def __init__(self, first, second=None):
'''
@param first Raster of the first stage (the state before transition).
@param second Raster of the second stage (the state after transition).
'''
QObject.__init__(self)
if second != None and (not first.geoDataMatch(second)):
raise AreaAnalizerError('Geometries of the rasters are different!')
if first.getBandsCount() != 1:
raise AreaAnalizerError('First raster mast have 1 band!')
if second !=None and second.getBandsCount() != 1:
raise AreaAnalizerError('Second raster mast have 1 band!')
self.geodata = first.getGeodata()
self.categories = first.getBandGradation(1)
if second != None:
self.categoriesSecond = second.getBandGradation(1)
first, second = masks_identity(first.getBand(1), second.getBand(1), dtype=np.uint8)
self.first = first
self.second = second
if second != None:
for cat in self.categoriesSecond:
if cat not in self.categories:
raise AreaAnalizerError("List of categories of the first raster doesn't contains a category of the second raster!")
self.changeMap = None
self.initRaster = None
self.persistentCategoryCode = -1
def __init__(self, band1, band2, expand = False):
"""
@param band1 First band (numpy masked array)
@param band2 Second band (numpy masked array)
@param expand If the param is True, use union of categories of the bands and compute NxN crosstable
"""
QObject.__init__(self)
if not sizes_equal(band1, band2):
raise CrossTabError('Sizes of rasters are not equal!')
band1, band2 = masks_identity(band1, band2, dtype=np.uint8)
self.X = np.ma.compressed(band1).flatten()
self.Y = np.ma.compressed(band2).flatten()
# Compute gradations of the bands
self.graduation_x = get_gradations(self.X)
self.graduation_y = get_gradations(self.Y)
if expand:
self.graduation_x = list(set(self.graduation_x + self.graduation_y))
self.graduation_y = self.graduation_x
rows, cols = len(self.graduation_x), len(self.graduation_y)
self.shape = (rows, cols)
self._T = None # Crosstable
self.n = None # Count of elements in the crosstable
def train(self):
'''
Train the model
'''
self.transitionPotentials = {}
try:
iterCount = len(self.codes)*len(self.factors)
self.rangeChanged.emit(self.tr("Training WoE... %p%"), iterCount)
changeMap = self.changeMap.getBand(1)
for code in self.codes:
sites = binaryzation(changeMap, [code])
# Reclass factors (continuous factor -> ordinal factor)
wMap = np.ma.zeros(changeMap.shape) # The map of summary weight of the all factors
self.weights[code] = {} # Dictionary for storing wheights of every raster's band
for k in xrange(len(self.factors)):
fact = self.factors[k]
self.weights[code][k] = {} # Weights of the factor
factorW = self.weights[code][k]
if self.bins: # Get bins of the factor
bin = self.bins[k]
if (bin != None) and fact.getBandsCount() != len(bin):
raise WoeManagerError("Count of bins list for multiband factor is't equal to band count!")
else: bin = None
for i in range(1, fact.getBandsCount()+1):
band = fact.getBand(i)
if bin and bin[i-1]: #
band = reclass(band, bin[i-1])
band, sites = masks_identity(band, sites, dtype=np.uint8) # Combine masks of the rasters
woeRes = woe(band, sites, self.unit_cell) # WoE for the 'code' (initState->finalState) transition and current 'factor'.
weights = woeRes['map']
wMap = wMap + weights
factorW[i] = woeRes['weights']
self.updateProgress.emit()
# Reclassification finished => set WoE coefficients
self.woe[code]=wMap # WoE for all factors and the transition code.
# Potentials are WoE map rescaled to 0--100 percents
band = (sigmoid(wMap)*100).astype(np.uint8)
p = Raster()
p.create([band], self.geodata)
self.transitionPotentials[code] = p
gc.collect()
except MemoryError:
self.errorReport.emit('The system out of memory during WoE trainig')
raise
except:
self.errorReport.emit(self.tr("An unknown error occurs during WoE trainig"))
raise
finally:
self.processFinished.emit()
def correlation(self):
'''
Define correlation coefficient of the rasters.
'''
x, y = masks_identity(self.X.flatten(), self.Y.flatten())
x, y = np.ma.compressed(x), np.ma.compressed(y)
R = np.corrcoef(x, y)
del x
del y
# function np.corrcoef returns array of coefficients
# R[0][0] = R[1][1] = 1.0 - correlation X--X and Y--Y
# R[0][1] = R[1][0] - correlation X--Y and Y--X
return R[0][1]
def __init__ (self, referenceMap, simulatedMap):
"""
@param referenceMap Reference raster
@param simulatedMap Simulated raster
"""
QObject.__init__(self)
if referenceMap.getBandsCount() + simulatedMap.getBandsCount() !=2:
raise EBError('The reference and simulated rasters must be 1-band rasters!')
if not referenceMap.geoDataMatch(simulatedMap):
raise EBError('Geometries of the reference and simulated rasters are different!')
self.categories = referenceMap.getBandGradation(1)
for s in simulatedMap.getBandGradation(1):
if not s in self.categories:
raise EBError('Categories in the reference and simulated rasters are different!')
R = referenceMap.getBand(1)
S = simulatedMap.getBand(1)
self.shape = R.shape
R, S = masks_identity(R,S, dtype=np.uint8)
# Array for weight
self.W = np.ones(self.shape)
self.W = self.W - np.ma.getmask(R)
R = np.ma.filled(R, 0)
S = np.ma.filled(S, 0)
# Proportion of category j in pixel n at the beginning resolution of the reference map
self.Rj = {}
for j in self.categories:
self.Rj[j] = 1.0*binaryzation(R, [j])
# Proportion of category j in pixel n at the beginning resolution of the simulated map
self.Sj = {}
for j in self.categories:
self.Sj[j] = 1.0*binaryzation(S, [j])
