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57 lines
1.9 KiB
JavaScript
57 lines
1.9 KiB
JavaScript
/**
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* @module ol/proj/proj4
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*/
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import Projection from './Projection.js';
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import Units from './Units.js';
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import { addCoordinateTransforms, addEquivalentProjections, addProjection, createSafeCoordinateTransform, get, } from '../proj.js';
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import { get as getTransform } from './transforms.js';
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/**
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* Make projections defined in proj4 (with `proj4.defs()`) available in
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* OpenLayers.
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*
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* This function should be called whenever changes are made to the proj4
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* registry, e.g. after calling `proj4.defs()`. Existing transforms will not be
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* modified by this function.
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*
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* @param {?} proj4 Proj4.
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* @api
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*/
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export function register(proj4) {
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var projCodes = Object.keys(proj4.defs);
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var len = projCodes.length;
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var i, j;
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for (i = 0; i < len; ++i) {
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var code = projCodes[i];
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if (!get(code)) {
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var def = proj4.defs(code);
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var units = def.units;
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if (!units && def.projName === 'longlat') {
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units = Units.DEGREES;
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}
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addProjection(new Projection({
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code: code,
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axisOrientation: def.axis,
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metersPerUnit: def.to_meter,
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units: units,
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}));
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}
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}
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for (i = 0; i < len; ++i) {
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var code1 = projCodes[i];
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var proj1 = get(code1);
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for (j = 0; j < len; ++j) {
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var code2 = projCodes[j];
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var proj2 = get(code2);
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if (!getTransform(code1, code2)) {
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if (proj4.defs[code1] === proj4.defs[code2]) {
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addEquivalentProjections([proj1, proj2]);
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}
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else {
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var transform = proj4(code1, code2);
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addCoordinateTransforms(proj1, proj2, createSafeCoordinateTransform(proj1, proj2, transform.forward), createSafeCoordinateTransform(proj2, proj1, transform.inverse));
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}
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}
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}
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}
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}
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//# sourceMappingURL=proj4.js.map
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