[HN Gopher] 3D map of the Czech Republic, made from 12.5cm/px im...
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3D map of the Czech Republic, made from 12.5cm/px imagery (2017)
Author : Toutouxc
Score : 271 points
Date : 2022-11-06 12:02 UTC (10 hours ago)
(HTM) web link (mapy.cz)
(TXT) w3m dump (mapy.cz)
| 101008 wrote:
| Awesome - since I was a kid I always dreamt with something like
| this but for the cities I know, because I thought that would make
| it easy for videogames to use them to set stories. Playing GTA
| (or other videogames) on my own city would be an incredible
| experience.
| Toutouxc wrote:
| 3D map of my home country made available by our local map
| provider Mapy.cz (those guys rock).
|
| Some more info:
| https://www.melowntech.com/post/2017/08/11/mapycz-country-wi...
| yread wrote:
| my only gripe with mapy.cz is that it's difficult to figure out
| the altitude of a place. You have to count the contour lines
| which can get tricky. Id love m seeing it (next to wgs84) when i
| long tap a location on a map
| TDiblik wrote:
| I like to use mapy.cz when looking at czech republic, because
| they're veeery recent. Only problem I have with them, is that
| they are intentionally uncompatible with leaflet. They have their
| own api/map library and for some reason prohibit usage with other
| map libraries, because (as per their docs, api.mapy.cz) they
| believe that accessing their maps directlly is some kind of
| abuse? Other than that, it's a good product.
| Toutouxc wrote:
| Some places to see:
|
| - Rattay from Kingdom Come: Deliverance:
| https://en.mapy.cz/zakladni?m3d=1&height=399&yaw=57&pitch=-2...
|
| - ArmA II / DayZ map (hovering above Chernogorsk):
| https://en.mapy.cz/zakladni?m3d=1&height=3369&yaw=-14&pitch=...
|
| - Church moved by 841 meters in 1975, artificial lake (ex-coal
| mine) opened in 2020:
| https://en.mapy.cz/zakladni?m3d=1&height=303&yaw=-16&pitch=-...
|
| - Military training area, Doupov mountains:
| https://en.mapy.cz/zakladni?m3d=1&height=1582&yaw=-75&pitch=...
|
| - Pumped-storage reservoir, Dlouhe Strane:
| https://en.mapy.cz/zakladni?m3d=1&height=1337&yaw=-177&pitch...
| statico wrote:
| Here's a video contrasting the ArmA/DayZ Cherno map versus
| drone footage of the real place:
| https://www.youtube.com/watch?v=VLhCNEpcPO4
|
| I'm completely lost without driving directions these days. But
| after accruing a few hundred hours in ArmA and DayZ, if you
| dropped me in or north of Usti nad Labem, I could get around no
| problem.
| 0x138d5 wrote:
| Also:
|
| - Livonia, ARMA III: Contact:
| https://en.mapy.cz/zakladni?m3d=1&height=4952&yaw=-27&pitch=...
| joannabs wrote:
| joannabs wrote:
| joannabs wrote:
| joannabs wrote:
| joannabs wrote:
| andrewshadura wrote:
| Tatra mountains:
| https://en.mapy.cz/zakladni?m3d=1&height=2926&yaw=15&pitch=-...
| zokier wrote:
| Anyone with MSFS, how does its terrain compare? Both are based on
| conceptually similar tech?
| ponyous wrote:
| Didn't play for some time but pretty similar. MSFS spawns
| individual meshes for trees/buildings when you get closer so
| still a bit better imo, but keep in mind in game you are always
| pretty high so they didn't focus on first person view details.
| dividuum wrote:
| The raw terrain texture and height data is probably a bit lower
| res in most cases. Some places have photogrammetry, in which
| case it looks pretty good and looks similar. Outside those
| areas, which is limited to mostly major cities, any structure
| you see is auto-generated using some AI algorithm. It looks at
| the satellite images, open street map metadata and more and
| guesses what kind of structure matches best. Cities generated
| that way look ok, unless you fly too close :)
| ChrisMarshallNY wrote:
| That's cool!
|
| However, this road looks like it might give a rough ride:
| https://en.mapy.cz/zakladni?m3d=1&height=138&yaw=234&pitch=-...
| ralusek wrote:
| This is a very pleasant 3d space to navigate on mobile. I was
| intuitively able to pan, zoom, rotate about the vertical axis as
| well as tilt. Put two fingers on the screen and move them
| vertically to tilt, move them tangent to the original contact
| center point of the place between two fingers to rotate, pinch
| them to zoom.
| wwilim wrote:
| It also has a route planner which can plan a walk around a given
| spot that takes roughly the specified time or is roughly the
| specified distance
| dvh wrote:
| And the practical application of data like these:
| https://prehrada.hrach.eu/en.html
| imhoguy wrote:
| Reminds me "Ocean of Dreams" meme map
| https://imgur.com/gallery/Hkr5jgW
| fifilura wrote:
| And the more sinister application of this kind of map is for
| programming optimal paths for cruise missiles.
|
| This, however, makes it easier to get funding. If you want
| money, create military, banking or casino/betting applications.
| kfajdsl wrote:
| Wouldn't this put Prague underwater?
| hoseja wrote:
| That's one of the main benefits.
| B1FF_PSUVM wrote:
| also
|
| > only a relatively small levee is needed.
|
| facing towards Germany, if those small red lines are it.
| Bud wrote:
| Markoff wrote:
| let me guess it's proposed by someone from Brno
| glogla wrote:
| I see Jenda being Jenda.
| mks wrote:
| This site is quintessential Czech humor, similar in spirit to
| recent Kralovec annexation and Jara Cimrman. Thank you for
| linking it here.
| sorenjan wrote:
| This looks very useful and would bring electricity prices way
| down. The best time to start building would have been years
| ago, the second best is today!
| yojo wrote:
| I assume you're joking, but in case you're not - the plan
| would put the capital city (Prague/Praha) under 200m of
| water.
| [deleted]
| googlryas wrote:
| We just need to float it. A new Venice of the North. Take
| that, Amsterdam!
| sorenjan wrote:
| Yes, but 2 PWh clean energy though. Great for economic
| growth, and the new lake would be good for leisure and
| tourism.
| TheRealPomax wrote:
| Might be cool, won't know, because of that full page "we are
| tracking you, do you consent, or do you want to go through a
| click adventure that'll probably take half an hour before we
| pretend that analytics and tracking cookies are essential site
| functionality and we refuse to give you the option to turn those
| off" notice.
|
| If you can't write your site code to do the right thing when DNT
| is turned on and without needing sessions to serve restful data,
| your site isn't done, and your code has bugs that need fixing.
| BossingAround wrote:
| You can open it in the incognito mode, consent to all, and then
| let the browser delete everything upon closing the window.
| [deleted]
| adenozine wrote:
| Or just don't use it?
|
| These sorts of comments always ignore the bidirectional
| relationship between websites and web users. They don't owe you
| anything, you're just another customer with a choice to make.
| TheRealPomax wrote:
| Yes, that's implicit to the complaint: "too much tracking and
| profiling being requested: won't use." And then you post a
| comment letting others know, in the hopes that they do better
| on their own websites because they see people voice the fact
| that they'll bounce on unreasonable tracking modals.
|
| They don't owe me anything, I don't owe them anything, and
| when someone with whom we have no debt relationship one way
| or the other goes "give me your personal data or I won't show
| you anything, not even a preview to justify handing over your
| data" should be called out as making an unreasonable request
| before, as you suggest, moving on.
| adenozine wrote:
| I suppose I could understand this complaint more if this
| was an unusual sight to behold, but surely you see this
| pattern a million times a day like the rest of society?
|
| I guess it just seems like it's a little overly pedantic,
| like those people that insist every intersection be
| replaced with a roundabout because it's more efficient for
| traffic. It misses the point.
|
| I think the law requiring websites to show the stupid
| things at every turn was a bad one. It should have been
| required of browsers to come up with some kind of one-time-
| per-user configuration standard of data collection and just
| be done with it. To me, that's better to do it once or
| twice per computer or whatever the case is, than with every
| little single-purpose website that someone browses to.
|
| Anyhow, I misread your original complaint anyways, I
| should've read more carefully before typing. That's my
| mistake.
| UltraViolence wrote:
| Awesome. Breathtaking.
|
| But the imagery isn't from satellite data, is it? Must be from
| airplanes.
| lucgommans wrote:
| Indeed, something like 25cm or better is typically shot from
| airplanes. I don't remember what the physical limit is for
| image quality given a reasonably sized spy satellite (iirc it's
| around the 20cm mark), but commercially at least, the high
| quality imagery is all airplanes. Governments often commission
| such planes to fly ~yearly at something like 10 cm, as well as
| commissioning height maps[1], but the very good stuff is not
| released to the public for privacy reasons. I think the best
| I've ever seen is 15cm.
|
| The point clouds from those height maps alone, though, I
| already find to be quite interesting/revealing. You can see the
| contours of e.g. a tree exactly, even without having any
| imagery laid onto them: https://snipboard.io/tPsRBo.jpg
|
| [1] For those that can read Dutch, how the Actueel
| Hoogtebestand Nederland is made: https://www.ahn.nl/ahn-the-
| making-of
| iwillbenice wrote:
| vetinari wrote:
| > but the very good stuff is not released to the public for
| privacy reasons.
|
| You can buy the data, the agencies responsible for these data
| make some decent coin. Yes, they are expensive to obtain, but
| that is paid by taxpayers anyways, so it is kind of double
| dipping.
|
| The entire area of Czech republic is available at 0,2-0,125 m
| per pixel for around ~100k EUR. Not unattainable for those
| who need it, but not hobbyist price either. For the
| neighboring Slovak republic, the ortophoto at 0,2 m per pixel
| is available for free.
| blacha wrote:
| New Zealand regularly uses flying companies to take aerial
| imagery photos of most of the country, which is generally
| taken between 30cm and ~2cm, Land Information New Zealand
| (LINZ) then releases this imagery imagery completely free
| (CC-BY)[1,2] to the public and can be downloaded as GeoTIFFs
| [3]
|
| I think LINZ decided that <0.05m might have some privacy
| issues due to being able to distinguish people in it, and
| have held back releasing some <0.05m or they may have reduced
| the quality of it.
|
| disclaimer: I work at Land Information New Zealand
|
| [1] https://basemaps.linz.govt.nz/?i=hawkes-bay-
| urban-2022-0.05m... [2]
| https://basemaps.linz.govt.nz/?i=christchurch-
| urban-2021-0.0... [3] https://data.linz.govt.nz/layer/106915-
| christchurch-005m-urb...
| isoprophlex wrote:
| Doesn't PDOK provide 8 cm resolution photos of The
| Netherlands?
| lucgommans wrote:
| Recently at an OSM meetup with the local government in
| Aachen (Germany), they mentioned that some imagery they
| shot was deemed too invasive and only used internally. I
| thought that was 10cm, but now checking what is available,
| looks like I was wrong! Probably it was 5-7cm then? Or
| maybe this was rather about the imagery available from
| different angles, so you can see into gardens from
| different directions?
|
| In iD I see that indeed the PDOK imagery is now labeled
| 7.5cm, but checking that against the Belgian and German
| 10cm:
|
| PDOK 7.5cm: https://snipboard.io/fbWqYM.jpg
|
| AIV Flanders 10cm: https://snipboard.io/Ahn4lJ.jpg
|
| NRW (Germany) 10cm: https://snipboard.io/RpT3vA.jpg
|
| PDOK's looks awful, much worse than 10. Maybe some regions
| are available in a higher resolution?
| timeon wrote:
| I guess the geometry is also from lidar/airplanes. As example
| case in Slovakia:
| https://zbgis.skgeodesy.sk/mkzbgis/en/teren?pos=48.262614,17...
| aaronharnly wrote:
| Very cool map, but wow that is a lot of advertising cookies to
| individually choose!
| ssl232 wrote:
| Didn't see any, which I assume is due to my use of the Easylist
| Annoyances list in uBO. In my experience it blocks most cookie
| popups.
| yreg wrote:
| Mapy.cz are very good outside of Czech Republic as well.
| Jamie9912 wrote:
| I was wondering why it kept working as I passed the German
| border
| Daniel_sk wrote:
| Perfect for offline hiking maps in Slovakia. Google Maps are
| basically unusable outside of car roads.
| andrewshadura wrote:
| Not for offline (unless you pre-cache), but
| https://Freemap.sk (which is also OSM-based) is even better
| for online use.
| inglor_cz wrote:
| I prefer them to Google Maps. I even like the look better.
| sorenjan wrote:
| They're probably my favorite OSM map style, especially the
| outdoor variant.
| lucgommans wrote:
| Impression for those that don't want to wait for the application
| to load: https://lucgommans.nl/tmp/prague3d.html (5MB, 10s mp4 of
| a square in Prague)
|
| A bit choppy because of the basically nonexistent GPU, and I just
| made it with xdotool (moving the mouse straight/consistently)
| while recording the screen, but I'm quite impressed with the
| level of detail of this 3d map!
| pedalpete wrote:
| This is pretty good, though tile loading needs some work.
|
| I'm the founder of Ayvri, and we did some work with in the
| Carpathian Mountains (Romania, but they also cross into Czech).
| https://ayvri.com/scene/7ykxgdzoj9/xkol16r7k4
| sanguy wrote:
| Nice!
| the_only_law wrote:
| This is actually really cool. Is the data used public? I can
| imagine some pretty cool game concepts using such detailed real
| world data.
| gus_massa wrote:
| Nice! (Note: It takes forever to load, but it's worth the wait.)
|
| The not yet loaded tiles give a interesting "thirteen floor"
| effect :)
|
| I found a glitch https://imgur.com/a/6Oh3AQn
| https://en.mapy.cz/zakladni?m3d=1&height=1100&yaw=234&pitch=...
| It looks like a quarry. Is the wall too vertical just in the
| border between tiles? Did they dug that part just between photos?
| tomas789 wrote:
| Yes, it is owned by a company I work for. It is an open pit
| coal mine. Not a glitch.
| gus_massa wrote:
| The glitch is a small very black thing under the arrow in my
| screenshot. It looks like a rotated "P". If you move, it's a
| hole and you can see the map under the image through it.
| s1k3s wrote:
| Doesn't work in Firefox.
| BossingAround wrote:
| It does work on Firefox for me (on macOS at least)
| Tajnymag wrote:
| It does.
| photochemsyn wrote:
| Why don't map sites ever publish 3D as topo lines overlaid on a
| flat 2D map? It's computationally much cheaper, and it's not too
| hard to learn to read a topo map, as long as the elevations are
| printed in a reasonably dense manner.
| jeffalyanak wrote:
| Why sacrifice accessibility and usability to save on a bit of
| computation?
| jeffalyanak wrote:
| Don't get me wrong, I think it would be super cool to _also_
| include a topographical map feature for those who
| wanted/needed it, but I don't expect most people would be
| able to use it in lieu of a simple, visual 3D view.
| asutekku wrote:
| Because for a layperson, an actual 3D map is much easier (and
| prettier) to read than a topo line map.
| torstenvl wrote:
| Literally none of these are "actual 3D maps," they _are_ topo
| maps. The only additional information they provide is the 3D
| extension of objects that were already discoverable in 2D.
|
| "Can this map help me find the town hall of Whittier,
| Alaska?" If not, it isn't a 3D map.
| infinityio wrote:
| > Can this map help me find the town hall of Whittier,
| Alaska?
|
| For those who (like me) who didn't get the reference and
| were curious about this - the town appears to be mainly
| consolidated into a single 14-story building [0]
|
| [0] https://en.wikipedia.org/wiki/Begich_Towers
| hoseja wrote:
| Protip: open the hiking layer.
| c7DJTLrn wrote:
| Very nice. Now I can look at Prague and think about how much I
| miss it :) went in April and had such a great time.
| cycrutchfield wrote:
| It's missing Kralovec
| smcl wrote:
| For the non-Czechs: this is a running joke about Kaliningrad
| electing to be annexed by Czech Republic after the occupied
| territories in Ukraine "voted" to join Russia.
|
| There were a bunch of memes and tweets going around, adverts
| for holidaying by the Czech seaside, or joining the new Czech
| Navy to serve aboard the aircraft carrier "Karel Gott". A few
| companies played along, it was actually pretty funny :)
| folli wrote:
| Very nice! Obligatory and shameless self promotion everytime the
| topic of 3D maps comes up:
|
| I recently created a web app to visualize GPS tracking files in a
| 3D terrain. You can upload your GPX or FIT files and it generates
| the 3D Terrain using Babylon.js
|
| It's called https://cubetrek.com
| sytelus wrote:
| Is there anyway to get such track or map from Apple Fitness?
| folli wrote:
| I don't use Apple Fitness, but I assume there's a way to
| export GPX files?
| reaperducer wrote:
| _I recently created a web app to visualize GPS tracking files_
|
| Off topic, but since you work with GPS tracking files, perhaps
| you can recommend a GPS tracking device for me.
|
| Until last year, I used one I got around 2005 that was about
| half the size of a pack of cigarettes. You turned it on, and it
| would start logging waypoints at 10 minute intervals to a
| standard text tracking file on a microSD card. I could unload
| that text file into my computer and plot the route on a map in
| a bunch of mapping applications.
|
| It was great because when I was going on an adventure off the
| grid, or traveling overseas or something, I'd clip it to my
| backpack and then when I got home look at all the fun places
| I'd been.
|
| I recently tried to find a replacement on Amazon, and nothing
| is suitable. They are all:
|
| - Built with a big magnet for clamping to the underside a car
|
| - Just a stripped-down Android phone, so large, fragile, and
| complicated
|
| - Require a subscription
|
| - Require cellular connectivity
|
| - A watch
|
| - A piece of software
|
| I don't want connected. I don't want to subscribe to anything.
| I don't want it to drain my phone's battery. I don't want to
| stalk my ex-girlfriend.
|
| I just want something simple that I can turn on and turn off. I
| know it's possible, because I had one. I just want to find
| another one.
| folli wrote:
| I personally use a Garmin Fenix (an old one, Fenix 3). The
| watch form factor is perfect for my use cases (mainly hiking,
| running and ski mountaineering).
|
| Also: the barometric altimeter is a must have for
| mountaineering purposes.
|
| I guess it very much depends on what you need it for.
| habi wrote:
| What a blast for the past! I still have a functioning Wintec
| GPS tracker which I bought in 2007. One battery lasts for
| some days, I have multiple batteries... It's barely larger
| than a pack of matches. Currently they sell This model here
| https://www.win-tec.com.tw/portfolio-item/wbt202/, I have a
| WBT200.
| reaperducer wrote:
| This is very much like the one I want to replace.
| Unfortunately, it's not available for retail purchase
| anymore.
| habi wrote:
| True, sorry. I just looked at the site on my mobile. Also
| no luck on eBay for me...
|
| If my memory serves me good, then a
| https://www.amazon.com/i-gotU-GT-120-Travel-Logger-
| Software/... should also do the trick.
| baggsie wrote:
| Garmin Etrex.
| reaperducer wrote:
| Discontinued, according to https://www.garmin.com/en-
| US/p/6403
|
| The only available Garmin alternative is $200. The one I'm
| replacing was $30. But I'm willing to go to $75.
|
| Also, it's a bit large because it has a screen, but that's
| not a deal-breaker.
|
| The one I'm replacing didn't even have a screen, just a
| light for power and a light to indicate it was connected to
| the satellites.
| frant-hartm wrote:
| There is a newer model eTrex 10.
|
| https://www.garmin.com/en-US/p/87768
|
| I have it, it does the job well. It can store about 14
| days of walking, the 25 hour battery life is accurate, it
| can do more with good batteries (uses 2 AA) and if you
| reduce the recording interval.
|
| The map is rubbish, I deleted it to get more data for the
| exported tracks, which you can download to any computer
| with a USB cable, no special driver needed. Unfortunately
| it doesn't have a card slot.
|
| The great thing for hiking is it supports just about any
| coordinate system you can think of (at least supports all
| that I know).
| usrusr wrote:
| Watches appear on the reject list, but fail to match any of
| your explanations. If it's about not wanting something on
| your wrist, just replace the strap with one that is good for
| clipping to your backpack. Most of the cheaper Garmin don't
| offer an option to lower recording frequency for extreme
| battery runtimes, but the Instinct series should do that just
| fine.
| 2Gkashmiri wrote:
| like,mind=blown.
|
| i was on a trek last month and was following a trail from a gpx
| file. there was no other guide with us so i had to constantly
| keep the phone on, try to be on the dotted line and more often
| i would divert to one side and had going up, we diverted a lot,
| had to face trouble being rimrocked more than once.
|
| one, i felt like a need for voice navigation on OSM for hiking,
| just a simple "you have diverted from track, move to right 10
| meters to be back on track" followed by "you are on track".
|
| then i felt like the app should have 3d elevation data WITH the
| gpx track so that i can look at the phone, see the contour and
| look up at the rock and cross reference. This is 100% what i
| wanted.
|
| 1. is this open source ? 2. can this be added to some hiking
| app or even to osmand? 3. i tried to add a gpx track and got
| "Track does not contain Timing data.". if the file does not
| have that data, why not ignore all that and just show the
| visualization?
| folli wrote:
| Thanks for checking it out.
|
| No, it's not open source yet. I don't yet know where to go
| with this and if there's enough interest to continue
| development. I'm currently working on having accounts, so
| users can upload their tracks to their own profile. Also,
| integration with Garmin Connect is almost finished (so Garmin
| tracks will be automatically synced to your profile). Sign up
| to the newsletter if you want to keep in touch (or write me
| an email).
|
| Regarding 3.: It only works for GPX files with timing data
| (i.e. from a n actual activity) in order to show speed etc.
| But this is the most requested feature so far, so I'll work
| on it...
| matsemann wrote:
| Very cool! But when trying stuff like this I'm always reminded
| how flat things look at scale, hah. Like my bike ride to work
| the other day: https://cubetrek.com/view/8197 200m of elevation
| from kilometer 25 to kilometer 31, but hard to grasp how steep
| some of those hills are, haha.
|
| But for hiking mountainsides, or where I specifically bike up
| steep hills it looks really great
| https://cubetrek.com/view/8203
| folli wrote:
| I completely agree. To let you in on a little secret: the
| hills/mountains are already exaggarated by a factor of 1.5 to
| make them stand out more. So reality is even more flat.
|
| The tracks are definitely more impressive on mountaineous
| terrains (see some of the examples on the homepage), for flat
| terrain a traditional 2D map is more helpful.
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(page generated 2022-11-06 23:00 UTC)