Re: [NTG-context] mp-geo Metapost package with ConTeXt

Am 17.07.2021 um 20:50 schrieb Hans Hagen :

On 7/17/2021 2:42 PM, Arthur Rosendahl wrote:

...

On Sat, Jul 17, 2021 at 12:53:33PM +0200, Hans Hagen wrote:

...

Just as an example, the context meeting is att the attached location:

50°45’7” / 5°35’19”

https://www.openstreetmap.org/export#map=18/50.75175/5.58883 If you want official data you can try the Belgian cadastre: https://data.gov.be/en/dataset/tt098dcb-f5c7-49b8-8e0b-7c3811630d85 :-) Yet another format? No way. I managed to go big so for instance the area where the colorado user group is located:

https://www.openstreetmap.org/export#map=12/40.5117/-104.9496

produces a 122 MB osm file

https://overpass-api.de/api/map?bbox=-105.1817,40.4096,-104.9493,40.6272

that gets turned into a 15 MB metapost file that becomes an 8.7 MB pdf file. Unfortunately it takes 36 seconds to be produced (9 seconds xml loading, 17 seconds map processing, 3 seconds mp -- which is not that bad -- and some 2.56 seconds pdf production) plus some 3 GB memory but that's still under my limit. Maybe a decent modern desktop can do it in half that time, who knows.

Of course the rather detailed colorfull image is a challenge for the pdf viewer but (sumatra) it manages and one can then zoom in a lot. I tried the whole of slovenia to prove myself to mojca but overran my quota for that api (and I'm not in the mood to install all kind of stuff here).

I downloaded a few countries for you: https://sedna.fiee.net/d/328d53f6a3e04b23aee2/ Hraban