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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 65x 64x 64x 1x 1x 1x 63x 63x 59x 4x 63x 44x 19x 1x 18x 14x 4x 63x 19x 1x 1x 7x 7x 1x 1x 1x 6x 6x 6x 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 |