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make resolution in getGetLegendGraphicUrl optional

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This commit is contained in:
simonseyock
2019-07-08 15:14:06 +02:00
parent f493f01bd0
commit c0000e745e
4 changed files with 40 additions and 19 deletions
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19
src/ol/source/ImageWMS.js
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@@ -194,7 +194,8 @@ class ImageWMS extends ImageSource {
/**
* Return the GetLegendGraphic URL for the passed resolution.
* Return `undefined` if the GetLegendGraphic URL cannot be constructed.
* @param {number} resolution Resolution.
* @param {!number} resolution Resolution. If set to undefined `SCALE`
* will not be calculated.
* @param {!Object} params GetLegendGraphic params. Default `FORMAT` is
* `image/png`. `VERSION` should not be specified here.
* @return {string|undefined} GetLegendGraphic URL.
@@ -207,19 +208,21 @@ class ImageWMS extends ImageSource {
return undefined;
}
const mpu = this.getProjection() ? this.getProjection().getMetersPerUnit() : 1;
const dpi = 25.4 / 0.28;
const inchesPerMeter = 39.37;
const scale = resolution * mpu * inchesPerMeter * dpi;
const baseParams = {
'SERVICE': 'WMS',
'VERSION': DEFAULT_WMS_VERSION,
'REQUEST': 'GetLegendGraphic',
'FORMAT': 'image/png',
'LAYER': layers,
'SCALE': scale
'LAYER': layers
};
if (resolution !== undefined) {
const mpu = this.getProjection() ? this.getProjection().getMetersPerUnit() : 1;
const dpi = 25.4 / 0.28;
const inchesPerMeter = 39.37;
baseParams['SCALE'] = resolution * mpu * inchesPerMeter * dpi;
}
assign(baseParams, params);
return appendParams(/** @type {string} */ (this.url_), baseParams);