44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
from django.core.management.base import BaseCommand
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from GaiaDBInterface.models import GaiaSource, CatalogFile
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from astropy.coordinates import SkyCoord
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import astropy_healpix as ah
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import numpy as np
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def current_time():
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return (datetime.now() + timedelta(hours=3)).strftime("%H:%M:%S")
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def healpix():
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NSIDE=2048
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ORDER='ring'
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for catalog_file in CatalogFile.objects.all():
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sources = list(catalog_file.sources.all())
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print(f'[{current_time()}] Sources ready. Forming ra & dec arrays...')
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ra_list = np.array([source.ra for source in sources])
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dec_list = np.array([source.dec for source in sources])
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print(f'[{current_time()}] ra & dec arrays ready. Creating SkyCoord objects...')
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skycoord = SkyCoord(ra=ra_list, dec=dec_list, unit='deg', frame='fk5')
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print(f'[{current_time()}] SkyCoord objects ready. Calculating healpix indices...')
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healpix = ah.HEALPix(nside=NSIDE, order=ORDER, frame='fk5')
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healpix_indices = healpix.skycoord_to_healpix(skycoord)
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print(f'[{current_time()}] Indices ready. Assigning indices to source instances...')
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for source, healpix_index in zip(sources, healpix_indices):
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source.healpix_ring_index = healpix_index
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print(f'[{current_time()}] Instances ready. Bulk updating the database...')
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GaiaSource.objects.bulk_update(sources, ['healpix_ring_index'])
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print(f'[{current_time()}] Database updated, sources indexed successfully.')
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class Command(BaseCommand):
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help = 'Index sources using healpix.'
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def handle(self, *args, **options):
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healpix() |