MapCSS viewer online

Help and support
, ,
1

I want to do some testing with MapCSS styles without firing JOSM for the job. Instead, I want an app (ideally web app) which accepts .osm and .mapcss files as input and, ideally, has a live preview of style changes plus an ability to edit the data. Essentially, I am looking for a MapCSS equivalent of Kosmtik.

If that’s not an option, I am ready to instead install Kosmtik and experiment around with openstreetmap-carto and osm-carto-alternative-colors. In this case, I want:

  • Kosmtik installation instructions for macOS Monterey (12) on Apple M1
    • Performance is important: does Kosmtik run faster in Chrome than Firefox? If yes, I’ll install Ungoogled Chromium as secondary browser.
  • comparison with TileMill (which I have already installed)
    • Is it any good for CartoCSS editing? All the openstreetmap-carto folks seem to use Kosmtik, not TileMill – please explain why.
    • With TileMill, I noticed it severely hogging my performance (with the app open in Firefox) even while nothing is rendered (it is RAM-heavy and my Mac only has 8 GB).
1 Like
2

As of writing this, I already know for many months that Kosmtik is generally preferred over TileMill for CartoCSS style development (such as osm-carto) – according to the article Systematic Testing in Map Design on the Imagico Blog, TileMill was used “in the early days” of map style design.

If I gain some interest in my own map style development in the future, I might try out Kosmtik.