Created
September 20, 2016 10:01
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WOF post code script
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var shp = require('shpjs'); | |
var walk = require('walk') | |
var fs = require('fs') | |
var turfArea = require('turf-area') | |
var turfBbox = require('turf-bbox') | |
var turfCentroid = require('turf-centroid') | |
var newSrcData = fs.readFileSync(__dirname +"/src/ABS_Postcodes.geojson", 'utf8'); | |
newSrcData = JSON.parse(newSrcData); | |
var walker = walk.walk(__dirname + "/wof-postcodes-au"); | |
walker.on("file", function (root, fileStats, next) { | |
if (fileStats.name.includes('geojson')){ | |
var currentWOF = fs.readFileSync(root + '\\' + fileStats.name, 'utf8') | |
var originalGeojson = JSON.parse(currentWOF); | |
var match = findMatchingPoly(originalGeojson.properties['wof:name']) | |
if (match === null){ | |
next(); | |
} | |
else { | |
originalGeojson.geometry = match.geometry | |
originalGeojson.geometry = match.geometry | |
originalGeojson.properties.area_square_m = turfArea(match) | |
var newBBox = turfBbox(match) | |
originalGeojson.properties.bbox = newBBox | |
originalGeojson.bbox = newBBox | |
var newCentroid = turfCentroid(match) | |
originalGeojson.properties['geom:latitude'] = newCentroid.geometry.coordinates[0][1] | |
originalGeojson.properties['geom:longitude'] = newCentroid.geometry.coordinates[0][0] | |
console.log(fileStats.name + " edited") | |
fs.writeFileSync(root + '\\' + fileStats.name, JSON.stringify(originalGeojson, null, 2)) | |
} | |
} | |
next(); | |
}); | |
function findMatchingPoly(postcode) { | |
var matchingFeatures = newSrcData.features.filter(function(item){ | |
return item.properties['POA_CODE'] == postcode; | |
}) | |
if(matchingFeatures.length > 0){ | |
return matchingFeatures[0] | |
} | |
else { | |
return null; | |
} | |
} |
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