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I am a novice at GIS and mapping but when I got started I thought a map/tile server was the only way to build mapping webapps. But, in my admittedly simple app

I am a novice at GIS and mapping but when I got started I thought a map/tile server was the only way to build mapping webapps. But, in my admittedly simple application PMTiles can cover a lot of my visualization use cases with a thin Django app doing GEOJson for interactive layers. https://github.com/protomaps/PMTiles https://github.com/protomaps/PMTiles

Helmut10001 3y ago
Wow, thanks! I checked and PMTiles is even supported in Maplibre. [1] This can probably replace 30% of online maps with static sources. [1]: https://maplibre.org/maplibre-gl-js/docs/examples/pmtiles/ https://maplibre.org/maplibre-gl-js/docs/examples/pmtiles/
- stevage 3y ago
  The problem I found with pmtiles is not many servers support the required HTTP attributes. You need to carefully assess ahead of time.
  - cyanydeez 3y ago
    I believe it's only range requests you need supported. there's also cool sqlite querying and flatgeobufs that can do fancy lookups on large single file formats
    - stevage 3y ago
      Yeah. I don't know exactly how widely supported range requests are - my first few attempts turned up a few duds.
beeboobaa 3y ago
PMTiles is great for a static background. You can easily do a layer on top with geojson like you say, or even just by storing your own data in postgres and using postgis ST_AsMVT to turn it into a vector tile layer. Stick a cachebuster in the URL & a http cache in front and you can call it a day.
alleycat5000 3y ago
You can use pmtiles through mapserver via GDAL!
tomtomistaken 3y ago
I'm working on a map project [1] (which is a proof of concept) where you can add posts and stories by sharing the map URL on social media (mastodon.social only at the moment, we used to have a twitter listener as well). The state of the map is encoded in the URL and is added as a post when the listener catches the URL in the stream. So far you can draw shapes and unofficially add geojsons to the map. I am very excited adding the ability to link custom PMTiles in the future! [1] https://libmap.org https://libmap.org

Helmut10001 3y ago

Wow, thanks! I checked and PMTiles is even supported in Maplibre. [1] This can probably replace 30% of online maps with static sources. [1]: https://maplibre.org/maplibre-gl-js/docs/examples/pmtiles/ https://maplibre.org/maplibre-gl-js/docs/examples/pmtiles/

stevage 3y ago
The problem I found with pmtiles is not many servers support the required HTTP attributes. You need to carefully assess ahead of time.
- cyanydeez 3y ago
  I believe it's only range requests you need supported. there's also cool sqlite querying and flatgeobufs that can do fancy lookups on large single file formats
  - stevage 3y ago
    Yeah. I don't know exactly how widely supported range requests are - my first few attempts turned up a few duds.

beeboobaa 3y ago

PMTiles is great for a static background. You can easily do a layer on top with geojson like you say, or even just by storing your own data in postgres and using postgis ST_AsMVT to turn it into a vector tile layer. Stick a cachebuster in the URL & a http cache in front and you can call it a day.

alleycat5000 3y ago

You can use pmtiles through mapserver via GDAL!

tomtomistaken 3y ago

I'm working on a map project [1] (which is a proof of concept) where you can add posts and stories by sharing the map URL on social media (mastodon.social only at the moment, we used to have a twitter listener as well). The state of the map is encoded in the URL and is added as a post when the listener catches the URL in the stream. So far you can draw shapes and unofficially add geojsons to the map. I am very excited adding the ability to link custom PMTiles in the future! [1] https://libmap.org https://libmap.org