def merge_featurecollection(*jsons):
    """
    merge features into one featurecollection

    Keyword arguments:
    jsons   -- jsons object list 

    return geojson featurecollection
    """
    features = []
    for json in jsons:
        if json['type'] == 'FeatureCollection':
            for feature in json['features']:
                features.append(feature)
    return {'type': 'FeatureCollection', 'features': features}
