function readFeatureByWKT(wkt, sourceCode, targetCode) {
    try {
        var view = map.getView();
        if (!wkt) {
            return null;
        }
        var format = new ol.format.WKT();
        var feature = format.readFeature(wkt, {
            featureProjection: targetCode || view.getProjection(),
            dataProjection: sourceCode || view.getProjection(),
        });

    return feature;
} catch (e) {
    return null;
}
}
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