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csv2geojson.js
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(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.csv2geojson = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
'use strict';
var dsv = require('d3-dsv'),
sexagesimal = require('@mapbox/sexagesimal');
var latRegex = /(Lat)(itude)?/gi,
lonRegex = /(L)(on|ng)(gitude)?/i;
function guessHeader(row, regexp) {
var name, match, score;
for (var f in row) {
match = f.match(regexp);
if (match && (!name || match[0].length / f.length > score)) {
score = match[0].length / f.length;
name = f;
}
}
return name;
}
function guessLatHeader(row) { return guessHeader(row, latRegex); }
function guessLonHeader(row) { return guessHeader(row, lonRegex); }
function isLat(f) { return !!f.match(latRegex); }
function isLon(f) { return !!f.match(lonRegex); }
function keyCount(o) {
return (typeof o == 'object') ? Object.keys(o).length : 0;
}
function autoDelimiter(x) {
var delimiters = [',', ';', '\t', '|'];
var results = [];
delimiters.forEach(function (delimiter) {
var res = dsv.dsvFormat(delimiter).parse(x);
if (res.length >= 1) {
var count = keyCount(res[0]);
for (var i = 0; i < res.length; i++) {
if (keyCount(res[i]) !== count) return;
}
results.push({
delimiter: delimiter,
arity: Object.keys(res[0]).length,
});
}
});
if (results.length) {
return results.sort(function (a, b) {
return b.arity - a.arity;
})[0].delimiter;
} else {
return null;
}
}
/**
* Silly stopgap for dsv to d3-dsv upgrade
*
* @param {Array} x dsv output
* @returns {Array} array without columns member
*/
function deleteColumns(x) {
delete x.columns;
return x;
}
function auto(x) {
var delimiter = autoDelimiter(x);
if (!delimiter) return null;
return deleteColumns(dsv.dsvFormat(delimiter).parse(x));
}
function csv2geojson(x, options, callback) {
if (!callback) {
callback = options;
options = {};
}
options.delimiter = options.delimiter || ',';
var latfield = options.latfield || '',
lonfield = options.lonfield || '',
crs = options.crs || '';
var features = [],
featurecollection = {type: 'FeatureCollection', features: features};
if (crs !== '') {
featurecollection.crs = {type: 'name', properties: {name: crs}};
}
if (options.delimiter === 'auto' && typeof x == 'string') {
options.delimiter = autoDelimiter(x);
if (!options.delimiter) {
callback({
type: 'Error',
message: 'Could not autodetect delimiter'
});
return;
}
}
var numericFields = options.numericFields ? options.numericFields.split(',') : null;
var parsed = (typeof x == 'string') ?
dsv.dsvFormat(options.delimiter).parse(x, function (d) {
if (numericFields) {
for (var key in d) {
if (numericFields.includes(key)) {
d[key] = +d[key];
}
}
}
return d;
}) : x;
if (!parsed.length) {
callback(null, featurecollection);
return;
}
var errors = [];
var i;
if (!latfield) latfield = guessLatHeader(parsed[0]);
if (!lonfield) lonfield = guessLonHeader(parsed[0]);
var noGeometry = (!latfield || !lonfield);
if (noGeometry) {
for (i = 0; i < parsed.length; i++) {
features.push({
type: 'Feature',
properties: parsed[i],
geometry: null
});
}
callback(errors.length ? errors : null, featurecollection);
return;
}
for (i = 0; i < parsed.length; i++) {
if (parsed[i][lonfield] !== undefined &&
parsed[i][latfield] !== undefined) {
var lonk = parsed[i][lonfield],
latk = parsed[i][latfield],
lonf, latf,
a;
a = sexagesimal(lonk, 'EW');
if (a) lonk = a;
a = sexagesimal(latk, 'NS');
if (a) latk = a;
lonf = parseFloat(lonk);
latf = parseFloat(latk);
if (isNaN(lonf) ||
isNaN(latf)) {
errors.push({
message: 'A row contained an invalid value for latitude or longitude',
row: parsed[i],
index: i
});
} else {
if (!options.includeLatLon) {
delete parsed[i][lonfield];
delete parsed[i][latfield];
}
features.push({
type: 'Feature',
properties: parsed[i],
geometry: {
type: 'Point',
coordinates: [
parseFloat(lonf),
parseFloat(latf)
]
}
});
}
}
}
callback(errors.length ? errors : null, featurecollection);
}
function toLine(gj) {
var features = gj.features;
var line = {
type: 'Feature',
geometry: {
type: 'LineString',
coordinates: []
}
};
for (var i = 0; i < features.length; i++) {
line.geometry.coordinates.push(features[i].geometry.coordinates);
}
line.properties = features.reduce(function (aggregatedProperties, newFeature) {
for (var key in newFeature.properties) {
if (!aggregatedProperties[key]) {
aggregatedProperties[key] = [];
}
aggregatedProperties[key].push(newFeature.properties[key]);
}
return aggregatedProperties;
}, {});
return {
type: 'FeatureCollection',
features: [line]
};
}
function toPolygon(gj) {
var features = gj.features;
var poly = {
type: 'Feature',
geometry: {
type: 'Polygon',
coordinates: [[]]
}
};
for (var i = 0; i < features.length; i++) {
poly.geometry.coordinates[0].push(features[i].geometry.coordinates);
}
poly.properties = features.reduce(function (aggregatedProperties, newFeature) {
for (var key in newFeature.properties) {
if (!aggregatedProperties[key]) {
aggregatedProperties[key] = [];
}
aggregatedProperties[key].push(newFeature.properties[key]);
}
return aggregatedProperties;
}, {});
return {
type: 'FeatureCollection',
features: [poly]
};
}
module.exports = {
isLon: isLon,
isLat: isLat,
guessLatHeader: guessLatHeader,
guessLonHeader: guessLonHeader,
csv: dsv.csvParse,
tsv: dsv.tsvParse,
dsv: dsv,
auto: auto,
csv2geojson: csv2geojson,
toLine: toLine,
toPolygon: toPolygon
};
},{"@mapbox/sexagesimal":2,"d3-dsv":3}],2:[function(require,module,exports){
module.exports = element;
module.exports.pair = pair;
module.exports.format = format;
module.exports.formatPair = formatPair;
module.exports.coordToDMS = coordToDMS;
function element(x, dims) {
return search(x, dims).val;
}
function formatPair(x) {
return format(x.lat, 'lat') + ' ' + format(x.lon, 'lon');
}
// Is 0 North or South?
function format(x, dim) {
var dms = coordToDMS(x,dim);
return dms.whole + '° ' +
(dms.minutes ? dms.minutes + '\' ' : '') +
(dms.seconds ? dms.seconds + '" ' : '') + dms.dir;
}
function coordToDMS(x,dim) {
var dirs = {
lat: ['N', 'S'],
lon: ['E', 'W']
}[dim] || '',
dir = dirs[x >= 0 ? 0 : 1],
abs = Math.abs(x),
whole = Math.floor(abs),
fraction = abs - whole,
fractionMinutes = fraction * 60,
minutes = Math.floor(fractionMinutes),
seconds = Math.floor((fractionMinutes - minutes) * 60);
return {
whole: whole,
minutes: minutes,
seconds: seconds,
dir: dir
};
}
function search(x, dims, r) {
if (!dims) dims = 'NSEW';
if (typeof x !== 'string') return { val: null, regex: r };
r = r || /[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)°?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/gi;
var m = r.exec(x);
if (!m) return { val: null, regex: r };
var dim = m[1] || m[5];
if (dim && dims.indexOf(dim) === -1) return { val: null, regex: r };
return {
val: (((m[2]) ? parseFloat(m[2]) : 0) +
((m[3] ? parseFloat(m[3]) / 60 : 0)) +
((m[4] ? parseFloat(m[4]) / 3600 : 0))) *
((dim === 'S' || dim === 'W') ? -1 : 1),
regex: r,
raw: m[0],
dim: dim
};
}
function pair(x, dims) {
x = x.trim();
var one = search(x, dims);
if (one.val === null) return null;
var two = search(x, dims, one.regex);
if (two.val === null) return null;
// null if one/two are not contiguous.
if (one.raw + two.raw !== x) return null;
if (one.dim) {
return swapdim(one.val, two.val, one.dim);
} else {
return [one.val, two.val];
}
}
function swapdim(a, b, dim) {
if (dim === 'N' || dim === 'S') return [a, b];
if (dim === 'W' || dim === 'E') return [b, a];
}
},{}],3:[function(require,module,exports){
// https://d3js.org/d3-dsv/ Version 1.0.1. Copyright 2016 Mike Bostock.
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(factory((global.d3 = global.d3 || {})));
}(this, function (exports) { 'use strict';
function objectConverter(columns) {
return new Function("d", "return {" + columns.map(function(name, i) {
return JSON.stringify(name) + ": d[" + i + "]";
}).join(",") + "}");
}
function customConverter(columns, f) {
var object = objectConverter(columns);
return function(row, i) {
return f(object(row), i, columns);
};
}
// Compute unique columns in order of discovery.
function inferColumns(rows) {
var columnSet = Object.create(null),
columns = [];
rows.forEach(function(row) {
for (var column in row) {
if (!(column in columnSet)) {
columns.push(columnSet[column] = column);
}
}
});
return columns;
}
function dsv(delimiter) {
var reFormat = new RegExp("[\"" + delimiter + "\n]"),
delimiterCode = delimiter.charCodeAt(0);
function parse(text, f) {
var convert, columns, rows = parseRows(text, function(row, i) {
if (convert) return convert(row, i - 1);
columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
});
rows.columns = columns;
return rows;
}
function parseRows(text, f) {
var EOL = {}, // sentinel value for end-of-line
EOF = {}, // sentinel value for end-of-file
rows = [], // output rows
N = text.length,
I = 0, // current character index
n = 0, // the current line number
t, // the current token
eol; // is the current token followed by EOL?
function token() {
if (I >= N) return EOF; // special case: end of file
if (eol) return eol = false, EOL; // special case: end of line
// special case: quotes
var j = I, c;
if (text.charCodeAt(j) === 34) {
var i = j;
while (i++ < N) {
if (text.charCodeAt(i) === 34) {
if (text.charCodeAt(i + 1) !== 34) break;
++i;
}
}
I = i + 2;
c = text.charCodeAt(i + 1);
if (c === 13) {
eol = true;
if (text.charCodeAt(i + 2) === 10) ++I;
} else if (c === 10) {
eol = true;
}
return text.slice(j + 1, i).replace(/""/g, "\"");
}
// common case: find next delimiter or newline
while (I < N) {
var k = 1;
c = text.charCodeAt(I++);
if (c === 10) eol = true; // \n
else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \r|\r\n
else if (c !== delimiterCode) continue;
return text.slice(j, I - k);
}
// special case: last token before EOF
return text.slice(j);
}
while ((t = token()) !== EOF) {
var a = [];
while (t !== EOL && t !== EOF) {
a.push(t);
t = token();
}
if (f && (a = f(a, n++)) == null) continue;
rows.push(a);
}
return rows;
}
function format(rows, columns) {
if (columns == null) columns = inferColumns(rows);
return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {
return columns.map(function(column) {
return formatValue(row[column]);
}).join(delimiter);
})).join("\n");
}
function formatRows(rows) {
return rows.map(formatRow).join("\n");
}
function formatRow(row) {
return row.map(formatValue).join(delimiter);
}
function formatValue(text) {
return text == null ? ""
: reFormat.test(text += "") ? "\"" + text.replace(/\"/g, "\"\"") + "\""
: text;
}
return {
parse: parse,
parseRows: parseRows,
format: format,
formatRows: formatRows
};
}
var csv = dsv(",");
var csvParse = csv.parse;
var csvParseRows = csv.parseRows;
var csvFormat = csv.format;
var csvFormatRows = csv.formatRows;
var tsv = dsv("\t");
var tsvParse = tsv.parse;
var tsvParseRows = tsv.parseRows;
var tsvFormat = tsv.format;
var tsvFormatRows = tsv.formatRows;
exports.dsvFormat = dsv;
exports.csvParse = csvParse;
exports.csvParseRows = csvParseRows;
exports.csvFormat = csvFormat;
exports.csvFormatRows = csvFormatRows;
exports.tsvParse = tsvParse;
exports.tsvParseRows = tsvParseRows;
exports.tsvFormat = tsvFormat;
exports.tsvFormatRows = tsvFormatRows;
Object.defineProperty(exports, '__esModule', { value: true });
}));
},{}]},{},[1])(1)
});