[HN Gopher] 3D map of the Czech Republic, made from 12.5cm/px im... ___________________________________________________________________ 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. ___________________________________________________________________ (page generated 2022-11-06 23:00 UTC)