api_coordinatetransformation.test.js

const gdal = require('../lib/gdal.js')
const assert = require('chai').assert

describe('gdal.CoordinateTransformation', () => {
  afterEach(gc)

  it('should be exposed', () => {
    assert.ok(gdal.CoordinateTransformation)
  })
  it('should handle Proj.4', () => {
    const srs0 = gdal.SpatialReference.fromProj4(
      '+proj=lcc +lat_1=49 +lat_2=45 +lat_0=44.25 +lon_0=-109.5 +x_0=599999.9999976 +y_0=0 +ellps=GRS80 +datum=NAD83 +to_meter=0.3048 +no_defs'
    )
    const srs1 = gdal.SpatialReference.fromProj4('+init=epsg:4326')

    const pt = new gdal.Point(1, 2)
    const ct = new gdal.CoordinateTransformation(srs0, srs1)
    pt.transform(ct)

    assert.closeTo(pt.x, -116.98546236548084, 0.1)
    assert.closeTo(pt.y, 43.99194884775841, 0.1)
  })
  it('should handle Proj.4 (EPSG)', () => {
    const srs0 = gdal.SpatialReference.fromProj4('+init=epsg:4326')
    const srs1 = gdal.SpatialReference.fromProj4('+init=epsg:32632')

    const pt = new gdal.Point(20, 30)
    const ct = new gdal.CoordinateTransformation(srs0, srs1)
    pt.transform(ct)

    assert.closeTo(pt.x, 1564201.4044502454, 0.1)
    assert.closeTo(pt.y, 3370263.469590679, 0.1)
  })
})