def build_constellation_boundary_database():
print()
print("Creating constellation boundary database")
db = SkyMapDatabase()
db.drop_table("skymap_constellation_boundaries")
db.create_table(
"skymap_constellation_boundaries",
["ra1", "dec1", "ra2", "dec2"],
[float, float, float, float],
)
# Retrieve data from Vizier
print()
print("Retrieving data from Vizier")
Vizier.ROW_LIMIT = -1
catalog = Vizier.get_catalogs("VI/49")
constbnd = catalog["VI/49/constbnd"]
print()
print("Building edges from {} points".format(len(constbnd)))
prev_hash = None
edges = []
for row in constbnd:
if not row["adj"]:
prev_hash = None
current_hash = point_hash(row["RAB1875"], row["DEB1875"])
if prev_hash is not None:
e = QuickEdge(prev_hash, current_hash)
if e not in edges:
edges.append(e)
prev_hash = current_hash
print()
print("Connecting {} edges".format(len(edges)))
for i, e1 in enumerate(edges):
for e2 in edges[i + 1 :]:
e1.connect(e2)
print()
print("Building extended edges")
new_edges = []
for i, e in enumerate(edges):
new_edge = e.extended_edge
if new_edge not in new_edges:
new_edges.append(new_edge)
print()
print(f"Loading {len(new_edges)} edges to database")
for i, e in enumerate(new_edges):
db.insert_row(
"skymap_constellation_boundaries",
["ra1", "dec1", "ra2", "dec2"],
e.coordinates,
)
def build_constellation_boundary_database():
print
print "Building constellation boundary database"
db = SkyMapDatabase()
db.drop_table("skymap_constellation_boundaries")
db.create_table("skymap_constellation_boundaries",
["ra1", "dec1", "ra2", "dec2"],
[float, float, float, float])
edges = []
rows = db.query("""SELECT * FROM cst_bound_constbnd""")
print "Creating raw edges"
prev_point = None
nrecords = len(rows)
next_id = 1
for i, row in enumerate(rows):
sys.stdout.write("\r{0:.1f}%".format(i * 100.0 / (nrecords - 1)))
sys.stdout.flush()
if not row['adj']:
prev_point = None
ra = 15.0 * row['RAhr']
dec = row['DEdeg']
point = SphericalPoint(ra, dec)
if prev_point is not None:
e = BoundaryEdge(prev_point, point)
if e not in edges:
edges.append(e)
next_id += 1
prev_point = point
print
print "Connecting edges"
n = 0
nrecords = len(edges) * (len(edges) - 1) / 2
for i, e1 in enumerate(edges):
for e2 in edges[i + 1:]:
sys.stdout.write("\r{0:.1f}%".format(n * 100.0 / (nrecords - 1)))
sys.stdout.flush()
n += 1
if e1 == e2:
continue
e1.connect(e2)
print
print "Building extended edges"
new_edges = []
nrecords = len(edges)
for i, e in enumerate(edges):
sys.stdout.write("\r{0:.1f}%".format(i * 100.0 / (nrecords - 1)))
sys.stdout.flush()
new_edge = e.extended_edge
if new_edge not in new_edges:
new_edges.append(new_edge)
print
nrecords = len(new_edges)
print "Loading {} edges to database".format(nrecords)
for i, e in enumerate(new_edges):
sys.stdout.write("\r{0:.1f}%".format(i * 100.0 / (nrecords - 1)))
sys.stdout.flush()
db.insert_row("skymap_constellation_boundaries",
["ra1", "dec1", "ra2", "dec2"],
[e.p1.ra, e.p1.dec, e.p2.ra, e.p2.dec])