def stringToEN(cls, arg):
if not isinstance(arg, str):
raise OSGridError('Grid reference must be a string')
log.debug('Parsing {}', arg)
gridref = arg.strip().upper()
log.debug('gridref is {}', gridref)
match = re.match('^(\d+),\s*(\d+)$', gridref)
if match:
log.debug('Matched pair of numbers')
return [int(x) for x in match.groups()]
match = re.match('^([A-Z]{2})\s*([0-9]+)(\s*)([0-9]+)$', gridref)
if not match:
log.error("Couldn't match expected format")
raise OSGridError('Invalid grid reference')
g = match.groups()
alpha = g[0]
l1 = ord(alpha[0]) - ord('A')
l2 = ord(alpha[1]) - ord('A')
if l1 > 7: l1 -= 1
if l2 > 7: l2 -= 1
e100km = ((l1 - 2) % 5) * 5 + (l2 % 5)
n100km = 19 - 5 * (l1 // 5) - l2 // 5
log.debug("e100k = {}, n100k = {}", e100km, n100km)
if e100km < 0 or e100km > 6 or n100km < 0 or n100km > 12:
log.error("e100k = {}, n100k = {} - OOR", e100km, n100km)
raise OSGridError('Invalid grid reference')
if len(g[2]) == 0:
s = g[1] + g[3]
c = len(s) // 2
en = [s[:c], s[c:]]
else:
en = [g[1], g[3]]
if len(en[0]) != len(en[1]):
log.error('e=*{}* n=*{}* - unequal lengths', *en)
raise OSGridError('Invalid grid reference')
en = [int((x + '00000')[:5]) for x in en]
log.debug('EN is {}', en)
factor = pow(10, 5)
return [en[0] + e100km * factor, en[1] + n100km * factor]
def coordinatesToString(cls, coords):
try:
E = int(coords.E)
N = int(coords.N)
e100k = E // 100000
n100k = N // 100000
if e100k < 0 or e100k > 6 or n100k < 0 or n100k > 12:
log.error("e100k = {}, n100k = {} - OOR", e100k, n100k)
raise OSGridError('Position out of range')
nf = 19 - n100k
ef = 10 + e100k
l1 = nf - (nf % 5) + (ef // 5)
l2 = (5 * nf) % 25 + (ef % 5)
l = [l1, l2]
log.debug("l = {}", l)
rect = ''.join([GridReference.alphabet[int(x)] for x in l])
log.debug("l = {}, rect = {}", l, rect)
e = E % 100000
n = N % 100000
log.debug('e = {}, n = {}', e, n)
return ' '.join([rect, str(e).rjust(5, '0'), str(n).rjust(5, '0')])
except:
traceback.print_exc()
log.debug('{}', traceback.format_exc())
return ''
def outerProduct(cls, left, right=None, n=3):
r = right or left
if len(left) != n or len(r) != n:
raise OSGridError(
'Outer product requires two vectors of length {}'.format(n))
rows = [r * rv for rv in left]
return Matrix(rows, n)
def axis(cls, axis):
try:
axis = axis.upper()
pos = ['X', 'Y', 'Z'].index(axis)
args = [0, 0, 0]
args[pos] = 1
return Vector3(args)
except ValueError:
raise OSGridError('Axis must be X, Y or Z')
def __matmul__(self, other):
if self.nColumns != other.nRows:
raise OSGridError(
'Product requires elements with compatible sizes')
col = other.columns
if len(col) == 1:
c = col[0]
return Vector([row | c for row in self.rows])
else:
return Matrix([[row | c for c in col] for row in self.rows])
def __init__(self, arg):
if isinstance(arg, Matrix):
self.rows = [row[:] for row in arg.rows]
else:
try:
check = all([allNumbers(row) for row in arg])
if not check: raise Exception()
self.rows = [row[:] for row in arg]
except:
raise OSGridError('Constructor requires Matrix or [[numeric]]')
self.nRows = len(self.rows)
if self.nRows == 0:
self.nColumns = 0
else:
self.nColumns = len(self.rows[0])
for row in self.rows:
if len(row) != self.nColumns:
raise OSGridError(
"All rows in array must have same length")
def __init__(self, arg):
if isinstance(arg, Vector):
self.array = arg.array[:]
else:
try:
if not allNumbers(arg): raise Exception()
self.array = arg[:]
except:
raise OSGridError(
'Constructor requires either Vector or [numeric]')
self.nRows = len(self.array)
self.nColumns = 1
def __init__(self, arg, tag='WGS84'):
try:
self.tag = tag
self.datum = Datum.get(tag)
if isinstance(arg, Cartesian):
self.latitude, self.longitude = arg.toLatLong(
self.datum.ellipsoid)
elif isinstance(arg, str):
match1 = re.match(
r'^\s*([+-]?(?:\d*\.)?\d+)([NnSs])\s*,\s*([+-]?(?:\d*\.)?\d+)([EeWw])\s*$',
arg)
match2 = re.match(
r'^\s*([+-]?(?:\d*\.)?\d+)\s*,\s*([+-]?(?:\d*\.)?\d+)\s*$',
arg)
if match1:
lat, ns, long, ew = match1.groups()
lat = float(lat)
long = float(long)
if ns.upper() == 'S': lat = -lat
if ew.upper() == 'W': long = -long
self.latitude, self.longitude = lat, long
elif match2:
self.latitude, self.longitude = [
float(x) for x in match2.groups()
]
else:
raise OSGridError('Cannot parse argument {}'.format(arg))
elif isinstance(arg, list) and areNumbers(arg):
self.latitude, self.longitude = *arg
else:
raise Exception()
except OSGridError as e:
raise e
except:
raise OSGridError(
'Arguments to LatLong constructor must be Cartesian or lat,long'
)
def __init__(self, *args, tag='WGS84'):
if len(args) == 0:
raise OSGridError(
'Initialisation of LatLong requires at least one argument')
self.tag = tag
self.datum = Data[tag]
arg = args[0]
if isinstance(arg, Cartesian):
self.latitude, self.longitude = arg.LatLong(self.datum.ellipsoid)
elif isinstance(arg, str):
match1 = re.match(
r'^\s*([+-]?(?:\d*\.)?\d+)([NnSs])\s*,\s*([+-]?(?:\d*\.)?\d+)([EeWw])\s*$',
arg)
match2 = re.match(
r'^\s*([+-]?(?:\d*\.)?\d+)\s*,\s*([+-]?(?:\d*\.)?\d+)\s*$',
arg)
if match1:
lat, ns, long, ew = match1.groups()
lat = float(lat)
long = float(long)
if ns.upper() == 'S': lat = -lat
if ew.upper() == 'W': long = -long
self.latitude, self.longitude = lat, long
elif match2:
self.latitude, self.longitude = [
float(x) for x in match2.groups()
]
else:
raise OSGridError('Cannot parse argument {}'.format(arg))
elif len(args) >= 2 and areNumbers(args[:2]):
self.latitude, self.longitude = args
else:
OSGridError(
'Arguments to LatLong constructor must be Cartesian or lat,long'
)
def singleAxis(axis, angle):
try:
axis = axis.upper()
pos = ['X', 'Y', 'Z'].index(axis)
i1 = (pos + 1) % 3
i2 = (pos + 2) % 3
sgn = 2 * (pos % 2) - 1
c = cos(angle)
s = sin(angle) * sgn
rows = [[1, 0, 0], [0, 1, 0], [0, 0, 1]]
rows[i1][i1] = c
rows[i1][i2] = s
rows[i2][i2] = c
rows[i2][i1] = -s
return Matrix(rows)
except ValueError:
raise OSGridError('Axis must be X, Y or Z')
def __init__(self,arg):
if isinstance(arg,LatitudeLongitude):
if arg.tag!='OSGB36' :
log.debug("Transforming {} to OSGB36",arg)
arg=arg.transform('OSGB36')
log.debug("Transformed value is {}",arg)
phi=radians(arg.latitude)
l =radians(arg.longitude)
log.debug("phi = {}, l = {}",phi,l)
v=OSDefaultGrid(phi,l)
parsed = v.latLongToGrid()
elif isinstance(arg,list) and areNumbers(arg):
parsed=arg[:2]
elif isinstance(arg,str):
parsed=GridReference.stringToEN(arg)
else:
raise OSGridError('Arguments to OSGridRef constructor must be string, LatLong or E,N')
log.debug('out is {}',parsed)
self.E, self.N = [floor(x) for x in parsed] # [round(x,0) for x in parsed]
log.debug("E = {}, N = {}",self.E,self.N)
def __add__(self, other):
if self.size != other.size:
raise OSGridError('Sum requires elements of same size')
rows = [x + y for (x, y) in zip(self.rows, other.rows)]
return Matrix(rows)
def __setitem__(self, key, value):
if key < 0 or key >= len(self):
raise OSGridError("Index out of range for vector")
self.array[key] = value
def __getitem__(self, key):
if key < 0 or key >= len(self):
raise OSGridError("Index out of range for vector")
return self.array[key]
def __init__(self, *args):
if len(args) == 0:
raise OSGridError(
'Initialisation of OSGRidReference requires at least one argument'
)
arg = args[0]
if isinstance(arg, str):
log.debug('Parsing {}', arg)
gridref = arg.strip().upper()
log.debug('gridref is {}', gridref)
match = re.match('^(\d+),\s*(\d+)$', gridref)
if match:
log.debug('Matched pair of numbers')
return [int(x) for x in match.groups()]
match = re.match('^([A-Z]{2})\s*([0-9]+)(\s*)([0-9]+)$', gridref)
if not match:
log.error("Couldn't match expected format")
raise OSGridError('Invalid grid reference')
g = match.groups()
alpha = g[0]
l1 = ord(alpha[0]) - ord('A')
l2 = ord(alpha[1]) - ord('A')
if l1 > 7: l1 -= 1
if l2 > 7: l2 -= 1
e100km = ((l1 - 2) % 5) * 5 + (l2 % 5)
n100km = 19 - 5 * (l1 // 5) - l2 // 5
log.debug("e100k = {}, n100k = {}", e100km, n100km)
if e100km < 0 or e100km > 6 or n100km < 0 or n100km > 12:
log.error("e100k = {}, n100k = {} - OOR", e100km, n100km)
raise OSGridError('Invalid grid reference')
if len(g[2]) == 0:
s = g[1] + g[3]
c = len(s) // 2
en = [s[:c], s[c:]]
else:
en = [g[1], g[3]]
if len(en[0]) != len(en[1]):
log.error('e=*{}* n=*{}* - unequal lengths', *en)
raise OSGridError('Invalid grid reference')
en = [int((x + '00000')[:5]) for x in en]
log.debug('EN is {}', en)
factor = pow(10, 5)
parsed = [en[0] + e100km * factor, en[1] + n100km * factor]
elif isinstance(arg, LatLong):
if arg.tag != 'OSGB36':
log.debug("Transforming {} to OSGB36", arg)
arg = arg.transform('OSGB36')
log.debug("Transformed value is {}", arg)
phi = radians(arg.latitude)
l = radians(arg.longitude)
log.debug("phi = {}, l = {}", phi, l)
v = OSDefaultGrid(phi, l)
parsed = v.latLongToGrid()
elif len(args) >= 2 and areNumbers(args[:2]):
parsed = args[:2]
else:
raise OSGridError(
'Arguments to OSGridRef constructor must be string or LatLong or E,N'
)
log.debug('out is {}', parsed)
self.E, self.N = [floor(x)
for x in parsed] # [round(x,0) for x in parsed]
log.debug("E = {}, N = {}", self.E, self.N)
