def importArcData(filename):
"""Creates a new Layer from a shapefile (<file>.shp)
:param filename: filename without extension
:type filename: string
:rtype: Layer (CP project)
**Description**
`ESRI <http://www.esri.com/>`_ shapefile is a binary file used to
save and transport maps. During the last times it has become
the most used format for the spatial scientists around the world.
On clusterPy's "data_examples" folder you can find some shapefiles. To
load a shapefile in clusterPy just follow the example bellow.
**Example** ::
import clusterpy
china = clusterpy.importArcData("clusterpy/data_examples/china")
"""
layer = Layer()
layer.name = filename.split('/')[-1]
print "Loading " + filename + ".dbf"
data, fields, specs = importDBF(filename + '.dbf')
print "Loading " + filename + ".shp"
if fields[0] != "ID":
fields = ["ID"] + fields
for y in data.keys():
data[y] = [y] + data[y]
layer.fieldNames = fields
layer.Y = data
layer.areas, layer.Wqueen, layer.Wrook, layer.shpType = importShape(
filename + '.shp')
layer._defBbox()
print "Done"
return layer
def importArcData(filename):
"""Creates a new Layer from a shapefile (<file>.shp)
:param filename: filename without extension
:type filename: string
:rtype: Layer (CP project)
**Description**
`ESRI <http://www.esri.com/>`_ shapefile is a binary file used to
save and transport maps. During the last times it has become
the most used format for the spatial scientists around the world.
On clusterPy's "data_examples" folder you can find some shapefiles. To
load a shapefile in clusterPy just follow the example bellow.
**Example** ::
import clusterpy
china = clusterpy.importArcData("clusterpy/data_examples/china")
"""
layer = Layer()
layer.name = filename.split('/')[-1]
print "Loading " + filename + ".dbf"
data, fields, specs = importDBF(filename + '.dbf')
print "Loading " + filename + ".shp"
if fields[0] != "ID":
fields = ["ID"] + fields
for y in data.keys():
data[y] = [y] + data[y]
layer.fieldNames = fields
layer.Y = data
layer.areas, layer.Wqueen, layer.Wrook, layer.shpType = importShape(filename + '.shp')
layer._defBbox()
print "Done"
return layer
def createGrid(nRows, nCols, lowerLeft=None, upperRight=None):
"""Creates a new Layer with a regular lattice
:param nRows: number of rows
:type nRows: integer
:param nCols: number of columns
:type nCols: integer
:type lowerLeft: tuple or none, lower-left corner coordinates; default is (0,0)
:type upperRight: tuple or none, upper-right corner coordinates; default is (100,100)
:rtype: Layer new lattice
**Description**
Regular lattices are widely used in both theoretical and empirical
applications in Regional Science. The example below shows how easy
the creation of this kind of maps is using clusterPy.
**Examples**
Create a grid of ten by ten points.::
import clusterpy
points = clusterpy.createGrid(10,10)
Create a grid of ten by ten points on the bounding box (0,0,100,100).::
import clusterpy
points = clusterpy.createGrid(10, 10, lowerLeft=(0, 0), upperRight=(100, 100))
"""
print "Creating grid"
if lowerLeft != None and upperRight != None:
ymin = lowerLeft[1]
ymax = upperRight[1]
xmin = lowerLeft[0]
xmax = upperRight[0]
areaHeight = float(ymax - ymin) / nRows
areaWidth = float(xmax - xmin) / nCols
else:
ymin = 0
xmin = 0
xmax = 10 * nCols
ymax = 10 * nRows
areaHeight = 10
areaWidth = 10
nyPoints = nRows
nxPoints = nCols
N = nyPoints * nxPoints
Y = {}
acty = ymax
actx = xmin
map = []
wr = {}
wq = {}
# Creating the wr matrix writh towrer criterium
disAreas = [0, nxPoints - 1, (N - nxPoints), N - 1]
wr[0] = [1, nyPoints]
wr[nxPoints - 1] = [nxPoints - 2, 2 * nxPoints - 1]
wr[N - nxPoints] = [N - nxPoints - nxPoints, N - nxPoints + 1]
wr[N - 1] = [N - 2, N - 1 - nxPoints]
wq[0] = [1, nxPoints, nxPoints + 1]
wq[nxPoints -
1] = [nxPoints - 2, nxPoints + nxPoints - 1, nxPoints + nxPoints - 2]
wq[N - nxPoints] = [
N - nxPoints - nxPoints, N - nxPoints + 1, N - nxPoints - nxPoints + 1
]
wq[N - 1] = [N - 2, N - 1 - nxPoints, N - 1 - nxPoints - 1]
verticalBorderAreas = []
for i in range(1, nxPoints -
1): #Asigning the neighborhood of the corner Areas
wr[i * nxPoints] = [
i * nxPoints - nxPoints, i * nxPoints + 1, i * nxPoints + nxPoints
]
wr[nxPoints * i + nxPoints - 1] = [
nxPoints * i - 1, nxPoints * i + nxPoints - 2,
nxPoints * i + 2 * nxPoints - 1
]
wq[i * nxPoints] = [
i * nxPoints - nxPoints, i * nxPoints - nxPoints + 1,
i * nxPoints + 1, i * nxPoints + nxPoints,
i * nxPoints + nxPoints + 1
]
wq[nxPoints * i + nxPoints - 1] = [
nxPoints * i - 1, nxPoints * i - 2, nxPoints * i + nxPoints - 2,
nxPoints * i + 2 * nxPoints - 1, nxPoints * i + 2 * nxPoints - 2
]
disAreas = disAreas + [i * nxPoints, nxPoints * i + nxPoints - 1]
disAreas = disAreas + range(1, nxPoints - 1) + range(
(N - nxPoints) + 1, N - 1)
for i in range(1, nxPoints -
1): # Asigning the neighborhood of the side Areas
wr[i] = [i - 1, i + nxPoints, i + 1]
wq[i] = [
i - 1, i + nxPoints - 1, i + nxPoints, i + nxPoints + 1, i + 1
]
for i in range((N - nxPoints) + 1, N - 1):
wr[i] = [i - 1, i - nxPoints, i + 1]
wq[i] = [
i - 1, i - nxPoints - 1, i - nxPoints, i - nxPoints + 1, i + 1
]
cont = 0
for i in range(nyPoints): #Creating de clusterPy areas
nexty = acty - areaHeight
for j in range(nxPoints):
nextx = actx + areaWidth
x1 = tuple([actx, acty])
x2 = tuple([nextx, acty])
x3 = tuple([nextx, nexty])
x4 = tuple([actx, nexty])
x5 = tuple([actx, acty])
area = [x1, x2, x3, x4, x5]
map.append([area])
actx = nextx
if cont not in disAreas: # Asigning the rest of the neighborhoods
wr[cont] = [
cont - 1, cont - nxPoints, cont + 1, cont + nxPoints
]
wq[cont] = [
cont - 1, cont - nxPoints - 1, cont - nxPoints,
cont - nxPoints + 1, cont + 1, cont + nxPoints - 1,
cont + nxPoints, cont + nxPoints + 1
]
cont = cont + 1
acty = nexty
actx = xmin
for i in range(N):
Y[i] = [i]
layer = Layer()
layer.Y = Y
layer.fieldNames = ['ID']
layer.areas = map
layer.Wrook = wr
layer.Wqueen = wq
layer.Wqueen, layer.Wrook, = weightsFromAreas(layer.areas)
layer.shpType = 'polygon'
layer.name = 'root'
layer._defBbox()
print "Done"
return layer
def createHexagonalGrid(nRows, nCols, lowerLeft=(0, 0), upperRight=(100, 100)):
"""Creates a new Layer with a hexagonal regular lattice
:param nRows: number of rows
:type nRows: integer
:param nCols: number of columns
:type nCols: integer
:type lowerLeft: tuple or none, lower-left corner coordinates; default is (0,0)
:type upperRight: tuple or none, upper-right corner coordinates; default is (100,100)
:rtype: Layer new lattice
**Description**
Regular lattices are widely used in both theoretical and empirical
applications in Regional Science. The example below shows how easy
the creation of this kind of maps is using clusterPy.
**Examples**
Create a grid of ten by ten points.::
import clusterpy
points = clusterpy.createGrid(10,10)
Create a grid of ten by ten points on the bounding box (0,0,100,100).::
import clusterpy
points = clusterpy.createGrid(10, 10, lowerLeft=(0, 0), upperRight=(100, 100))
"""
print "Creating grid"
rowHeight = (upperRight[1] - lowerLeft[1]) / float(nRows)
colStep = rowHeight / float(2)
N = nRows * nCols
areas = []
for row in range(nRows):
actx = lowerLeft[0]
for col in range(nCols):
if col != 0:
actx += 2 * colStep
if col % 2 == 1:
y0 = lowerLeft[1] + rowHeight * row - 2 * rowHeight / float(2)
y1 = lowerLeft[1] + rowHeight * row - rowHeight / float(2)
y2 = lowerLeft[1] + rowHeight * row
else:
y0 = lowerLeft[1] + rowHeight * row - rowHeight / float(2)
y1 = lowerLeft[1] + rowHeight * row
y2 = lowerLeft[1] + rowHeight * row + rowHeight / float(2)
x0 = actx
x1 = actx + colStep
x2 = actx + 2 * colStep
x3 = actx + 3 * colStep
pol = [(x0, y1), (x1, y2), (x2, y2), (x3, y1), (x2, y0), (x1, y0),
(x0, y1)]
areas.append([pol])
Y = {}
for i in range(N):
Y[i] = [i]
layer = Layer()
layer.Y = Y
layer.fieldNames = ['ID']
layer.areas = areas
layer.Wqueen, layer.Wrook, = weightsFromAreas(layer.areas)
layer.shpType = 'polygon'
layer.name = 'root'
layer._defBbox()
print "Done"
return layer
def createPoints(nRows, nCols, lowerLeft=(0, 0), upperRight=(100, 100)):
"""Creates a new Layer with uniformly distributed points in space
:param nRows: number of rows
:type nRows: integer
:param nCols: number of cols
:type nCols: integer
:param lowerLeft: lower-left corner coordinates; default is (0,0)
:type lowerLeft: tuple or none
:param upperRight: upper-right corner coordinates; default is (100,100)
:type upperRight: tuple or none
:rtype: Layer (new points layer)
**Description**
The example below shows how to create a point-based regular grids with clusterPy.
**Examples**
Creating a grid of ten by ten points.::
import clusterpy
points = clusterpy.createPoints(10, 10)
Creating a grid of ten by ten points on the bounding box (0,0,100,100). ::
import clusterpy
points = clusterpy.createPoints(10, 10, lowerLeft=(0, 0), upperRight=(100, 100))
"""
print "Creating points"
yMin = lowerLeft[1]
yMax = upperRight[1]
xMin = lowerLeft[0]
xMax = upperRight[0]
nyPoints = nRows
nxPoints = nCols
areaHeight = float(yMax - yMin) / nRows
areaWidth = float(xMax - xMin) / nCols
N = nyPoints * nxPoints
Y = {}
acty = yMax
actx = xMin
map = []
verticalBorderAreas = []
cont = 0
for i in range(N):
Y[i] = [i]
for i in range(nyPoints):
nexty = acty - areaHeight
for j in range(nxPoints):
nextx = actx + areaWidth
point = (actx + areaWidth / float(2), acty - areaHeight / float(2))
area = [point]
map.append([area])
actx = nextx
Y[cont].extend([point[0], point[1]])
cont = cont + 1
acty = nexty
actx = xMin
layer = Layer()
layer.Y = Y
layer.fieldNames = ['ID', 'X', 'Y']
layer.areas = map
layer.shpType = 'point'
layer.name = 'root'
layer._defBbox()
print "Done"
return layer
def createGrid(nRows, nCols, lowerLeft=None, upperRight=None):
"""Creates a new Layer with a regular lattice
:param nRows: number of rows
:type nRows: integer
:param nCols: number of columns
:type nCols: integer
:type lowerLeft: tuple or none, lower-left corner coordinates; default is (0,0)
:type upperRight: tuple or none, upper-right corner coordinates; default is (100,100)
:rtype: Layer new lattice
**Description**
Regular lattices are widely used in both theoretical and empirical
applications in Regional Science. The example below shows how easy
the creation of this kind of maps is using clusterPy.
**Examples**
Create a grid of ten by ten points.::
import clusterpy
points = clusterpy.createGrid(10,10)
Create a grid of ten by ten points on the bounding box (0,0,100,100).::
import clusterpy
points = clusterpy.createGrid(10, 10, lowerLeft=(0, 0), upperRight=(100, 100))
"""
print "Creating grid"
if lowerLeft != None and upperRight != None:
ymin = lowerLeft[1]
ymax = upperRight[1]
xmin = lowerLeft[0]
xmax = upperRight[0]
areaHeight = float(ymax - ymin) / nRows
areaWidth = float(xmax - xmin) / nCols
else:
ymin = 0
xmin = 0
xmax = 10*nCols
ymax = 10*nRows
areaHeight = 10
areaWidth = 10
nyPoints = nRows
nxPoints = nCols
N = nyPoints*nxPoints
Y = {}
acty = ymax
actx = xmin
map = []
wr = {}
wq = {}
# Creating the wr matrix writh towrer criterium
disAreas = [0, nxPoints - 1, (N-nxPoints), N - 1]
wr[0] = [1, nyPoints]
wr[nxPoints - 1] = [nxPoints - 2, 2 * nxPoints - 1]
wr[N - nxPoints] = [N - nxPoints - nxPoints, N - nxPoints + 1]
wr[N - 1] = [N - 2, N - 1 - nxPoints]
wq[0] = [1, nxPoints, nxPoints + 1]
wq[nxPoints - 1] = [nxPoints - 2, nxPoints + nxPoints - 1,
nxPoints + nxPoints - 2]
wq[N - nxPoints] = [N - nxPoints - nxPoints, N - nxPoints + 1,
N - nxPoints - nxPoints + 1]
wq[N - 1] = [N - 2, N - 1 - nxPoints, N - 1 - nxPoints - 1]
verticalBorderAreas = []
for i in range(1, nxPoints - 1): #Asigning the neighborhood of the corner Areas
wr[i * nxPoints] = [i * nxPoints - nxPoints, i * nxPoints + 1,
i * nxPoints + nxPoints]
wr[nxPoints * i + nxPoints - 1] = [nxPoints * i - 1,
nxPoints * i + nxPoints - 2, nxPoints * i + 2 * nxPoints - 1]
wq[i * nxPoints] = [i * nxPoints - nxPoints, i * nxPoints - nxPoints + 1,
i * nxPoints + 1,i * nxPoints + nxPoints, i * nxPoints + nxPoints + 1]
wq[nxPoints * i + nxPoints - 1] = [nxPoints * i - 1, nxPoints * i - 2,
nxPoints * i + nxPoints - 2, nxPoints * i + 2 * nxPoints - 1,
nxPoints * i + 2 * nxPoints - 2]
disAreas = disAreas + [i * nxPoints, nxPoints * i + nxPoints - 1]
disAreas = disAreas + range(1, nxPoints - 1) + range((N - nxPoints) + 1, N - 1)
for i in range(1, nxPoints - 1): # Asigning the neighborhood of the side Areas
wr[i]=[i - 1, i + nxPoints, i + 1]
wq[i]=[i - 1, i + nxPoints - 1, i + nxPoints, i + nxPoints + 1, i + 1]
for i in range((N - nxPoints) + 1, N - 1):
wr[i]=[i - 1, i - nxPoints, i + 1]
wq[i]=[i - 1, i - nxPoints - 1, i - nxPoints, i - nxPoints + 1, i + 1]
cont = 0
for i in range(nyPoints): #Creating de clusterPy areas
nexty = acty - areaHeight
for j in range(nxPoints):
nextx = actx + areaWidth
x1 = tuple([actx, acty])
x2 = tuple([nextx, acty])
x3 = tuple([nextx, nexty])
x4 = tuple([actx, nexty])
x5 = tuple([actx, acty])
area = [x1, x2, x3, x4, x5]
map.append([area])
actx = nextx
if cont not in disAreas: # Asigning the rest of the neighborhoods
wr[cont]=[cont - 1, cont - nxPoints, cont + 1, cont + nxPoints]
wq[cont]=[cont - 1, cont - nxPoints - 1, cont - nxPoints,
cont - nxPoints + 1, cont + 1, cont + nxPoints - 1,
cont + nxPoints, cont + nxPoints + 1]
cont = cont + 1
acty = nexty
actx = xmin
for i in range(N):
Y[i]=[i]
layer = Layer()
layer.Y = Y
layer.fieldNames = ['ID']
layer.areas = map
layer.Wrook = wr
layer.Wqueen = wq
layer.Wqueen, layer.Wrook, = weightsFromAreas(layer.areas)
layer.shpType = 'polygon'
layer.name = 'root'
layer._defBbox()
print "Done"
return layer
def createHexagonalGrid(nRows, nCols, lowerLeft=(0,0), upperRight=(100,100)):
"""Creates a new Layer with a hexagonal regular lattice
:param nRows: number of rows
:type nRows: integer
:param nCols: number of columns
:type nCols: integer
:type lowerLeft: tuple or none, lower-left corner coordinates; default is (0,0)
:type upperRight: tuple or none, upper-right corner coordinates; default is (100,100)
:rtype: Layer new lattice
**Description**
Regular lattices are widely used in both theoretical and empirical
applications in Regional Science. The example below shows how easy
the creation of this kind of maps is using clusterPy.
**Examples**
Create a grid of ten by ten points.::
import clusterpy
points = clusterpy.createGrid(10,10)
Create a grid of ten by ten points on the bounding box (0,0,100,100).::
import clusterpy
points = clusterpy.createGrid(10, 10, lowerLeft=(0, 0), upperRight=(100, 100))
"""
print "Creating grid"
rowHeight = (upperRight[1] - lowerLeft[1])/float(nRows)
colStep = rowHeight/float(2)
N = nRows*nCols
areas = []
for row in range(nRows):
actx = lowerLeft[0]
for col in range(nCols):
if col != 0:
actx += 2*colStep
if col%2 == 1:
y0 = lowerLeft[1] + rowHeight*row - 2*rowHeight/float(2)
y1 = lowerLeft[1] + rowHeight*row - rowHeight/float(2)
y2 = lowerLeft[1] + rowHeight*row
else:
y0 = lowerLeft[1] + rowHeight*row - rowHeight/float(2)
y1 = lowerLeft[1] + rowHeight*row
y2 = lowerLeft[1] + rowHeight*row + rowHeight/float(2)
x0 = actx
x1 = actx + colStep
x2 = actx + 2*colStep
x3 = actx + 3*colStep
pol = [(x0,y1),(x1,y2),(x2,y2),
(x3,y1),(x2,y0),(x1,y0),
(x0,y1)]
areas.append([pol])
Y = {}
for i in range(N):
Y[i]=[i]
layer = Layer()
layer.Y = Y
layer.fieldNames = ['ID']
layer.areas = areas
layer.Wqueen, layer.Wrook, = weightsFromAreas(layer.areas)
layer.shpType = 'polygon'
layer.name = 'root'
layer._defBbox()
print "Done"
return layer
def createPoints(nRows, nCols, lowerLeft=(0,0), upperRight=(100,100)):
"""Creates a new Layer with uniformly distributed points in space
:param nRows: number of rows
:type nRows: integer
:param nCols: number of cols
:type nCols: integer
:param lowerLeft: lower-left corner coordinates; default is (0,0)
:type lowerLeft: tuple or none
:param upperRight: upper-right corner coordinates; default is (100,100)
:type upperRight: tuple or none
:rtype: Layer (new points layer)
**Description**
The example below shows how to create a point-based regular grids with clusterPy.
**Examples**
Creating a grid of ten by ten points.::
import clusterpy
points = clusterpy.createPoints(10, 10)
Creating a grid of ten by ten points on the bounding box (0,0,100,100). ::
import clusterpy
points = clusterpy.createPoints(10, 10, lowerLeft=(0, 0), upperRight=(100, 100))
"""
print "Creating points"
yMin = lowerLeft[1]
yMax = upperRight[1]
xMin = lowerLeft[0]
xMax = upperRight[0]
nyPoints = nRows
nxPoints = nCols
areaHeight = float(yMax - yMin) / nRows
areaWidth = float(xMax - xMin) / nCols
N = nyPoints*nxPoints
Y = {}
acty = yMax
actx = xMin
map = []
verticalBorderAreas = []
cont = 0
for i in range(N):
Y[i] = [i]
for i in range(nyPoints):
nexty = acty - areaHeight
for j in range(nxPoints):
nextx = actx + areaWidth
point = (actx + areaWidth / float(2), acty - areaHeight / float(2))
area = [point]
map.append([area])
actx = nextx
Y[cont].extend([point[0],point[1]])
cont = cont + 1
acty = nexty
actx = xMin
layer = Layer()
layer.Y = Y
layer.fieldNames = ['ID','X','Y']
layer.areas = map
layer.shpType = 'point'
layer.name = 'root'
layer._defBbox()
print "Done"
return layer