def findMpasInEezRaw(simplified=False):
for eez in Eez.objects.only('id'):
print 'Eez:', eez.eez
mpas = WdpaPolygon.objects.only('id').filter(geom__relate=(eez.geom, 'T********'))
cursor = connection.cursor()
try:
if (simplified):
try:
cursor.execute("SELECT mpa.id FROM %s as mpa, %s as eez WHERE eez.id = %%s AND ST_Relate(mpa.geom, eez.simple_geom, 'T********')" % (WdpaPolygon._meta.db_table, eez._meta.db_table), [eez.pk])
except:
transaction.rollback_unless_managed()
simplified = False
if (not simplified):
cursor.execute("SELECT mpa.id FROM %s as mpa, %s as eez WHERE eez.id = %%s AND ST_Relate(mpa.geom, eez.geom, 'T********')" % (WdpaPolygon._meta.db_table, eez._meta.db_table), [eez.pk])
for mpaid in [r[0] for r in cursor.fetchall()]:
mpa = WdpaPolygon.objects.get(pk=mpaid)
cursor = connection.cursor()
cursor.execute("SELECT ST_Area(ST_Intersection(mpa.geog, eez.geog), true) AS interarea FROM %s as mpa, %s as eez WHERE mpa.id = %%s AND eez.id = %%s" % (mpa._meta.db_table, eez._meta.db_table), [mpa.pk, eez.pk])
try:
area = cursor.fetchone()[0]
except:
area = None
mpamember = EezMembership(eez=eez, mpa=mpa, area_in_eez=area)
mpamember.save()
transaction.commit_unless_managed()
print mpa.name, ':', area/1000000, "km^2"
except:
transaction.rollback_unless_managed()
def findMpasInEez(simplified=False):
for eez in Eez.objects.only('id'):
print 'Eez:', eez.eez
if (simplified):
mpas = WdpaPolygon.objects.only('id').filter(geom__relate=(eez.simple_geom, 'T********'))
else:
mpas = WdpaPolygon.objects.only('id').filter(geom__relate=(eez.geom, 'T********'))
for mpa in mpas.iterator():
cursor = connection.cursor()
cursor.execute("SELECT ST_Area(ST_Intersection(mpa.geog, eez.geog), true) AS interarea FROM %s as mpa, %s as eez WHERE mpa.id = %%s AND eez.id = %%s" % (mpa._meta.db_table, eez._meta.db_table), [mpa.pk, eez.pk])
try:
area = cursor.fetchone()[0]
except:
area = None
transaction.rollback_unless_managed()
mpamember = EezMembership(eez=eez, mpa=mpa, area_in_eez=area)
mpamember.save()
print mpa.name, ':', area/1000000, "km^2"