Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | 1x 1x 1x 1x 1x 18x 17x 17x 1x 1x 1x 16x 16x 12x 4x 16x 8x 8x 1x 7x 3x 4x 16x 8x 1x 1x 6x 6x 1x 1x 1x 5x 5x 5x 4x 2x 2x 1x 1x 1x 2x 1x 1x 1x 1x | const esriProjCodes = require('@esri/proj-codes')
const Joi = require('joi')
const wktParser = require('wkt-parser')
const wktLookup = new Map()
const schema = Joi.alternatives(
Joi.string(),
Joi.number().integer(),
Joi.object({
wkid: Joi.number().integer().optional(),
latestWkid: Joi.number().integer().optional(),
wkt: Joi.string().optional()
}).unknown().or('wkid', 'latestWkid', 'wkt').required()
)
function normalizeSpatialReference (input) {
if (!input) return { wkid: 4326, latestWkid: 4326 }
const { error } = schema.validate(input)
if (error) {
Eif (process.env.NODE_ENV !== 'production') {
console.log(`WARNING: ${input} is not a valid spatial reference; defaulting to none, error: ${error}`)
}
// Todo: throw error
return { wkid: 4326, latestWkid: 4326 }
}
const { type, value } = parseSpatialReferenceInput(input)
if (type === 'wkid') {
return wktLookup.get(value) || esriWktLookup(value) || { wkid: 4326, latestWkid: 4326 }
}
return convertStringToSpatialReference(value) || { wkid: 4326, latestWkid: 4326 }
}
function parseSpatialReferenceInput (spatialReference) {
// Search input for a wkid
if (isNumericSpatialReferenceId(spatialReference)) {
return {
type: 'wkid',
value: Number(spatialReference)
}
}
if (isPrefixedSpatialReferenceId(spatialReference)) {
return {
type: 'wkid',
value: extractPrefixedSpatialReferenceId(spatialReference)
}
}
if (spatialReference.wkid || spatialReference.latestWkid) {
return {
type: 'wkid',
value: spatialReference.wkid || spatialReference.latestWkid
}
}
return {
type: 'wkt',
value: spatialReference.wkt || spatialReference
}
}
function isNumericSpatialReferenceId (spatialReference) {
return Number.isInteger(spatialReference) || Number.isInteger(Number(spatialReference))
}
function isPrefixedSpatialReferenceId (spatialReference) {
return /[A-Z]+:/.test(spatialReference)
}
function extractPrefixedSpatialReferenceId (prefixedId) {
const spatialRefId = prefixedId.match(/[A-Z]*:(.*)/)[1]
return Number(spatialRefId)
}
function esriWktLookup (lookupValue) {
const result = esriProjCodes.lookup(lookupValue)
if (!result) {
// Todo - throw error
Eif (process.env.NODE_ENV !== 'production') {
console.log(`WARNING: An unknown spatial reference was detected: ${lookupValue}; defaulting to none`)
}
return
}
const { wkid, latestWkid } = result
// Add the WKT to the local lookup so we don't need to scan the Esri lookups next time
wktLookup.set(wkid, { wkid, latestWkid })
return { latestWkid, wkid }
}
function convertStringToSpatialReference (wkt) {
if (/WGS_1984_Web_Mercator_Auxiliary_Sphere/.test(wkt)) return { wkid: 102100, latestWkid: 3857 }
try {
const wkid = getWktWkid(wkt)
return wktLookup.get(wkid) || esriWktLookup(wkid) || { wkt }
} catch (err) {
Eif (process.env.NODE_ENV !== 'production') {
console.log(`WARNING: An un-parseable WKT spatial reference was detected: ${wkt}`)
}
// Todo: throw error
}
}
function getWktWkid (wkt) {
const { AUTHORITY: authority } = wktParser(wkt)
Iif (!authority) return
const [, wkid] = Object.entries(authority)[0]
return wkid
}
module.exports = normalizeSpatialReference
|