generated by DALL-E
chii-tiler: "tiny" in Japanese is "chiisai", shorten into "chii"
- In this type of server, there is a de-facto - maptiler/tileserver-gl, but this is too big for me.
- I want a server accept style.json-url and respond raster tile, inspired by developmentseed/titiler
chiitiler provides you with /tiles raster-tile endpoint. Once server launched, you can use like this:
http://localhost:3000/tiles/0/0/0.png?url=https://tile.openstreetmap.jp/styles/osm-bright/style.json
http://localhost:3000/tiles/0/0/0.webp?margin=100&url=https://tile.openstreetmap.jp/styles/maptiler-toner-en/style.json
http://localhost:3000/tiles/1/1/1.jpg?tileSize=256&quality=80&url=https://tile.openstreetmap.jp/styles/osm-bright/style.json
chiitiler provides you with /clip.png|webp|jpg|jpeg endpoint. Once server launched, you can use like this:
# default size is 1024, this is longer axis and shorter axis is calculated by aspect ratio
http://localhost:3000/clip.png?bbox=100,30,150,60&url=https://path/to/style.json
# specify size
http://localhost:3000/clip.png?bbox=100,30,150,6&size=512&url=https://path/to/style.json
# specify quality
http://localhost:3000/clip.png?bbox=100,30,150,6&size=512&quality=80&url=https://path/to/style.json
Each endpoint also supports POST method. You can pass style.json as a body. (then, url parameter is not needed)
graph LR
subgraph sources
direction LR
A[style.json]
z/x/y.pbf
z/x/y.png/webp/jpg
sprite
glyphs
end
subgraph chiitiler
cache
render
server
end
sources --> cache --> render --> server --/tiles/z/x/y--> png/webp/jpg
cache <--get/set--> memory/file/S3
docker pull ghcr.io/kanahiro/chiitiler
docker run -p 3000:3000 ghcr.io/kanahiro/chiitiler # -> tile-server
# recommended: you can use environment variables
docker run -p 3000:3000 -d \
-e CHIITILER_CACHE_METHOD=s3 \
-e CHIITILER_S3CACHE_BUCKET=bucketname \
-e CHIITILER_S3_REGION=ap-northeast-1 \
ghcr.io/kanahiro/chiitiler
# you also can pass options
docker run -p 8000:8000 ghcr.io/kanahiro/chiitiler tile-server -p 8000 -c s3 -s3b bucketname -s3r ap-northeast-1you can pass server options via environment variables
| env var | default | description |
|---|---|---|
| CHIITILER_PORT | 3000 | port number |
| CHIITILER_PROCESSES | 1 | num of chiitiler processes. 0 means all-CPUs |
| CHIITILER_DEBUG | false | debug mode |
| CHIITILER_STREAM_MODE | false | stream mode |
| CHIITILER_CACHE_METHOD | none | cache method, none, memory, file or s3 |
| CHIITILER_CACHE_TTL_SEC | 3600 | cache ttl, effect to memory and file |
| CHIITILER_MEMORYCACHE_MAXITEMCOUNT | 1000 | max items for memorycache |
| CHIITILER_FILECACHE_DIR | .cache | filecache directory |
| CHIITILER_S3CACHE_BUCKET | s3cache bucket name | |
| CHIITILER_S3_REGION | us-east1 | s3 bucket region for caching/fetching |
| CHIITILER_S3_ENDPOINT | s3 endpoint for caching/fetching | |
| CHIITILER_S3_FORCE_PATH_STYLE | false | force path style for s3, needed for minio |
- Node.js v18 or v20
npm install
npm run build
node dist/main.js tile-server
# running server: http://localhost:3000
# develop
npm run dev
# running server: http://localhost:3000
# debug page: http://localhost:3000/debugnode dist/main.js tile-server -p 8000 -c file -ctl 60 -fcd cachedir -D
# -p: port number
# -c: cache method
# -ctl: cache ttl
# -fcd: cache directory
# -D: debug mode
node dist/main.js tile-server -c memory -ctl 60 -mci 1000
# -mci: max cache items
node dist/main.js tile-server -c s3 -s3b chiitiler -s3r ap-northeast-1
# -s3b: S3 bucket name for cache
# -s3r: S3 bucket region
# caution: TTL is not supported in S3 cache, please utilize S3 lifecycle policy- in debug mode, you can access debug page: http://localhost:3000/debug
- You can pass style.json url:
http://orhttps://protocol are used in Style Specification- In addition, chiitiler supports following protocols:
s3://for S3 bucketfile://for local filembtiles://for local MBTIles filespmtiles://form PMTiles, remote or local or s3
- Only when
http://andhttps://chiitiler will cache them with a specified method.
{
"version": "8",
"sources": {
"dir": {
"type": "vector",
"tiles": [
"file://localdata/tiles/{z}/{x}/{y}.pbf"
],
"maxzoom": 6
},
"mbtiles": {
"type": "vector",
"tiles": [
"mbtiles://localdata/school.mbtiles/{z}/{x}/{y}"
],
"maxzoom": 10
},
"pmtiles": {
"type": "vector",
"tiles": [
"pmtiles://localdata/school.pmtiles/{z}/{x}/{y}"
],
"maxzoom": 10
},
"s3": {
"type": "vector",
"tiles": [
"s3://tiles/{z}/{x}/{y}.pbf"
],
"maxzoom": 6
},
"cog": {
"type": "raster",
"tiles": [
"cog://https://sentinel-cogs.s3.us-west-2.amazonaws.com/sentinel-s2-l2a-cogs/54/T/WN/2024/9/S2A_54TWN_20240908_0_L2A/TCI.tif/{z}/{x}/{y}"
],
"tileSize": 256
}
},
"layers": [
{
"id": "dir",
"source": "dir",
"source-layer": "P2921",
"type": "circle",
"paint": {
"circle-radius": 10,
"circle-color": "red"
}
},
{
"id": "mbtiles",
"source": "mbtiles",
"source-layer": "P2921",
"type": "circle",
"paint": {
"circle-radius": 7,
"circle-color": "blue"
}
},
{
"id": "pmtiles",
"source": "pmtiles",
"source-layer": "P2921",
"type": "circle",
"paint": {
"circle-radius": 5,
"circle-color": "yellow"
}
},
{
"id": "s3",
"source": "s3",
"source-layer": "P2921",
"type": "circle",
"paint": {
"circle-radius": 3,
"circle-color": "green"
}
},
{
"id": "cog",
"source": "cog",
"type": "raster",
"paint": {
"raster-opacity": 0.5
}
}
]
}- chiitiler can be used as a library to render MapLibre Style.
- methods to render MapLibre Style are exposed from
chiitilerpackage.
npm install chiitiler- chiitiler requires some dependencies in runtime, you can find them in Dockerfile
import {
getRenderedBboxBuffer,
getRenderedTileBuffer,
ChiitilerCache
} from 'chiitiler';
const s3Cache = ChiitilerCache.s3Cache({
bucket: 'chiitiler',
region: 'ap-northeast-1',
endpoint: null,
});
// credentials are loaded from environment variables: AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY
const tileBuf = await getRenderedTileBuffer({
stylejson: 'https://example.com/style.json', // or StyleSpecification object
z: 0,
x: 0,
y: 0,
tileSize: 512,
ext: 'webp', // png, webp, jpg
cache: s3Cache,
quality: 80,
margin: 0,
});
const bboxBuf = await getRenderedBboxBuffer({
stylejson: 'file://path/to/style.json', // or StyleSpecification object
bbox: [123.4, 34.5, 124.5, 35.6],
size: 1024,
cache: s3Cache,
ext: 'webp',
quality: 80,
});
// return value is Buffer - binary of each image- run
docker compose up
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