wcs = Tan(*[
float(x) for x in [
194.954, 27.980, (W + 1) / 2., (H + 1) /
2., -pixscale, 0, 0, pixscale, W, H
]
])
gri = map_sdss(None,
1,
1,
1,
1,
get_images=True,
wcs=wcs,
forcescale=0,
bestOnly=True)
#print 'Got', gri
g, r, i = gri
print('g', g.shape)
hdr = fitsio.FITSHDR()
wcs.add_to_header(hdr)
fitsio.write('coma-g.fits', g, header=hdr, clobber=True)
fitsio.write('coma-r.fits', r, header=hdr, clobber=True)
fitsio.write('coma-i.fits', i, header=hdr, clobber=True)
bands = 'gri'
rgb = sdss_rgb(gri, bands)
save_jpeg('coma.jpg', rgb)
def run_one(X):
k, sb, bricks, version = X
print(k, sb.brickname)
outfn = 'skybricks/sky-%s.fits.fz' % sb.brickname
if os.path.exists(outfn):
return True
I = np.flatnonzero((bricks.ra2 > sb.ra1) * (bricks.ra1 < sb.ra2) *
(bricks.dec2 > sb.dec1) * (bricks.dec1 < sb.dec2))
if len(I) == 0:
print('No bricks overlap')
return False
# 3600 + 1% margin on each side
w, h = 3672, 3672
if sb.dec >= 78.:
# In order to have fully-overlapping tiles at high Decs, we
# need larger maps. DR9 reaches a max skytile of Dec=+85,
# where the required size is 3724. Add a little margin.
w, h = 3744, 3744
binning = 4
# pixscale
cd = 1. / 3600.
fullw, fullh = w * binning, h * binning
fullcd = cd / binning
# There are really three states: no coverage, blob, no blob.
# Since blobs outside each brick's unique area do not appear in
# the files, we start skyblobs as zero, but also track the
# coverage so we can set !coverage to blob at the end.
skyblobs = np.zeros((fullh, fullw), bool)
covered = np.zeros((fullh, fullw), bool)
skywcs = Tan(sb.ra, sb.dec, (fullw + 1) / 2., (fullh + 1) / 2., -fullcd,
0., 0., fullcd, float(fullw), float(fullh))
for i in I:
brick = bricks[i]
#print('Blob', brickname)
#fn = 'cosmo/data/legacysurvey/dr9/%s/metrics/%s/blobs-%s.fits.gz' % (brick.hemi, brick.brickname[:3], brick.brickname)
#fn = 'dr9-south-blobs/blobs-%s.fits.gz' % (brick.brickname)
fn = '/global/cfs/cdirs/cosmo/data/legacysurvey/dr9/%s/metrics/%s/blobs-%s.fits.gz' % (
brick.hemi, brick.brickname[:3], brick.brickname)
blobs, hdr = fitsio.read(fn, header=True)
wcs = Tan(hdr)
blobs = (blobs > -1)
try:
Yo, Xo, Yi, Xi, _ = resample_with_wcs(skywcs, wcs)
except NoOverlapError:
continue
skyblobs[Yo, Xo] |= blobs[Yi, Xi]
# coverage: nexp > 0 in any band
for band in ['g', 'r', 'z']:
fn = (
'/global/cfs/cdirs/cosmo/data/legacysurvey/dr9/%s/coadd/%s/%s/legacysurvey-%s-nexp-%s.fits.fz'
% (brick.hemi, brick.brickname[:3], brick.brickname,
brick.brickname, band))
if not os.path.exists(fn):
continue
nexp = fitsio.read(fn)
covered[Yo, Xo] |= (nexp[Yi, Xi] > 0)
if not np.any(covered):
print('No coverage')
return False
# No coverage = equivalent to there being a blob there (ie,
# conservative for placing sky fibers)
skyblobs[covered == False] = True
# bin down, counting how many times 'skyblobs' is set
subcount = np.zeros((h, w), np.uint8)
for i in range(binning):
for j in range(binning):
subcount += skyblobs[i::binning, j::binning]
subwcs = Tan(sb.ra, sb.dec, (w + 1) / 2., (h + 1) / 2., -cd, 0., 0., cd,
float(w), float(h))
hdr = fitsio.FITSHDR()
hdr.add_record(
dict(name='SB_VER',
value=version,
comment='desi-sky-locations git version'))
subwcs.add_to_header(hdr)
fitsio.write(outfn,
subcount,
header=hdr,
clobber=True,
compress='GZIP',
tile_dims=(256, 256))
print('Wrote', outfn)
return True
