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First version of the style: terrain, water, roads and per-course hole colors (#7) #49

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First version of the style: terrain, water, roads and per-course hole colors (#7) #49

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aa18663
Added mapterhorn DEM tiles to golftiles.org.
HuggeK Jun 6, 2026
82c5df6
Worked some more on the style.
HuggeK Jun 8, 2026
8cb124f
Worked on the style, added processing in the lua generation script to…
HuggeK Jun 8, 2026
89a16c7
Rewrote logic to precompute course color for golf lines.
HuggeK Jun 9, 2026
bb00cbd
Fix style rendering: self-hosted glyphs and schema/style key mismatches
claude Jul 5, 2026
e96bf1f
Pin maplibre-gl to 5.24.0 and load the style relatively
claude Jul 5, 2026
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2 changes: 1 addition & 1 deletion custom-tilemaker/config.json
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@
"high_resolution": true,
"name": "Tilemaker golfTiles schema",
"version": "0.1",
"description": "Tiles for features inside of golf_courses ",
"description": "Tiles for features inside of golf_course facilities",
"compress": "gzip"
},
"metadata": {
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42 changes: 41 additions & 1 deletion custom-tilemaker/process.lua
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Expand Up @@ -121,6 +121,43 @@ local function set_AttributeInteger_or_Attribute(attributenkey, value)
end
end

local function hsl_to_rgb(h, s, l)
local c = (1 - math.abs(2*l - 1)) * s
local x = c * (1 - math.abs((h / 60) % 2 - 1))
local m = l - c/2

local r, g, b = 0, 0, 0

if h < 60 then r, g, b = c, x, 0
elseif h < 120 then r, g, b = x, c, 0
elseif h < 180 then r, g, b = 0, c, x
elseif h < 240 then r, g, b = 0, x, c
elseif h < 300 then r, g, b = x, 0, c
else r, g, b = c, 0, x end

return
math.floor((r + m) * 255),
math.floor((g + m) * 255),
math.floor((b + m) * 255)
end

-- Function to convert a name of a course into a color.
-- Requires lua 5.3 to be able to use the bitwise XOR tilde ~
local function string_to_color(str)

--Uses FNV-1a:
local hash = 2166136261 -- FNV offset basis
for i = 1, #str do
hash = hash ~ string.byte(str, i)
hash = (hash * 16777619) % 2^32
end
local hue = hash % 360 -- The hue is a value in between 0-360.
local r, g, b = hsl_to_rgb(hue, 0.65, 0.55)

return string.format("#%02x%02x%02x", r, g, b)

end


-- Nodes will only be processed if one of these keys is present. This reduces memory drastically as stated by the documentation.
node_keys = { "golf", "tee", "natural", "leaf_cycle", "leaf_type", "information", "amenity", "vending",
Expand Down Expand Up @@ -396,6 +433,9 @@ function way_function()
-- Still sets the course info from the golf=holes even if no route=golf tags is present.
if golf_course_name ~= "" and not set_golf_course_name then
Attribute("golf:course:name", golf_course_name) -- Name of the course this hole belongs to.

Attribute("course_name_color", string_to_color(golf_course_name))
-- the Maplibre GL style to use for golf=hole lines and other coloring to to lack of proper scripting support in the style itself.
end
if golf_course ~= "" and not set_golf_course then
Attribute("golf:course", golf_course)
Expand Down Expand Up @@ -539,7 +579,7 @@ function way_function()

-- Rivers
local waterway = Find("waterway")
if waterway == "stream" or waterway == "river" or waterway == "canal" then -- Is this to restrictive? Maybe more?
if waterway ~= "" then
Layer("golf_lines", false)
Attribute("waterway", waterway)
-- "General" common "extra" attributes between nodes & ways/areas:
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24 changes: 20 additions & 4 deletions index.html
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Expand Up @@ -6,9 +6,9 @@
<meta name="description" content="Free and open-source golf centric vector tiles with custom style for websites and apps, using OpenStreetMap data">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Maplibre stylesheet: -->
<link href="https://unpkg.com/maplibre-gl/dist/maplibre-gl.css" rel="stylesheet" />
<link href="https://unpkg.com/maplibre-gl@5.24.0/dist/maplibre-gl.css" rel="stylesheet" />
<!-- Scripts: -->
<script src="https://unpkg.com/maplibre-gl/dist/maplibre-gl.js"></script>
<script src="https://unpkg.com/maplibre-gl@5.24.0/dist/maplibre-gl.js"></script>
<script src="https://unpkg.com/pmtiles@3.2.0/dist/pmtiles.js"></script>
</head>
<body>
Expand Down Expand Up @@ -44,10 +44,26 @@ <h2>Initial Demo using Maplibre GL JS over Sweden, finland and Denmark: </h2>
p.getHeader().then(h => {
const map = new maplibregl.Map({
container: 'map',
zoom: h.maxZoom - 2, // golfTiles is rendered at max zoom of 14.
zoom: h.maxZoom - 1, // golfTiles is rendered at max zoom of 14.
center: [15.59411, 56.52839], //Centers on Emmaboda GK.
style: 'https://golftiles.org/styles/golfTilesStyle.json'
pitch: 70,
style: 'styles/golfTilesStyle.json', // relative: resolves to golftiles.org in production and to the local copy when serving the repo root during development.
maxPitch: 85
});
map.addControl(
new maplibregl.NavigationControl({
visualizePitch: true,
showZoom: true,
showCompass: true
})
);

map.addControl(
new maplibregl.TerrainControl({
source: 'terrainSource',
exaggeration: 1
})
);
});
</script>

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