sg-heatmap/dist/es/clean.js

Open-source all-in-one Swiss Army knife tool for creating Choropleth maps

import { encodePolyline, fromSVY21 } from './helpers/geometry';
import fs from 'fs';

var filenames = {
  region_np14: 'mp14-region-no-sea-pl',
  planning_area_mp14: 'mp14-plng-area-no-sea-pl',
  subzone_mp14: 'mp14-subzone-no-sea-pl',
  region_mp08: 'mp08-region-no-sea-pl',
  planning_area_mp08: 'mp08-plng-area-no-sea-pl',
  subzone_mp08: 'mp08-subzone-no-sea-pl',
  region_mp98: 'mp98-region-no-sea-pl',
  // planning_area_mp98: 'mp98-plng-area-no-sea-pl',
  // subzone_mp98: 'mp98-subzone-no-sea-pl',
  npc: 'npc-boundary'
};

var propertiesMap = {
  'OBJECTID': 'OBJECTID',
  'SUBZONE_NO': 'Subzone_Number',
  'SUBZONE_N': 'Subzone_Name',
  'SUBZONE_C': 'Subzone_Code',
  'CA_IND': 'Central_Area_Indicator',
  'PLN_AREA_N': 'Planning_Area_Name',
  'PLN_AREA_C': 'Planning_Area_Code',
  'REGION_N': 'Region_Name',
  'REGION_C': 'Region_Code',
  'DIVISION': 'Division_Name',
  'DIV': 'Division_Code',
  'NPC_NAME': 'NPC_Name',
  'INC_CRC': 'INC_CRC',
  'FMEL_UPD_D': 'FMEL_UPD_D',
  'X_ADDR': 'X_ADDR',
  'Y_ADDR': 'Y_ADDR',
  'SHAPE_Leng': 'Shape_Length',
  'SHAPE_Area': 'Shape_Area'
};

Object.keys(filenames).forEach(function (layer) {
  var _JSON$parse = JSON.parse(fs.readFileSync('data/raw/' + filenames[layer] + '.json')),
      features = _JSON$parse.features;

  features.forEach(function (f) {
    var properties = {};
    Object.keys(propertiesMap).forEach(function (prop) {
      if (prop in f.properties) {
        properties[propertiesMap[prop]] = f.properties[prop];
      }
    });
    properties.Address = layer === 'npc' ? [properties.X_ADDR, properties.Y_ADDR] : fromSVY21([properties.X_ADDR, properties.Y_ADDR]);
    f.properties = properties;
    f.id = properties.Subzone_Code || properties.Planning_Area_Code || properties.Region_Code || properties.NPC_Name && shortenNPC(properties.NPC_Name);

    if (f.geometry.type === 'Polygon') {
      f.geometry.coordinates = f.geometry.coordinates.map(encodePolyline);
    } else if (f.geometry.type === 'MultiPolygon') {
      f.geometry.coordinates = f.geometry.coordinates.map(function (polygon) {
        return polygon.map(encodePolyline);
      });
    }
  });
  fs.writeFileSync('data/' + layer + '.json', JSON.stringify(features));
});

function shortenNPC(npcName) {
  return npcName.replace(/Neighbourhood Police Centre$/, 'NPC');
}