Do you have to use topsar split/subswaths when looking at coherence?

Microwave Toolbox Interferometry
8

When trying to use the wktaoi parameter I get the error:

RuntimeError: org.esa.snap.core.gpf.OperatorException: java.util.NoSuchElementException

As soon as I remove it I loose the error, so I’m not sure if I’m doing something wrong or if it just doesn’t work but I guess I will continue with the “Read the XML, parse the geometry out, find intersects” method

Here’s what I tried to get that error:

def polygon_to_wkt(shp):
    df = gpd.read_file(shp)
    if df.crs != "EPSG: 4326":
        df = df.to_crs(4326)
    wkt = df.to_wkt()
    wkt1 = wkt.iloc[0].geometry
    return wkt1

def topsar_split(raster, aoi_shp):
    parameters = snappy.HashMap()
    parameters.put('selectedPolarisations', 'VV,VH')
    aoi_wkt = polygon_to_wkt(aoi_shp)
    parameters.put('wktAoi', aoi_wkt)
    topssplit = snappy.GPF.createProduct('TOPSAR-Split', parameters, raster)
Error: [NodeId: TOPSAR-Split] java.util.NoSuchElementException