Tim Schaub
054af09032
This updates ESLint and our shared eslint-config-openlayers to use Prettier. Most formatting changes were automatically applied with this:
npm run lint -- --fix
A few manual changes were required:
* In `examples/offscreen-canvas.js`, the `//eslint-disable-line` comment needed to be moved to the appropriate line to disable the error about the `'worker-loader!./offscreen-canvas.worker.js'` import.
* In `examples/webpack/exapmle-builder.js`, spaces could not be added after a couple `function`s for some reason. While editing this, I reworked `ExampleBuilder` to be a class.
* In `src/ol/format/WMSGetFeatureInfo.js`, the `// @ts-ignore` comment needed to be moved down one line so it applied to the `parsersNS` argument.
133 lines
3.4 KiB
JavaScript
133 lines
3.4 KiB
JavaScript
/**
|
|
* @module ol/proj/epsg3857
|
|
*/
|
|
import Projection from './Projection.js';
|
|
import Units from './Units.js';
|
|
import {cosh} from '../math.js';
|
|
|
|
/**
|
|
* Radius of WGS84 sphere
|
|
*
|
|
* @const
|
|
* @type {number}
|
|
*/
|
|
export const RADIUS = 6378137;
|
|
|
|
/**
|
|
* @const
|
|
* @type {number}
|
|
*/
|
|
export const HALF_SIZE = Math.PI * RADIUS;
|
|
|
|
/**
|
|
* @const
|
|
* @type {import("../extent.js").Extent}
|
|
*/
|
|
export const EXTENT = [-HALF_SIZE, -HALF_SIZE, HALF_SIZE, HALF_SIZE];
|
|
|
|
/**
|
|
* @const
|
|
* @type {import("../extent.js").Extent}
|
|
*/
|
|
export const WORLD_EXTENT = [-180, -85, 180, 85];
|
|
|
|
/**
|
|
* @classdesc
|
|
* Projection object for web/spherical Mercator (EPSG:3857).
|
|
*/
|
|
class EPSG3857Projection extends Projection {
|
|
/**
|
|
* @param {string} code Code.
|
|
*/
|
|
constructor(code) {
|
|
super({
|
|
code: code,
|
|
units: Units.METERS,
|
|
extent: EXTENT,
|
|
global: true,
|
|
worldExtent: WORLD_EXTENT,
|
|
getPointResolution: function (resolution, point) {
|
|
return resolution / cosh(point[1] / RADIUS);
|
|
},
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Projections equal to EPSG:3857.
|
|
*
|
|
* @const
|
|
* @type {Array<import("./Projection.js").default>}
|
|
*/
|
|
export const PROJECTIONS = [
|
|
new EPSG3857Projection('EPSG:3857'),
|
|
new EPSG3857Projection('EPSG:102100'),
|
|
new EPSG3857Projection('EPSG:102113'),
|
|
new EPSG3857Projection('EPSG:900913'),
|
|
new EPSG3857Projection('urn:ogc:def:crs:EPSG:6.18:3:3857'),
|
|
new EPSG3857Projection('urn:ogc:def:crs:EPSG::3857'),
|
|
new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857'),
|
|
];
|
|
|
|
/**
|
|
* Transformation from EPSG:4326 to EPSG:3857.
|
|
*
|
|
* @param {Array<number>} input Input array of coordinate values.
|
|
* @param {Array<number>=} opt_output Output array of coordinate values.
|
|
* @param {number=} opt_dimension Dimension (default is `2`).
|
|
* @return {Array<number>} Output array of coordinate values.
|
|
*/
|
|
export function fromEPSG4326(input, opt_output, opt_dimension) {
|
|
const length = input.length;
|
|
const dimension = opt_dimension > 1 ? opt_dimension : 2;
|
|
let output = opt_output;
|
|
if (output === undefined) {
|
|
if (dimension > 2) {
|
|
// preserve values beyond second dimension
|
|
output = input.slice();
|
|
} else {
|
|
output = new Array(length);
|
|
}
|
|
}
|
|
const halfSize = HALF_SIZE;
|
|
for (let i = 0; i < length; i += dimension) {
|
|
output[i] = (halfSize * input[i]) / 180;
|
|
let y = RADIUS * Math.log(Math.tan((Math.PI * (+input[i + 1] + 90)) / 360));
|
|
if (y > halfSize) {
|
|
y = halfSize;
|
|
} else if (y < -halfSize) {
|
|
y = -halfSize;
|
|
}
|
|
output[i + 1] = y;
|
|
}
|
|
return output;
|
|
}
|
|
|
|
/**
|
|
* Transformation from EPSG:3857 to EPSG:4326.
|
|
*
|
|
* @param {Array<number>} input Input array of coordinate values.
|
|
* @param {Array<number>=} opt_output Output array of coordinate values.
|
|
* @param {number=} opt_dimension Dimension (default is `2`).
|
|
* @return {Array<number>} Output array of coordinate values.
|
|
*/
|
|
export function toEPSG4326(input, opt_output, opt_dimension) {
|
|
const length = input.length;
|
|
const dimension = opt_dimension > 1 ? opt_dimension : 2;
|
|
let output = opt_output;
|
|
if (output === undefined) {
|
|
if (dimension > 2) {
|
|
// preserve values beyond second dimension
|
|
output = input.slice();
|
|
} else {
|
|
output = new Array(length);
|
|
}
|
|
}
|
|
for (let i = 0; i < length; i += dimension) {
|
|
output[i] = (180 * input[i]) / HALF_SIZE;
|
|
output[i + 1] =
|
|
(360 * Math.atan(Math.exp(input[i + 1] / RADIUS))) / Math.PI - 90;
|
|
}
|
|
return output;
|
|
}
|