Map people, I need your help! What projection might have been used to create this map? Note how the meridian have a distinct bend in them at around 80 degrees north.
| Joined | 10. nov. 2022 |
| Website | https://evers.dev |
Kristian Evers
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Pretend geodesist. Sailboat racer and instructor. Mediocre software developer. Occasional tent sleeper. Amateur photographer. Also chair of PROJ.org and head of function at the Danish national mapping agency but who gives a ...
Here's a new version with tweaked projection parameters and an attempt at mitigating the vast difference in size between smallest and largest country. Is it clear to you what's going on?
This is as close I get to recreating the map. Azimuthal Equidistant projection centered on 55°N, 5°W.
For the perfect map of the Danish Realm I think the projection center needs fine tuning, but this is a good starting point.
@jjimenezshaw @pinakographos how did QGIS make that globe flat? 😉
@adamsteer thanks, that's a good suggestion. I'll see if can make one that's similar using near-sided perspective.
You might be right that it's an artifact. Wikipedia has a very similar map, although showing an entire hemisphere, which does seem to have the same bend: https://upload.wikimedia.org/wikipedia/commons/1/10/Kingdom_of_Denmark_%28orthographic_projection%29.svg
From the file name we can learn that it is an orthographic projection in that case :-)
Javier Jimenez ShawPROJ 9.8.0 was released on March 2nd 🥳
More info on https://proj.org/en/9.8/news.html
As a significant change in EPSG, ETRS89 datum ensemble now has 57 members. Most of them are realizations from European countries.
https://spatialreference.org/ and
https://crs-explorer.proj.org/ are already up to date.
@nyalld it's disappointingly boring
@sgillies yup, absolute 💩 They should ditch the current implementation and refocus it on route creation instead. It would actually be useful to be able to give a prompt like "hilly trail run, about 15 km round trip starting from my house" or whatever and have it create a nice route based of the heatmaps and stuff. I'd be all over that!
*PROJ in the browser*
Finally, after a long time and learning a lot in the process, I am getting a webpage that uses PROJ to perform coordinate transformations (similar to cs2cs)
https://jjimenezshaw.github.io/wasm-proj/transform.html
Best features:
- fast!
- it uses grid files when needed, downloading only the needed part of them.
There's another one that replicates projinfo:
https://jjimenezshaw.github.io/wasm-proj/projinfo.html
It has its js library behind it. I'm still developing it, improving it & adding more features.
Enjoy!