spatialreference
Version:
A helper library for translating spatial reference systems
63 lines (54 loc) • 4.27 kB
JavaScript
const test = require('tape')
const SpatialReference = require('../src/index')
const wkidHash = new Map()
wkidHash.set(2927, 'PROJCS["NAD83(HARN) / Washington South (ftUS)",GEOGCS["NAD83(HARN)",DATUM["NAD83_High_Accuracy_Regional_Network",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[-0.9956,1.9013,0.5215,0.025915,0.009426,0.011599,-0.00062],AUTHORITY["EPSG","6152"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4152"]],UNIT["US survey foot",0.3048006096012192,AUTHORITY["EPSG","9003"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["standard_parallel_1",47.33333333333334],PARAMETER["standard_parallel_2",45.83333333333334],PARAMETER["latitude_of_origin",45.33333333333334],PARAMETER["central_meridian",-120.5],PARAMETER["false_easting",1640416.667],PARAMETER["false_northing",0],AUTHORITY["EPSG","2927"],AXIS["X",EAST],AXIS["Y",NORTH]]')
// set up a fake db object with the methods the constructor is looking for
var db = {
getWKT: function (wkid, callback) {
const wkt = wkidHash.get(wkid)
if (!wkt) return callback(null, undefined)
callback(null, wkt)
},
insertWKT: function (wkid, wkt, callback) {
wkidHash.set(wkid, wkt)
callback(null)
}
}
var sr = new SpatialReference({db: db})
test('translating wkid to wkt', function (t) {
t.test('when the wkid is in the db', function (t) {
t.plan(2)
sr.wkidToWkt(2927, function (err, wkt) {
t.equals(err, null)
t.equals(wkt, 'PROJCS["NAD83(HARN) / Washington South (ftUS)",GEOGCS["NAD83(HARN)",DATUM["NAD83_High_Accuracy_Regional_Network",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],TOWGS84[-0.9956,1.9013,0.5215,0.025915,0.009426,0.011599,-0.00062],AUTHORITY["EPSG","6152"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4152"]],UNIT["US survey foot",0.3048006096012192,AUTHORITY["EPSG","9003"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["standard_parallel_1",47.33333333333334],PARAMETER["standard_parallel_2",45.83333333333334],PARAMETER["latitude_of_origin",45.33333333333334],PARAMETER["central_meridian",-120.5],PARAMETER["false_easting",1640416.667],PARAMETER["false_northing",0],AUTHORITY["EPSG","2927"],AXIS["X",EAST],AXIS["Y",NORTH]]')
})
})
t.test('when the wkid is not in the db, but is in ESRI current', function (t) {
t.plan(4)
sr.wkidToWkt(4269, function (err, wkt) {
t.equals(err, null)
t.equals(wkt, 'GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]')
t.equals(err, null)
t.equals(wkidHash.get(4269), 'GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]')
})
})
t.test('when the wkid is not in the db, but is in ESRI deprecated', function (t) {
t.plan(4)
sr.wkidToWkt(102645, function (err, wkt) {
const actualWkt = 'PROJCS["NAD_1983_StatePlane_California_V_FIPS_0405_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",6561666.666666666],PARAMETER["False_Northing",1640416.666666667],PARAMETER["Central_Meridian",-118.0],PARAMETER["Standard_Parallel_1",34.03333333333333],PARAMETER["Standard_Parallel_2",35.46666666666667],PARAMETER["Latitude_Of_Origin",33.5],UNIT["Foot_US",0.3048006096012192]]'
t.equals(err, null)
t.equals(wkt, actualWkt)
t.equals(err, null)
t.equals(wkidHash.get(102645), actualWkt)
})
})
})
test('direct esri lookup', function (t) {
t.test('when the wkid is not deprecated', function (t) {
t.plan(2)
sr.esriLookup(4269, function (err, wkt) {
t.equals(err, null)
t.equals(wkt, 'GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]')
})
})
})