Lack of earth layer

[pkaminski2108]

I'd like to add an 'earth' layer (similar to what is done here: https://protomaps.github.io/PMTiles/?url=https%3A%2F%2Fr2-public.protomaps.com%2Fprotomaps-sample-datasets%2Fprotomaps-basemap-opensource-20230408.pmtiles#map=0.52/0/0).

However, after adding this item to config.json
"earth": { "minzoom": 0, "maxzoom": 14 },

and adding this to process.lua

local earth = node:Find("earth") 
if earth ~= "" then 
  node:Layer("earth", false) 
  node:Attribute("class", earth) 
  SetNameAttributes(node) 
  return 
end

The 'earth' layer is empty - could someone help me with this?

I am not uploading the entire files because I am based on ./resources/config-openmaptiles.json and /resources/process-openmaptiles.lua.

[systemed]

Your code will look for nodes in the source OSM data with an "earth" tag, and write them out to your vector tiles. That's probably not going to work - nodes tagged as "earth" are not a thing in OSM.

To add a new layer, generally you'll need to identify your source data (which may be something tagged in OSM or external shapefiles), then write the Lua script to recognise this and write out vector data accordingly. I'm not sure what the Protomaps earth layer contains but that should be your starting point.

[pkaminski2108]

So @systemed I wonder what I did wrong there (image below)? I thought I was missing the earth layer because in this example LINK the earth layer (maybe it's just a name) is present and the countries and their borders are visible

[systemed]

What are you expecting to see in the Earth layer?

[pkaminski2108]

If you look at the example to which I provided the link, you can see the country borders + the background of the countries stands out on the map (it has a different color). You can't see it on my screenshot - the background of the countries blends with the oceans. I thought this was what the earth layer is responsible for

[systemed]

If you create a map with tilemaker using the default (OpenMapTiles-compatible) schema, and the default style, country boundaries are included.

You don't appear to have the ocean layer in your map - possibly you haven't included the water shapefiles as described in the readme?

[BenOnTrack]

Hi @pkaminski2108 , have you found a decent setting for
"ocean": { "minzoom": 0, "maxzoom": 14, "source": "coastline/water_polygons.shp", "simplify_below": 13, "simplify_level": 0.0001, "simplify_ratio": 2, "write_to": "water", "index": true }

When I run that current setting (from config-openmaptiles), on a small country (NZ) i end up with a 5gb mbtiles.

[BenOnTrack]

aw actually it looks like this config has changed since my last pull - going to try with the new config
"ocean": { "minzoom": 0, "maxzoom": 14, "source": "coastline/water_polygons.shp", "filter_below": 12, "filter_area": 0.5, "simplify_below": 13, "simplify_level": 0.0001, "simplify_ratio": 2, "write_to": "water" },

Edit: still 5Gb