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osrm-text-instructions
Advanced tools
OSRM Text Instructions is a Node.js library that transforms route data generated by OSRM into localized turn instructions to be displayed visually or read aloud by a text-to-speech engine. OSRM Text Instructions is the basis of guidance instructions in osrm-frontend, the Mapbox Directions API, and the Mapbox Navigation SDK.
var version = 'v5';
var osrmTextInstructions = require('osrm-text-instructions')(version);
response.legs.forEach(function(leg) {
leg.steps.forEach(function(step) {
instruction = osrmTextInstructions.compile('en', step, options)
});
});
If you are unsure if the user's locale is supported by osrm-text-inustrctions, use @mapbox/locale-utils for finding the best fitting language.
require('osrm-text-instructions')(version)
parameter | required? | values | description |
---|---|---|---|
version | required | v5 | Major OSRM version |
compile(language, step, options)
parameter | required? | values | description |
---|---|---|---|
language | required | en de zh-Hans fr nl ru and more | Compiling instructions for the selected language code. |
step | required | OSRM route step object | The RouteStep as it comes out of OSRM |
options | optional | Object | See below |
key | type | description |
---|---|---|
legCount | integer | Number of legs in the route |
legIndex | integer | Zero-based index of the leg containing the step; together with legCount , this option determines which waypoint the user has arrived at |
formatToken | function | Function that formats the given token value after grammaticalization and capitalization but before the value is inserted into the instruction string; useful for wrapping tokens in markup |
waypointName | string | Optional custom name for the leg's destination, replaces "your {nth} destination" |
formatToken
takes two parameters:
token
: A string that indicates the kind of token, such as way_name
or direction
value
: A grammatical string for this token, capitalized if the token appears at the beginning of the instructionand returns a string.
We welcome feedback, code contributions, and translations! Please see CONTRIBUTING.md for details.
FAQs
OSRM Text Instructions
The npm package osrm-text-instructions receives a total of 15,716 weekly downloads. As such, osrm-text-instructions popularity was classified as popular.
We found that osrm-text-instructions demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 11 open source maintainers collaborating on the project.
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