Snappy_subset.py does not save all the input metadata data

snap
1

Hi,

I am using snappy_subset.py to create a subset of sentintel 1 images. However, it does not save all the metadata from the imput datasets, loosing that under the Original_Product_Metadata, which has the calibration files needed to perform the radiometric calibration of the radar data.

Any help will be really appreciated.

2

what is the output format of your subset image?

3

BEAM-DIMAP format.

4

are you working with SLC or GRD data?

5

With GRD data

6

can you please share the script you use?

7

import os
import sys
import snappy
from snappy import ProductIO, WKTReader

SubsetOp = snappy.jpy.get_type(‘org.esa.snap.core.gpf.common.SubsetOp’)

if len(sys.argv) != 3:
print(“usage: s <file> <geometry-wkt>" sys.argv[0])
print(” s ./TEST.N1 \"POLYGON((15.786082 45.30223, 11.798364 46.118263, 10.878688 43.61961, 14.722727" "42.85818, 15.786082 45.30223))\"" sys.argv[0])
sys.exit(1)

file_path = os.getcwd()
file = file_path + ‘\’ + sys.argv[1]

filename=os.path.splitext(os.path.basename(file))[0]
print("filename: ", filename)

wkt = sys.argv[2]

geom = WKTReader().read(wkt)

print(“Reading…”)

product = ProductIO.readProduct(file)

op = SubsetOp()
op.setSourceProduct(product)
op.setGeoRegion(geom)

sub_product = op.getTargetProduct()

print(“Writing…”)

ProductIO.writeProduct(sub_product, ‘…/R03_Subset/’+filename+‘_subset.dim’, ‘BEAM-DIMAP’)

print(“Done.”)

8

Hi Andreas,

Some of the symbols in the print function have been corrupted in the copy/paste. Nevertheless the script is in this link:

Thanks and regards.

9

let’s wait for @marpet then who created this script :slight_smile:

10

Hi palejandro,

Try adding

op.setCopyMetadata(True)

to the code.

I’ve updated the script in the repository too.

11

It works. Thank you very much.