the North of the West/East line. If you go North enough it will stay above the horizon all the time in some days and you'll get light directly from the north at midnight.

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#45
post #14

In Swiss-Style Relief shading, the light comes from North West, which is impossible in the northern hemisphere. This makes sunny south facing slopes shaded and shaded north facing slopes light. Legend says that this was an intentional design decision, because right handed people usually have their desk lighting on the top left of their desk, giving the map a 3D like appearance. Here's an article on the topic (german…

As a Swiss guy, I had no idea this was a thing. But then again, I'm also not surprised we needed to have our own special way of doing it.

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#46
post #43

Earlier quoted context omitted.

> In Swiss-Style Relief shading, the light comes from North West I would rather say it comes from the top-left. If you orient your map with the south upwards, it will look ok, as if the relief was shaded in the morning.

well, no, the light source would still come from the north-west.

No, I mean that you have to re-shade the maps with light coming from the south-east, and display them with the south up. This will give the correct effect for the northern hemisphere.

A more universal solution is to orient your maps with east up (which is a common convention), and light them from wherever the sun is. Then the morning light in the rendered maps will always come from the top (in the equator), top-right (northern hemisphere) and top-left (southern hemisphere).

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#47
post #14

In Swiss-Style Relief shading, the light comes from North West, which is impossible in the northern hemisphere. This makes sunny south facing slopes shaded and shaded north facing slopes light. Legend says that this was an intentional design decision, because right handed people usually have their desk lighting on the top left of their desk, giving the map a 3D like appearance. Here's an article on the topic (german…

> the light comes from North West, which is impossible in the northern hemisphere

that is technically not correct, in the summer for sufficiently high latitudes, the sun sets in the northwest.

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#48
post #16

I'm facing the issue on how to aesthetically visualize my hiking and skiing GPS tracks in mountainous terrain (similar to the OP, I live in Switzerland, so it's either up or down). I've decided to go directly the 3D route using Babylon.js, see here for an example: https://cubetrek.com/view/6338 Within Switzerland, it also uses Swiss-style maps as texture, outside of Switzerland a visually similar map style. I'm looki…

Looks fun. I just tried to sign up, but the link I received by email redirected to http://localhost:8080

Damn, that's why I need diligent beta testers ;)

Seems to be some problem in redirecting to the "success page", your email should be verified in any case. I need to look into that.

Edit: seems to be some issue with my Nginx setup.

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#49
post #14

In Swiss-Style Relief shading, the light comes from North West, which is impossible in the northern hemisphere. This makes sunny south facing slopes shaded and shaded north facing slopes light. Legend says that this was an intentional design decision, because right handed people usually have their desk lighting on the top left of their desk, giving the map a 3D like appearance. Here's an article on the topic (german…

> the light comes from North West, which is impossible in the northern hemisphere that is technically not correct, in the summer for sufficiently high latitudes, the sun sets in the northwest.

Yes, not sure in Switzerland but that's indeed the case in the UK.

Re: Eduard: Swiss-Style Relief Shading for Maps Using Machine Learning

#50
post #31

Earlier quoted context omitted.

> an art form Which is why the linked Daniel Huffman's technique employed the convincing results of Blender.

The biggest thing that I'm seeing that Singh has over Huffman is the adjustable detail-preserving terrain smoothing. Detail-preserving blur algorithms don't generalize well. Application-specific NN solutions tend to excel at this problem, by having a model of what details are important vs incidental. I would like to see a combination of the two, with the terrain pre-processed before being used in Blender.

> Application-specific NN solutions tend to excel at this problem, by having a model of what details are important vs incidental

I'd say this is a context in which "the problem of Transparency" becomes evident: we would like to "see why", to come to learn a perfected deterministic algorithm from the implicit model that the NN developed.

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