Nearly Pooped Myself

    striker

    0.1.2 • Public • Published

    striker

    Build Status

    Given a GeoJSON line, calculate the strike and dip of a best-fit plane for that line.

    How it works

    The script finds elevation values for each point along the line using the Mapbox Surface API. Then, it generates a list of all the planes that could be defined by any group of three points in the line. Using each potential plane, turf-planepoint compares the true elevation of each point in the line to a projected value on that plane. The plane with the closest match to real elevation values is used and a strike and dip are calculated.

    Configuration

    In order to use the Mapbox Surface API you must have a Mapbox access token with sufficient permissions to access Mapbox elevation data. You can set your token using an environment variable (MapboxAccessToken) or with a flag when calling the command directly.

    Installation and usage

    Provides a shell script you can use. Pipe a LineString or MultiLineString into stdin or as a parameter

    $ npm install -g striker
     
    $ cat my-line.geojson | striker
     
    $ cat my-line.geojson | striker --token pk.xxx
     
    $ striker '{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-112.32005596160889,36.17280264906953],[-112.31984
    13848877,36.17675185235112],[-112.32409000396729,36.176717211082384]]}}'

    Or, use it in JavaScript

    var striker = require('striker')({
      token: mapboxAccessToken
    });
     
    var geojson = {
      type: 'Feature',
      geometry: {
        type: 'LineString',
        coordinates: [
          [-112.32005596160889,36.17280264906953],
          [-112.3198413848877,36.17675185235112],
          [-112.32409000396729,36.176717211082384]
        ]
      }
    };
     
    striker(geojson, function(err, plane) {
      console.log('Strike: %s', plane.strike);
      console.log('Dip: %s', plane.dip);
    });

    Install

    npm i striker

    DownloadsWeekly Downloads

    3

    Version

    0.1.2

    License

    ISC

    Last publish

    Collaborators

    • rclark