osm-static-maps

Openstreetmap static maps is a nodejs lib, CLI and server open source inspired on google static map service

Here you have a demo. Also a dynamic version of the demo, for testing purposes.

How to use

$3

``bash
sudo npm i -g osm-static-maps
osmsm --help
osmsm -g '{"type":"Point","coordinates":[-105.01621,39.57422]}' > map.png
`

* note: if you have this error trying to install globally Error: EACCES: permission denied, mkdir '/usr/local/lib/node_modules/osm-static-maps/node_modules/puppeteer/.local-chromium', it's caused by this pupeteer issue https://github.com/puppeteer/puppeteer/issues/367, you can workaround by installing globally with the unsafe-perm flag:

`bash
sudo npm i -g osm-static-maps --unsafe-perm=true
`

$3

`bash
npm install osm-static-maps
`

`javascript
// index.js old school
osmsm = require('osm-static-maps');
osmsm({geojson: geojson})
.then(function(imageBinaryBuffer) { ... })
.catch(function(error) { ... })

// index.js modern style (also supports typescript)
import osmsm from 'osm-static-maps'
const imageBinaryBuffer = await osmsm({geojson})
`

$3

`bash
sudo npm i -g osm-static-maps
osmsm serve
`

Or you can use docker-compose
`bash
git clone git@github.com:jperelli/osm-static-maps.git
cd osm-static-maps
docker-compose up
`

$3

You can use the heroku-hosted alternative directly here

We are currently in the cloud beta, contact me directly at jperelli+osmsm@gmail.com so I can give you access to the cloud service.

API Reference

All parameters have a short and long version. The short version can be used only with the shell CLI. The long version can be used with the library and can be passed to the app server as GET query params, or POST json body (remember to set the header Content-Type: application/json)

| | Parameter | Description | Default Value |
| - | ---- | ---- | ---- |
| g | geojson | geojson object to be rendered in the map | undefined |
| f | geojsonfile | filename or url to read geojson data from (use '-' to read from stdin on CLI) | undefined |
| H | height | height in pixels of the returned img | 600 |
| W | width | height in pixels of the returned img | 800 |
| c | center | center of the map lon,lat floats string | (center of the geojson) or '-57.9524339,-34.921779' |
| z | zoom | zoomlevel of the leaflet map | value of maxZoom |
| Z | maxZoom | max zoomlevel of the leaflet map | 17 |
| A | attribution | attribution legend | 'osm-static-maps / © OpenStreetMap contributors' |
| t | tileserverUrl | url of a tileserver | 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png' |
| m | vectorserverUrl | url of a vector tile server (MVT style.json) | undefined |
| M | vectorserverToken | token of the vector tile server (MVT) | 'no-token' |
| D | renderToHtml | returns html of the webpage containing the map (instead of a binary image) | false |
| F | type | format of the image returned ('jpeg'/'png') | 'png' |
| q | quality | quality of the image returned (0-100, only for jpg) | 100 |
| x | imagemin | enable lossless compression with optipng / jpegtran | false |
| X | oxipng | enable losslsess compression with oxipng | false |
| a | arrows | render arrows to show the direction of linestrings | false |
| s | scale | enable render a scale ruler (boolean or a json options object) | false |
| T | timeout | miliseconds until page load throws timeout | 20000 |
| k | markerIconOptions | set marker icon options (a json options object) *see note | undefined (leaflet's default marker) |
| S | style | style to apply to each feature (a json options object) *see note | undefined (leaflet's default) |
| e | haltOnConsoleError | throw error if there is any console.error(...) when rendering the map image | false |

* Note on markerIconOptions: it's also accepted a markerIconOptions attribute in the geojson feature, for example {"type":"Point","coordinates":[-105.01621,39.57422],"markerIconOptions":{"iconUrl":"https://leafletjs.com/examples/custom-icons/leaf-red.png"}}

* Note on style: it's also accepted a pathOptions attribute in the geojson feature, for example {"type":"Polygon","coordinates":[[[-56.698,-36.413],[-56.716,-36.348],[-56.739,-36.311]]],"pathOptions":{"color":"#FF5555"}} (also remember that the # char needs to be passed as %23` if you are using GET params)

Design considerations & architecture

Read the blogpost on the creation of this library and how it works internally

LICENSE

- GPLv2

Credits

Specially to the contributors of

- OpenStreetMap
- Leaflet
- Puppeteer
- ExpressJS
- Handlebars