def test_deg_km_accuracy(self):
c = quakelib.Conversion(quakelib.LatLonDepth(0, 0))
# Check that 360 * length of 1 longitude degree is equal to the circumference of the equator
# Confirm accuracy is within 1 meter
one_deg_len = c.convert2xyz(quakelib.LatLonDepth(0, 1)).mag()
self.assertAlmostEqual(one_deg_len * 360.0 / 1000, 40075.016, 2)
# Check that 4 * length of 90 degree vertical arc is equal to the polar circumference
# Confirm accuracy is within 1 meter
ninety_deg_len = c.convert2xyz(quakelib.LatLonDepth(90, 0)).mag()
self.assertAlmostEqual(ninety_deg_len * 4.0 / 1000, 40007.860, 2)
# Check that inverse of conversion results in the same value
for base_lat in range(-90, 91, 5):
for base_lon in range(-180, 180, 5):
base_pt = quakelib.LatLonDepth(base_lat, base_lon)
conv = quakelib.Conversion(base_pt)
test_lat = math.fmod(base_lat + random.uniform(-45, 45), 90)
test_lon = math.fmod(base_lon + random.uniform(-45, 45), 180)
test_pt = quakelib.LatLonDepth(test_lat, test_lon)
new_xyz = conv.convert2xyz(test_pt)
rev_pt = conv.convert2LatLon(new_xyz)
# Ensure accuracy to within 1e-7 degrees (~1 cm)
self.assertAlmostEqual(test_lat, rev_pt.lat(), 7)
self.assertAlmostEqual(test_lon, rev_pt.lon(), 7)
def test_unit_conversion(self):
c = quakelib.Conversion()
self.assertEqual(c.deg2rad(c.rad2deg(1)), 1)
self.assertEqual(c.year2sec(c.sec2year(1)), 1)
self.assertEqual(c.m2km(c.km2m(1)), 1)
self.assertEqual(c.sqkm2sqm(c.sqm2sqkm(1)), 1)
self.assertEqual(c.pascal2bar(c.bar2pascal(1)), 1)
def test_unit_conversion(self):
c = quakelib.Conversion()
self.assertEqual(c.deg2rad(c.rad2deg(1)), 1)
self.assertAlmostEqual(
c.year2sec(c.sec2year(1)), 1
) # changed to almostEqual since 32-bit floating point can't maintain enough precision
self.assertEqual(c.m2km(c.km2m(1)), 1)
self.assertEqual(c.sqkm2sqm(c.sqm2sqkm(1)), 1)
self.assertEqual(c.pascal2bar(c.bar2pascal(1)), 1)
def __init__(self, min_lat, max_lat, min_lon, max_lon, base_lat, base_lon,
padding, map_res, map_proj):
# These are constrained this way so we can plot on 1024x780 for the
# animations
max_map_width = 690.0
max_map_height = 658.0
#max_map_width = 309.0
#max_map_height = 309.0
# A conversion instance for doing the lat-lon to x-y conversions
self.convert = quakelib.Conversion(base_lat, base_lon)
# Calculate the lat-lon range based on the min-max and the padding
lon_range = max_lon - min_lon
lat_range = max_lat - min_lat
max_range = max((lon_range, lat_range))
self.min_lon = min_lon - lon_range * padding
self.min_lat = min_lat - lat_range * padding
self.max_lon = max_lon + lon_range * padding
self.max_lat = max_lat + lat_range * padding
# We need a map instance to calculate the aspect ratio
map = Basemap(llcrnrlon=self.min_lon,
llcrnrlat=self.min_lat,
urcrnrlon=self.max_lon,
urcrnrlat=self.max_lat,
lat_0=(self.max_lat + self.min_lat) / 2.0,
lon_0=(self.max_lon + self.min_lon) / 2.0,
resolution=map_res,
projection=map_proj,
suppress_ticks=True)
# Using the aspect ratio (h/w) to find the actual map width and height
# in pixels
if map.aspect > max_map_height / max_map_width:
map_height = max_map_height
map_width = max_map_height / map.aspect
else:
map_width = max_map_width
map_height = max_map_width * map.aspect
#print map.aspect, map_width, map_height, max_map_height/max_map_width
self.lons_1d = np.linspace(self.min_lon, self.max_lon, int(map_width))
self.lats_1d = np.linspace(self.min_lat, self.max_lat, int(map_height))
_lons_1d = quakelib.FloatList()
_lats_1d = quakelib.FloatList()
for lon in self.lons_1d:
_lons_1d.append(lon)
for lat in self.lats_1d:
_lats_1d.append(lat)
self.field_1d = self.convert.convertArray2xyz(_lats_1d, _lons_1d)
def calculate_model_extents(self):
#-----------------------------------------------------------------------
# get info from the original file
#-----------------------------------------------------------------------
block_info_table = self.file.root.block_info_table
#-----------------------------------------------------------------------
# calculate the model extents
#-----------------------------------------------------------------------
print 'Calculating model extents'
start_time = time.time()
sys_max_z = -sys.float_info.max
sys_min_z = sys.float_info.max
sys_max_x = -sys.float_info.max
sys_min_x = sys.float_info.max
sys_max_y = -sys.float_info.max
sys_min_y = sys.float_info.max
for block in block_info_table:
min_x = min((block['m_x_pt1'], block['m_x_pt2'], block['m_x_pt3'],
block['m_x_pt4']))
max_x = max((block['m_x_pt1'], block['m_x_pt2'], block['m_x_pt3'],
block['m_x_pt4']))
min_y = min((block['m_y_pt1'], block['m_y_pt2'], block['m_y_pt3'],
block['m_y_pt4']))
max_y = max((block['m_y_pt1'], block['m_y_pt2'], block['m_y_pt3'],
block['m_y_pt4']))
min_z = min((block['m_z_pt1'], block['m_z_pt2'], block['m_z_pt3'],
block['m_z_pt4']))
max_z = max((block['m_z_pt1'], block['m_z_pt2'], block['m_z_pt3'],
block['m_z_pt4']))
if min_x < sys_min_x:
sys_min_x = min_x
if max_x > sys_max_x:
sys_max_x = max_x
if min_y < sys_min_y:
sys_min_y = min_y
if max_y > sys_max_y:
sys_max_y = max_y
if min_z < sys_min_z:
sys_min_z = min_z
if max_z > sys_max_z:
sys_max_z = max_z
base_lat_lon_table = self.file.root.base_lat_lon
conv = quakelib.Conversion(base_lat_lon_table[0],
base_lat_lon_table[1])
ne_corner = conv.convert2LatLon(
quakelib.Vec3(sys_max_x, sys_max_y, 0.0))
sw_corner = conv.convert2LatLon(
quakelib.Vec3(sys_min_x, sys_min_y, 0.0))
self.file.close()
print 'Done! {} seconds'.format(time.time() - start_time)
print 'Creating new tables'
table_start_time = time.time()
self.file = tables.open_file(self.file_path, 'a')
desc = {
'min_x': tables.Float64Col(dflt=0.0),
'max_x': tables.Float64Col(dflt=0.0),
'min_y': tables.Float64Col(dflt=0.0),
'max_y': tables.Float64Col(dflt=0.0),
'min_z': tables.Float64Col(dflt=0.0),
'max_z': tables.Float64Col(dflt=0.0),
'min_lat': tables.Float64Col(dflt=0.0),
'max_lat': tables.Float64Col(dflt=0.0),
'min_lon': tables.Float64Col(dflt=0.0),
'max_lon': tables.Float64Col(dflt=0.0)
}
model_extents = self.file.create_table('/', 'model_extents', desc,
'Model Extents')
model_extents.row.append()
model_extents.flush()
model_extents.cols.min_x[0] = sys_min_x
model_extents.cols.max_x[0] = sys_max_x
model_extents.cols.min_y[0] = sys_min_y
model_extents.cols.max_y[0] = sys_max_y
model_extents.cols.min_z[0] = sys_min_z
model_extents.cols.max_z[0] = sys_max_z
model_extents.cols.min_lat[0] = sw_corner.lat()
model_extents.cols.max_lat[0] = ne_corner.lat()
model_extents.cols.min_lon[0] = sw_corner.lon()
model_extents.cols.max_lon[0] = ne_corner.lon()
print 'Done! {} seconds'.format(time.time() - table_start_time)
#-----------------------------------------------------------------------
# close the file and reopen it with the new table
#-----------------------------------------------------------------------
self.file.close()
self.file = tables.open_file(self.file_path)
print 'Total time {} seconds'.format(time.time() - start_time)
