nws-ahps-gauges

get river flood gauge data from the National Weather Service (NWS) Advanced Hydrologic Prediction Service (AHPS).

3 accessible functions:

• stream(key, options)
  • key - @{String}, Required. Can be a two-letter state code (ex: "tx") or an NWS office code (ex: "ewx")
  • options - @{Object}. Optional. Applied default options are:

    var defaults = {
        fcst_type: 'obs',
        percent: 50,
        current_type: 'all',
        populate_viewport: 1,
        timeframe: 0,
    };

• geojsonify(options)

  • options - @{Object}. Optional. An object which will be merged with each features' "properties". Used if you would like to apply additional feature.properties to the output features.

• metadata(id)

  • id - @{String}. Required. String of the flood gage LID. A 5 digital acronym of the gage name. Can be found at the NWS AHPS website. (ex: "PRKT2" for the gage Concho River at Paint Rock, TX)

example

// write out all texas gauges as a geojson feature collection

var JSONStream = require('JSONStream');
var featurecollection = require('turf-featurecollection')
var es = require('event-stream');

var nwsGauges = require('../index.js');

nwsGauges.stream('tx')
  .pipe(nwsGauges.geojsonify({style: true}))
  .pipe(es.writeArray(function(err, features) {
    var fc = featurecollection(features);
    es.readArray([fc])
      .pipe(JSONStream.stringify(false))
      .pipe(process.stdout);
  }));

for more functional examples, see the 'examples' directory of this repo.