On 7/17/2021 12:20 PM, Henning Hraban Ramm wrote:
Am 17.07.2021 um 11:53 schrieb Bruce Horrocks <n...@scorecrow.com>:
On 16 Jul 2021, at 20:55, Hans Hagen <j.ha...@xs4all.nl> wrote:
On 7/15/2021 10:30 PM, Bruce Horrocks wrote:
On 15 Jul 2021, at 18:58, Hans Hagen <j.ha...@xs4all.nl> wrote:
I was wondering about that too. I admit that I looked into maps years ago but
never could find quality data files.
Does this help?
<https://www.naturalearthdata.com>
i was halfway writing as reader for that fiel format when i noticed that is is
also quite low res so i gave up on that and started playing (extending) with an
more interesting alternative that mojca and i wrote years ago at a meeting
Off the top of my head I'm not aware of any higher resolution sources of global
data - what scale were you thinking of?
Can you work with OpenStreetMap data?
https://planet.openstreetmap.org
http://download.geofabrik.de
https://download.bbbike.org/osm/
I didn’t find excerpts that only have e.g. country borders or rivers. But with
usual XML tools you could extract those.
Indeed, that is what I was referring too. Mojca found this:
https://osm-boundaries.com/
At a bachotex meeting (years ago, when the ctx group donated a nice
roadmap display to the conference) we made an openstreetmap -> metapost
style but afaik that never made it into a module. So, when I remembered
that I updated it. I can now render my hometown (need to figure out
colors) quite okay. (One can export an osm file in openstreetmap but
with some limitations on size.)
I have to play a bit more with the style before I define it useable but
the interface is liek this:
% where i live
\startMPpage
draw lmt_openstreetmap [
filename = "hasselt.osm"
grid = "dots",
] ;
\stopMPpage
% island in paris
\startMPpage
draw lmt_openstreetmap [
filename = "e:/tmp/map.osm"
] ;
\stopMPpage
The hasselt osm file is sime 12 MB, the colorful hasselt pdf file just
below 1 MB so that's okay (3.7 sec processing time on my machine so if
all claims are right sub seconds on a fast new apple).
Of course I need to make colors and what gets rendered configurable (via
the interface). It's more about the fun aspect .. no need to typeset
complete routes because that's what the web is for.
Hans
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