This is great.
I am sitting in an Airbnb in Chamonix wondering where has good sunshine for skiing today?
Now I know.
Show HN: 3D map of shade around the world
61–70 of 72 posts
Re: Show HN: 3D map of shade around the world
#62Earlier quoted context omitted.
Hey. Very cool project. I have an idea. How about you add option to show buildings. That way, people can use this to detect shade on their rooftop solar panels and its stuff. That would be something great
It's something I'm working towards. Right now you can see building shadows at street level zoom, but they're quite rough. Check out shadowmap.org, which is a project that does buildings well.
wow. that is impressive.
Re: Show HN: 3D map of shade around the world
#63Very, very nice, pleasant to use, instructive. 3D exploration is uncommonly pleasant.
I would suggest, in order to increase the visual "information" (as opposed to a blurry landscape), to:
-- give the option to exaggerate the altitudes. Currently, mountains are evident but hillsides are almost indistinct from plains.¹
-- try more relief highlighting colours, like those in DerStefan's opentopomap.org in zoom levels 1 to 8.
¹Please see the work of Anton "Antartis" Balazh, https://news.ycombinator.com/item?id=29686462 : that kind of rendering should be inspirational - I have seen little better.
Re: Show HN: 3D map of shade around the world
#64Google Maps desktop has this but in for building shadows – past a certain zoom level but without a time slider.
It also only takes into consideration building hight but not elevation/topology on which the building sits.
I regularity use this in summer when picking a place to have lunch with friends/coworkers outdoors.
You can make sure you sit in the sun (or the shade) at that time.
Re: Show HN: 3D map of shade around the world
#65Deeply awesome - I wouldn't have dreamed that it could perform so well! (even works nicely on my 200€ phone) It would be fascinating to read more of the design and data structuring behind it (if you find the time & will & it doesn't disclose too much secret sauce)
But I really came here to say that by fat fingering I hit your earlier equinox posting [0] which sadly didn't get noticed. Coupled with the ability to easily change the date it's the clearest demonstration I've ever seen of axial tilt and the lovely fact that the sun rises & sets due east & west for EVERYWHERE on that day. (it's also about the only thing a Mercator projection really excels at)
[0] https://shademap.app/#40.71396,-117.46582,5z,1632318265676t,...
Re: Show HN: 3D map of shade around the world
#66Hi HN. I've been learning WebGL and working on this project for about a year. I posted it previously when it worked in 2D and wanted to share it again because the 3D really makes the shade come to life. Most of the credit for the update due to migrating from Leaflet to Mapbox GL JS.
This is some cool work. Could you elaborate more on the algorithm used? How do you go from height map to near-real-time shadows given time of day/year? Is it all through raycasting or a faster technique?
Re: Show HN: 3D map of shade around the world
#67Great job. I’ve always felt “sun impact” is one of those things that are never well presented in real estate, so maybe there’s a market gap there. Even just figuring out where the sun will be coming from and when it rises at certain parts of the year seems semi-trivial (there’s a couple of web apps around that have been doing it for years), but it’s rarely well integrated in the presentation of an object to be sold or rented out.
Re: Show HN: 3D map of shade around the world
#68Earlier quoted context omitted.
I use Mapbox terrain RGB [1]. A good free alternative is Nextzen [2], but they do not generate tiles past zoom level 15 (Mapbox does it to 20) and there are some random elevation spikes that Mapbox has cleaned up. I'm looking forward to a LIDAR elevation tile set becoming available because it can be loaded into Shademap without any modification and hopefully display shade from trees. [1] - https://docs.mapbox.com/hel…
Are there current plans for a lidar derived surface elevation tile from mapbox? Even the USGS 3DEP program only offers preprocessed DEMs (that is, DTMs). I can see generating that sort of thing at ~5-10m resolution on a global scale from satellite imagery / photogrammetry. A global or even regional DSM would be quite a product.
Not that I'm aware of. Just speculation that people would pay for such a data set.
Re: Show HN: 3D map of shade around the world
#69This is really cool! It might come in handy when house or property hunting. Here is another, similar tool I have found helpful for gardening. https://www.suncalc.org/
Absolutely! I remember looking at some houses on the south side of Donner Lake and somebody said the nickname for that area in the winter was "Siberia", because it spends a lot of time in the shade. I bought the suncalc app on the spot to double check -- and sure enough, they were right.
This tool does a much better job of telling the story. I wish it would've existed at the time!
Re: Show HN: 3D map of shade around the world
#70This is fucking amazing! Well done!!!!!
Looks like a good way to find great sunset spots