def runMultilook(in_dir,
out_dir,
alks,
rlks,
in_ext='.rdr',
out_ext='.rdr',
method='gdal',
fbase_list=[
'hgt', 'incLocal', 'lat', 'lon', 'los', 'shadowMask',
'waterMask'
]):
"""
Multilook geometry files.
"""
from iscesys.Parsers.FileParserFactory import createFileParser
from mroipac.looks.Looks import Looks
msg = 'generate multilooked geometry files with alks={} and rlks={}'.format(
alks, rlks)
if method == 'isce':
msg += ' using mroipac.looks.Looks() ...'
else:
msg += ' using gdal.Translate() ...'
print('-' * 50 + '\n' + msg)
# create 'geom_reference' directory
os.makedirs(out_dir, exist_ok=True)
# multilook files one by one
for fbase in fbase_list:
in_file = os.path.join(in_dir, '{}{}'.format(fbase, in_ext))
out_file = os.path.join(out_dir, '{}{}'.format(fbase, out_ext))
if all(os.path.isfile(in_file + ext) for ext in ['', '.vrt', '.xml']):
print('multilook {}'.format(in_file))
# option 1 - Looks module (isce)
if method == 'isce':
xmlProp = createFileParser('xml').parse(in_file + '.xml')[0]
if ('image_type' in xmlProp
and xmlProp['image_type'] == 'dem'):
inImage = isceobj.createDemImage()
else:
inImage = isceobj.createImage()
inImage.load(in_file + '.xml')
inImage.filename = in_file
lkObj = Looks()
lkObj.setDownLooks(alks)
lkObj.setAcrossLooks(rlks)
lkObj.setInputImage(inImage)
lkObj.setOutputFilename(out_file)
lkObj.looks()
# option 2 - gdal_translate (gdal)
elif method == 'gdal':
ds = gdal.Open(in_file, gdal.GA_ReadOnly)
in_wid = ds.RasterXSize
in_len = ds.RasterYSize
out_wid = int(in_wid / rlks)
out_len = int(in_len / alks)
src_wid = out_wid * rlks
src_len = out_len * alks
options_str = '-of ENVI -a_nodata 0 -outsize {ox} {oy} -srcwin 0 0 {sx} {sy} '.format(
ox=out_wid, oy=out_len, sx=src_wid, sy=src_len)
gdal.Translate(out_file, ds, options=options_str)
dso = gdal.Open(out_file, gdal.GA_ReadOnly)
gdal.Translate(out_file + '.vrt',
dso,
options=gdal.TranslateOptions(format='VRT'))
# generate ISCE .xml file
if not os.path.isfile(out_file + '.xml'):
from isce.applications.gdal2isce_xml import gdal2isce_xml
gdal2isce_xml(out_file + '.vrt')
else:
raise ValueError(
'un-supported multilook method: {}'.format(method))
# copy the full resolution xml/vrt file from ./merged/geom_reference to ./geom_reference
# to facilitate the number of looks extraction
# the file path inside .xml file is not, but should, updated
if in_file != out_file + '.full':
shutil.copy(in_file + '.xml', out_file + '.full.xml')
shutil.copy(in_file + '.vrt', out_file + '.full.vrt')
return out_dir
# (this is approximate, could use instead exact expression)
if inps.res_meter != '':
gdal_opts = gdal.WarpOptions(format='ENVI',
outputType=gdal.GDT_Int16,
dstSRS='EPSG:4326',
xRes=float(inps.res_meter) / 110 / 1000,
yRes=float(inps.res_meter) / 110 / 1000,
targetAlignedPixels=True)
# res_degree = float(inps.res_meter)/110/1000
elif inps.res_seconds != '':
gdal_opts = gdal.WarpOptions(
format='ENVI',
outputType=gdal.GDT_Int16,
dstSRS='EPSG:4326',
xRes=float(inps.res_seconds) * 1 / 60 * 1 / 60,
yRes=float(inps.res_seconds) * 1 / 60 * 1 / 60,
targetAlignedPixels=True)
# res_degree = float(1/60*1/60*float(inps.res_seconds))
# The ENVI filename of the coarse DEM to be generated
coarse_dem_envi = os.path.join(input_path, "Coarse_" + input_dem_envi)
# Using gdal to down-sample the WGS84 DEM
# cmd = "gdalwarp -t_srs EPSG:4326 -ot Int16 -of ENVI -tap -tr " + str(res_degree) + " " + str(res_degree) + " " + inps.input_dem_vrt + " " + coarse_dem_envi
# os.system(cmd)
ds = gdal.Warp(coarse_dem_envi, inps.input_dem_vrt, options=gdal_opts)
ds = None
# Generating the ISCE xml and vrt of this coarse DEM
gdal2isce_xml(coarse_dem_envi + '.vrt')