class TrailsLayer(BaseLayer):
def __init__(self):
self.data = read_csv('data/taxi.csv')
self.cmap = colorbrewer(self.data['taxi_id'], alpha=220)
self.t = self.data['timestamp'].min()
self.painter = BatchPainter()
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter = BatchPainter()
df = self.data.where((self.data['timestamp'] > self.t)
& (self.data['timestamp'] <= self.t + 15 * 60))
for taxi_id in set(df['taxi_id']):
grp = df.where(df['taxi_id'] == taxi_id)
self.painter.set_color(self.cmap[taxi_id])
x, y = proj.lonlat_to_screen(grp['lon'], grp['lat'])
self.painter.points(x, y, 10)
self.t += 2 * 60
if self.t > self.data['timestamp'].max():
self.t = self.data['timestamp'].min()
self.painter.batch_draw()
ui_manager.info(epoch_to_str(self.t))
def bbox(self):
return BoundingBox(north=40.110222,
west=115.924463,
south=39.705711,
east=116.803369)
class TrailsLayer(BaseLayer):
def __init__(self):
self.data = read_csv('data/taxi.csv')
self.cmap = colorbrewer(self.data['taxi_id'], alpha=220)
self.t = self.data['timestamp'].min()
self.painter = BatchPainter()
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter = BatchPainter()
df = self.data.where((self.data['timestamp'] > self.t) & (self.data['timestamp'] <= self.t + 15*60))
for taxi_id in set(df['taxi_id']):
grp = df.where(df['taxi_id'] == taxi_id)
self.painter.set_color(self.cmap[taxi_id])
x, y = proj.lonlat_to_screen(grp['lon'], grp['lat'])
self.painter.points(x, y, 10)
self.t += 2*60
if self.t > self.data['timestamp'].max():
self.t = self.data['timestamp'].min()
self.painter.batch_draw()
ui_manager.info(epoch_to_str(self.t))
def bbox(self):
return BoundingBox(north=40.110222, west=115.924463, south=39.705711, east=116.803369)
class KMeansLayer(BaseLayer):
def __init__(self, data):
self.data = data
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
k_means = KMeans()
k_means.fit(np.vstack([x,y]).T)
labels = k_means.labels_
self.cmap = create_set_cmap(set(labels), 'hsv')
for l in set(labels):
try:
self.painter.set_color(self.cmap[l])
self.painter.convexhull(x[labels == l], y[labels == l])
self.painter.points(x[labels == l], y[labels == l], 2)
except Exception:
print '=============',l,'=============='
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
def on_key_release(self, key, modifiers):
return False
class ConvexHullLayer(BaseLayer):
def __init__(self, data, col, fill=True, point_size=4):
"""
Convex hull for a set of points
:param data: points
:param col: color
:param fill: whether to fill the convexhull polygon or not
:param point_size: size of the points on the convexhull. Points are not rendered if None
"""
self.data = data
self.col = col
self.fill = fill
self.point_size = point_size
def invalidate(self, proj):
self.painter = BatchPainter()
self.painter.set_color(self.col)
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
if len(x) >= 3:
self.painter.convexhull(x, y, self.fill)
else:
self.painter.linestrip(x, y)
if self.point_size > 0:
self.painter.points(x, y, self.point_size)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
class KMeansLayer(BaseLayer):
def __init__(self, data):
self.data = data
self.k = 2
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
k_means = KMeans(n_clusters=self.k)
k_means.fit(np.vstack([x,y]).T)
labels = k_means.labels_
self.cmap = create_set_cmap(set(labels), 'hsv')
for l in set(labels):
self.painter.set_color(self.cmap[l])
self.painter.convexhull(x[labels == l], y[labels == l])
self.painter.points(x[labels == l], y[labels == l], 2)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
ui_manager.info('Use left and right to increase/decrease the number of clusters. k = %d' % self.k)
self.painter.batch_draw()
def on_key_release(self, key, modifiers):
if key == pyglet.window.key.LEFT:
self.k = max(2,self.k - 1)
return True
elif key == pyglet.window.key.RIGHT:
self.k = self.k + 1
return True
return False
class TrailsLayer(BaseLayer):
def __init__(self):
self.data = read_csv('SLOCs.csv')
self.cmap = colorbrewer(self.data['name'], alpha=220)
self.t = self.data['timestamp'].min()
self.painter = BatchPainter()
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter = BatchPainter()
df = self.data.where((self.data['timestamp'] > self.t) & (self.data['timestamp'] <= self.t + 24*3600)) #set minimum time interval
for name in set(df['name']):
grp = df.where(df['name'] == name)
self.painter.set_color('blue') #set color, default: self.cmap[name]
x0, y0 = proj.lonlat_to_screen(grp['Slon'], grp['Slat'])
x1, y1 = proj.lonlat_to_screen(grp['Flon'], grp['Flat'])
self.painter.points(x0, y0, 3)
self.painter.lines(x0,y0,x1,y1,width=3)
self.t += 24*3600 #set animation step size
if self.t > self.data['timestamp'].max():
self.t = self.data['timestamp'].min()
self.painter.batch_draw()
ui_manager.info(epoch_to_str(self.t))
def bbox(self):
return BoundingBox(north=9, west=110, south=1, east=95) #set boundingbox
class TrailsLayer(BaseLayer):
def __init__(self):
self.data = read_csv('alex.csv')
self.cmap = colorbrewer(self.data['runner_id'], alpha=220)
self.t = self.data['timestamp'].min()
self.painter = BatchPainter()
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter = BatchPainter()
df = self.data.where((self.data['timestamp'] > self.t)
& (self.data['timestamp'] <= self.t + 15 * 60))
for taxi_id in set(df['runner_id']):
grp = df.where(df['runner_id'] == taxi_id)
self.painter.set_color(self.cmap[taxi_id])
x, y = proj.lonlat_to_screen(grp['lon'], grp['lat'])
self.painter.points(x, y, 10)
self.t += 2 * 60
if self.t > self.data['timestamp'].max():
self.t = self.data['timestamp'].min()
self.painter.batch_draw()
ui_manager.info(epoch_to_str(self.t))
# this should get modified as well moving forward
def bbox(self):
return BoundingBox(north=37.801421,
west=-122.517339,
south=37.730097,
east=-122.424474)
class ConvexHullLayer(BaseLayer):
def __init__(self, data, col, fill=True, point_size=4):
"""
Convex hull for a set of points
:param data: points
:param col: color
:param fill: whether to fill the convexhull polygon or not
:param point_size: size of the points on the convexhull. Points are not rendered if None
"""
self.data = data
self.col = col
self.fill = fill
self.point_size=point_size
def invalidate(self, proj):
self.painter = BatchPainter()
self.painter.set_color(self.col)
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
if len(x) >= 3:
self.painter.convexhull(x, y, self.fill)
else:
self.painter.linestrip(x, y)
if self.point_size > 0:
self.painter.points(x, y, self.point_size)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
class KMeansLayer(BaseLayer):
def __init__(self, data):
self.data = data
self.k = 2
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
k_means = KMeans(n_clusters=self.k)
k_means.fit(np.vstack([x, y]).T)
labels = k_means.labels_
self.cmap = create_set_cmap(set(labels), 'hsv')
for l in set(labels):
self.painter.set_color(self.cmap[l])
self.painter.convexhull(x[labels == l], y[labels == l])
self.painter.points(x[labels == l], y[labels == l], 2)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
ui_manager.info(
'Use left and right to increase/decrease the number of clusters. k = %d'
% self.k)
self.painter.batch_draw()
def on_key_release(self, key, modifiers):
if key == pyglet.window.key.LEFT:
self.k = max(2, self.k - 1)
return True
elif key == pyglet.window.key.RIGHT:
self.k = self.k + 1
return True
return False
class GraphLayer(BaseLayer):
def __init__(self, data, src_lat, src_lon, dest_lat, dest_lon, linewidth=1, alpha=220, color='hot'):
"""Create a graph drawing a line between each pair of (src_lat, src_lon) and (dest_lat, dest_lon)
:param data: data access object
:param src_lat: field name of source latitude
:param src_lon: field name of source longitude
:param dest_lat: field name of destination latitude
:param dest_lon: field name of destination longitude
:param linewidth: line width
:param alpha: color alpha
:param color: color or colormap
"""
self.data = data
self.src_lon = src_lon
self.src_lat = src_lat
self.dest_lon = dest_lon
self.dest_lat = dest_lat
self.linewidth = linewidth
alpha = alpha
self.color = color
if type(self.color) == str:
self.cmap = colors.ColorMap(self.color, alpha)
def invalidate(self, proj):
self.painter = BatchPainter()
x0, y0 = proj.lonlat_to_screen(self.data[self.src_lon], self.data[self.src_lat])
x1, y1 = proj.lonlat_to_screen(self.data[self.dest_lon], self.data[self.dest_lat])
if type(self.color) == list:
self.painter.set_color(self.color)
self.painter.lines(x0, y0, x1, y1, width=self.linewidth)
else:
manhattan = np.abs(x0-x1) + np.abs(y0-y1)
vmax = manhattan.max()
distances = np.logspace(0, log10(manhattan.max()), 20)
for i in range(len(distances)-1, 1, -1):
mask = (manhattan > distances[i-1]) & (manhattan <= distances[i])
self.painter.set_color(self.cmap.to_color(distances[i], vmax, 'log'))
self.painter.lines(x0[mask], y0[mask], x1[mask], y1[mask], width=self.linewidth)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
def bbox(self):
return BoundingBox.from_points(lons=np.hstack([self.data[self.src_lon], self.data[self.dest_lon]]),
lats=np.hstack([self.data[self.src_lat], self.data[self.dest_lat]]))
class DotDensityLayer(BaseLayer):
def __init__(self, data, color=None, point_size=2, f_tooltip=None):
"""Create a dot density map
:param data: data access object
:param color: color
:param point_size: point size
:param f_tooltip: function to return a tooltip string for a point
"""
self.frame_counter = 0
self.data = data
self.color = color
if self.color is None:
self.color = [255,0,0]
self.point_size = point_size
self.f_tooltip = f_tooltip
self.hotspots = HotspotManager()
def invalidate(self, proj):
self.x, self.y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
if self.f_tooltip:
for i in range(0, len(x)):
record = {k: self.data[k][i] for k in self.data.keys()}
self.hotspots.add_rect(x[i] - self.point_size, y[i] - self.point_size,
2*self.point_size, 2*self.point_size,
self.f_tooltip(record))
self.color= "blue" #random.choice(foo)
self.painter.set_color(self.color)
self.painter.points(x[self.frame_counter], y[self.frame_counter], 2*self.point_size, False)
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
self.frame_counter += 1
time.sleep(0.4)
if self.frame_counter == len(x):
self.frame_counter = 0
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'], lats=self.data['lat'])
class PointsLayer(BaseLayer):
def __init__(self, data, color, point_size):
self.data = data
self.color = color
self.point_size = point_size
def invalidate(self, proj):
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
self.painter = BatchPainter()
self.painter.set_color(self.color)
self.painter.points(x, y, point_size=self.point_size, rounded=True)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
class LabelsLayer(BaseLayer):
def __init__(self,
data,
label_column,
color=None,
font_name=FONT_NAME,
font_size=14,
anchor_x='left',
anchor_y='top'):
"""Create a layer with a text label for each sample
:param data: data access object
:param label_column: column in the data access object where the labels text is stored
:param color: color
:param font_name: font name
:param font_size: font size
:param anchor_x: anchor x
:param anchor_y: anchor y
"""
self.data = data
self.label_column = label_column
self.color = color
self.font_name = font_name
self.font_size = font_size
self.anchor_x = anchor_x
self.anchor_y = anchor_y
if self.color is None:
self.color = [255, 0, 0]
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
self.painter.set_color(self.color)
self.painter.labels(x,
y,
self.data[self.label_column],
font_name=self.font_name,
font_size=self.font_size,
anchor_x=self.anchor_x,
anchor_y=self.anchor_y)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'],
lats=self.data['lat'])
class QuadsLayer(BaseLayer):
def __init__(self, data, cmap='hot_r'):
self.data = data
if cmap is not None:
self.cmap = geoplotlib.colors.ColorMap(cmap, alpha=196)
else:
self.cmap = None
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
w = x.max() - x.min()
h = y.max() - y.min()
w = np.ceil(w / 2) * 2
h = np.ceil(h / 2) * 2
l = max(w, h)
root = QuadTree(x.min(), x.min() + l, y.min() + l, y.min())
maxarea = (root.right - root.left) * (root.top - root.bottom)
queue = [root]
done = []
while len(queue) > 0:
qt = queue.pop()
if qt.can_split(x, y):
queue.extend(qt.split())
else:
done.append(qt)
print len(queue), len(done)
if self.cmap is not None:
for qt in done:
area = (qt.right - qt.left) * (qt.top - qt.bottom)
self.painter.set_color(self.cmap.to_color(1 + area, 1 + maxarea, 'log'))
self.painter.rect(qt.left, qt.top, qt.right, qt.bottom)
else:
for qt in done:
self.painter.linestrip([qt.left, qt.right, qt.right, qt.left],
[qt.top, qt.top, qt.bottom, qt.bottom], closed=True)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
class QuadsLayer(BaseLayer):
def __init__(self, data, cmap='hot_r'):
self.data = data
if cmap is not None:
self.cmap = geoplotlib.colors.ColorMap(cmap, alpha=196)
else:
self.cmap = None
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
w = x.max() - x.min()
h = y.max() - y.min()
w = np.ceil(w / 2) * 2
h = np.ceil(h / 2) * 2
l = max(w, h)
root = QuadTree(x.min(), x.min() + l, y.min() + l, y.min())
maxarea = (root.right - root.left) * (root.top - root.bottom)
queue = [root]
done = []
while len(queue) > 0:
qt = queue.pop()
if qt.can_split(x, y):
queue.extend(qt.split())
else:
done.append(qt)
print((len(queue), len(done)))
if self.cmap is not None:
for qt in done:
area = (qt.right - qt.left) * (qt.top - qt.bottom)
self.painter.set_color(
self.cmap.to_color(1 + area, 1 + maxarea, 'log'))
self.painter.rect(qt.left, qt.top, qt.right, qt.bottom)
else:
for qt in done:
self.painter.linestrip([qt.left, qt.right, qt.right, qt.left],
[qt.top, qt.top, qt.bottom, qt.bottom],
closed=True)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
class DotDensityLayer(BaseLayer):
def __init__(self, data, color=None, point_size=2, f_tooltip=None):
"""Create a dot density map
:param data: data access object
:param color: color
:param point_size: point size
:param f_tooltip: function to return a tooltip string for a point
"""
self.data = data
self.color = color
if self.color is None:
self.color = [255,0,0]
self.point_size = point_size
self.f_tooltip = f_tooltip
self.hotspots = HotspotManager()
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
if self.f_tooltip:
for i in range(0, len(x)):
record = {k: self.data[k][i] for k in self.data.keys()}
self.hotspots.add_rect(x[i] - self.point_size, y[i] - self.point_size,
2*self.point_size, 2*self.point_size,
self.f_tooltip(record))
self.painter.set_color(self.color)
self.painter.points(x, y, 2*self.point_size, False)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'], lats=self.data['lat'])
class LabelsLayer(BaseLayer):
def __init__(self, data, label_column, color=None, font_name=FONT_NAME, font_size=14, anchor_x='left', anchor_y='top'):
"""Create a layer with a text label for each sample
:param data: data access object
:param label_column: column in the data access object where the labels text is stored
:param color: color
:param font_name: font name
:param font_size: font size
:param anchor_x: anchor x
:param anchor_y: anchor y
"""
self.data = data
self.label_column = label_column
self.color = color
self.font_name = font_name
self.font_size = font_size
self.anchor_x = anchor_x
self.anchor_y = anchor_y
if self.color is None:
self.color = [255,0,0]
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
self.painter.set_color(self.color)
self.painter.labels(x, y, self.data[self.label_column],
font_name=self.font_name,
font_size=self.font_size,
anchor_x=self.anchor_x,
anchor_y=self.anchor_y)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'], lats=self.data['lat'])
class TrailsLayer(BaseLayer):
def __init__(self):
self.data = read_csv('data/taxi.csv')
self.data = self.data.where(self.data['taxi_id'] == list(set(self.data['taxi_id']))[2])
self.t = self.data['timestamp'].min()
self.painter = BatchPainter()
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter = BatchPainter()
self.painter.set_color([0,0,255])
df = self.data.where((self.data['timestamp'] > self.t) & (self.data['timestamp'] <= self.t + 30*60))
proj.fit(BoundingBox.from_points(lons=df['lon'], lats=df['lat']), max_zoom=14)
x, y = proj.lonlat_to_screen(df['lon'], df['lat'])
self.painter.linestrip(x, y, 10)
self.t += 30
if self.t > self.data['timestamp'].max():
self.t = self.data['timestamp'].min()
self.painter.batch_draw()
ui_manager.info(epoch_to_str(self.t))
class AnimatedProcess(BaseLayer):
def __init__(self, network, edgelists, show_addresses=False, save_frames=False, line_width=1.3):
# Set network and edge lists.
self.network = network
self.edgelists = edgelists
self.num_frames = len(self.edgelists)
# Set flag specifying whether to show addresses.
self.show_addresses = show_addresses
# Set flag specifying whether to save frames.
self.save_frames = save_frames
# Set line width.
self.line_width = line_width
# Initialize state counter.
self.count = 0
# Initialize geolocator for retrieving addresses.
geolocator = Nominatim(user_agent='test')
# Set coordinates of nodes and get addresses.
self.node_coordinates = np.empty((2, network.number_of_nodes()), dtype=float)
self.node_addresses = []
for idx, node in enumerate(network.nodes()):
self.node_coordinates[:, idx] = np.array(self.network.nodes[node]['latlon'])
if self.show_addresses:
address = geolocator.reverse(self.node_coordinates[:, idx]).address
self.node_addresses.append(address[:address.index(',', address.index(',') + 1)])
def invalidate(self, proj):
self.x, self.y = proj.lonlat_to_screen(self.node_coordinates[1, :], self.node_coordinates[0, :])
def draw(self, proj, mouse_x, mouse_y, ui_manager):
# Prepare edges for next frame.
self.edge_src = np.empty((2, len(self.edgelists[self.count])), dtype=float)
self.edge_dst = np.empty((2, len(self.edgelists[self.count])), dtype=float)
for idx, edge in enumerate(self.edgelists[self.count]):
self.edge_src[:, idx] = self.network.nodes[edge[0]]['latlon']
self.edge_dst[:, idx] = self.network.nodes[edge[1]]['latlon']
self.edge_src_trans_x, self.edge_src_trans_y = proj.lonlat_to_screen(self.edge_src[1, :], self.edge_src[0, :])
self.edge_dst_trans_x, self.edge_dst_trans_y = proj.lonlat_to_screen(self.edge_dst[1, :], self.edge_dst[0, :])
# Initialize painter, plot nodes and addresses.
self.painter = BatchPainter()
self.painter.points(self.x, self.y, point_size=10, rounded=True)
if self.show_addresses:
self.painter.labels(self.x, self.y, self.node_addresses, font_size=10, anchor_x='left')
# Plot edges.
self.painter.set_color([255, 0, 0])
self.painter.lines(self.edge_src_trans_x, self.edge_src_trans_y, self.edge_dst_trans_x, self.edge_dst_trans_y, width=self.line_width)
# Draw and increment counter.
self.painter.batch_draw()
if self.count < len(self.edgelists) - 1:
self.count += 1
self.count = self.count % self.num_frames
print("count: {0}/{1}".format(self.count, self.num_frames))
# If saving frames.
if self.save_frames:
GeoplotlibApp.screenshot(f'./results/animation_frames/{self.count}.png')
class GeoJSONLayer(BaseLayer):
def __init__(self,
geojson_or_fname,
color='b',
linewidth=1,
fill=False,
f_tooltip=None):
self.color = color
self.linewidth = linewidth
self.fill = fill
self.f_tooltip = f_tooltip
if type(geojson_or_fname) == str:
with open(geojson_or_fname) as fin:
self.data = json.load(fin)
elif type(geojson_or_fname) == dict:
self.data = geojson_or_fname
else:
raise Exception('must provide either dict or filename')
self.boundingbox = None
for feature in self.data['features']:
if feature['geometry']['type'] == 'Polygon':
for poly in feature['geometry']['coordinates']:
poly = np.array(poly)
self.__update_bbox(poly[:, 0], poly[:, 1])
elif feature['geometry']['type'] == 'MultiPolygon':
for multipoly in feature['geometry']['coordinates']:
for poly in multipoly:
poly = np.array(poly)
self.__update_bbox(poly[:, 0], poly[:, 1])
elif feature['geometry']['type'] == 'Point':
lon, lat = feature['geometry']['coordinates']
self.__update_bbox(np.array([lon]), np.array([lat]))
elif feature['geometry']['type'] == 'LineString':
line = np.array(feature['geometry']['coordinates'])
self.__update_bbox(line[:, 0], line[:, 1])
def __update_bbox(self, lon, lat):
if self.boundingbox is None:
self.boundingbox = BoundingBox(north=lat.max(),
south=lat.min(),
west=lon.min(),
east=lon.max())
else:
self.boundingbox = BoundingBox(north=max(self.boundingbox.north,
lat.max()),
south=min(self.boundingbox.south,
lat.min()),
west=min(self.boundingbox.west,
lon.min()),
east=max(self.boundingbox.east,
lon.max()))
def invalidate(self, proj):
self.painter = BatchPainter()
self.hotspots = HotspotManager()
for feature in self.data['features']:
if isfunction(self.color):
self.painter.set_color(self.color(feature['properties']))
else:
self.painter.set_color(self.color)
if feature['geometry']['type'] == 'Polygon':
for poly in feature['geometry']['coordinates']:
poly = np.array(poly)
x, y = proj.lonlat_to_screen(poly[:, 0], poly[:, 1])
if self.fill:
self.painter.poly(x, y)
else:
self.painter.linestrip(x,
y,
self.linewidth,
closed=True)
if self.f_tooltip:
self.hotspots.add_poly(
x, y, self.f_tooltip(feature['properties']))
elif feature['geometry']['type'] == 'MultiPolygon':
for multipoly in feature['geometry']['coordinates']:
for poly in multipoly:
poly = np.array(poly)
x, y = proj.lonlat_to_screen(poly[:, 0], poly[:, 1])
if self.fill:
self.painter.poly(x, y)
else:
self.painter.linestrip(x,
y,
self.linewidth,
closed=True)
if self.f_tooltip:
self.hotspots.add_poly(
x, y, self.f_tooltip(feature['properties']))
elif feature['geometry']['type'] == 'Point':
lon, lat = feature['geometry']['coordinates']
x, y = proj.lonlat_to_screen(np.array([lon]), np.array([lat]))
self.painter.points(x, y)
elif feature['geometry']['type'] == 'LineString':
line = np.array(feature['geometry']['coordinates'])
x, y = proj.lonlat_to_screen(line[:, 0], line[:, 1])
self.painter.linestrip(x, y, self.linewidth, closed=False)
else:
print(('unknow geometry %s' % feature['geometry']['type']))
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
def bbox(self):
if self.boundingbox:
return self.boundingbox
else:
return BoundingBox.WORLD
class VoronoiLayer(BaseLayer):
def __init__(self,
data,
line_color=None,
line_width=2,
f_tooltip=None,
cmap=None,
max_area=1e4,
alpha=220):
"""
Draw the voronoi tesselation of the points from data
:param data: data access object
:param line_color: line color
:param line_width: line width
:param f_tooltip: function to generate a tooltip on mouseover
:param cmap: color map
:param max_area: scaling constant to determine the color of the voronoi areas
:param alpha: color alpha
:return:
"""
self.data = data
if cmap is None and line_color is None:
raise Exception('need either cmap or line_color')
if cmap is not None:
cmap = colors.ColorMap(cmap, alpha=alpha, levels=10)
self.cmap = cmap
self.line_color = line_color
self.line_width = line_width
self.f_tooltip = f_tooltip
self.max_area = max_area
# source: https://gist.github.com/pv/8036995
@staticmethod
def __voronoi_finite_polygons_2d(vor, radius=None):
"""
Reconstruct infinite voronoi regions in a 2D diagram to finite
regions.
Parameters
----------
vor : Voronoi
Input diagram
radius : float, optional
Distance to 'points at infinity'.
Returns
-------
regions : list of tuples
Indices of vertices in each revised Voronoi regions.
vertices : list of tuples
Coordinates for revised Voronoi vertices. Same as coordinates
of input vertices, with 'points at infinity' appended to the
end.
"""
if vor.points.shape[1] != 2:
raise ValueError("Requires 2D input")
new_regions = []
new_vertices = vor.vertices.tolist()
center = vor.points.mean(axis=0)
if radius is None:
radius = vor.points.ptp().max()
# Construct a map containing all ridges for a given point
all_ridges = {}
for (p1, p2), (v1, v2) in zip(vor.ridge_points, vor.ridge_vertices):
all_ridges.setdefault(p1, []).append((p2, v1, v2))
all_ridges.setdefault(p2, []).append((p1, v1, v2))
# Reconstruct infinite regions
for p1, region in enumerate(vor.point_region):
vertices = vor.regions[region]
if all(v >= 0 for v in vertices):
# finite region
new_regions.append(vertices)
continue
# reconstruct a non-finite region
if p1 not in all_ridges:
continue
ridges = all_ridges[p1]
new_region = [v for v in vertices if v >= 0]
for p2, v1, v2 in ridges:
if v2 < 0:
v1, v2 = v2, v1
if v1 >= 0:
# finite ridge: already in the region
continue
# Compute the missing endpoint of an infinite ridge
t = vor.points[p2] - vor.points[p1] # tangent
t /= np.linalg.norm(t)
n = np.array([-t[1], t[0]]) # normal
midpoint = vor.points[[p1, p2]].mean(axis=0)
direction = np.sign(np.dot(midpoint - center, n)) * n
far_point = vor.vertices[v2] + direction * radius
new_region.append(len(new_vertices))
new_vertices.append(far_point.tolist())
# sort region counterclockwise
vs = np.asarray([new_vertices[v] for v in new_region])
c = vs.mean(axis=0)
angles = np.arctan2(vs[:, 1] - c[1], vs[:, 0] - c[0])
new_region = np.array(new_region)[np.argsort(angles)]
# finish
new_regions.append(new_region.tolist())
return new_regions, np.asarray(new_vertices)
# Area of a polygon: http://www.mathopenref.com/coordpolygonarea.html
@staticmethod
def _get_area(p):
return 0.5 * abs(
sum(x0 * y1 - x1 * y0
for ((x0, y0), (x1, y1)) in zip(p, p[1:] + [p[0]])))
def invalidate(self, proj):
try:
from scipy.spatial.qhull import Voronoi
except ImportError:
print('VoronoiLayer needs scipy >= 0.12')
raise
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
points = list(zip(x, y))
vor = Voronoi(points)
regions, vertices = VoronoiLayer.__voronoi_finite_polygons_2d(vor)
self.hotspots = HotspotManager()
self.painter = BatchPainter()
for idx, region in enumerate(regions):
polygon = vertices[region]
if self.line_color:
self.painter.set_color(self.line_color)
self.painter.linestrip(polygon[:, 0],
polygon[:, 1],
width=self.line_width,
closed=True)
if self.cmap:
area = VoronoiLayer._get_area(polygon.tolist())
area = max(area, 1)
self.painter.set_color(
self.cmap.to_color(area, self.max_area, 'log'))
self.painter.poly(polygon[:, 0], polygon[:, 1])
if self.f_tooltip:
record = {k: self.data[k][idx] for k in list(self.data.keys())}
self.hotspots.add_poly(polygon[:, 0], polygon[:, 1],
self.f_tooltip(record))
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'],
lats=self.data['lat'])
class ShapefileLayer(BaseLayer):
def __init__(self,
fname,
f_tooltip=None,
color=None,
linewidth=3,
shape_type='full'):
"""
Loads and draws shapefiles
:param fname: full path to the shapefile
:param f_tooltip: function to generate a tooltip on mouseover
:param color: color
:param linewidth: line width
:param shape_type: either full or bbox
"""
if color is None:
color = [255, 0, 0]
self.color = color
self.linewidth = linewidth
self.f_tooltip = f_tooltip
self.shape_type = shape_type
try:
import shapefile
except:
raise Exception('ShapefileLayer requires pyshp')
self.reader = shapefile.Reader(fname)
self.worker = None
self.queue = queue.Queue()
def invalidate(self, proj):
self.painter = BatchPainter()
self.hotspots = HotspotManager()
self.painter.set_color(self.color)
if self.worker:
self.worker.stop()
self.worker.join()
self.queue = queue.Queue()
self.worker = ShapeLoadingThread(self.queue, self.reader,
self.shape_type, proj)
self.worker.start()
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
while True:
try:
x, y, record = self.queue.get_nowait()
self.painter.linestrip(x, y, self.linewidth, closed=True)
if self.f_tooltip:
attr = {
t[0][0]: t[1]
for t in zip(self.reader.fields[1:], record)
}
value = self.f_tooltip(attr)
if self.shape_type == 'bbox':
self.hotspots.add_rect(x.min(), y.min(),
x.max() - x.min(),
y.max() - y.min(), value)
else:
self.hotspots.add_poly(x, y, value)
except queue.Empty:
break
class GraphLayer(BaseLayer):
def __init__(self,
data,
src_lat,
src_lon,
dest_lat,
dest_lon,
linewidth=1,
alpha=220,
color='hot'):
"""Create a graph drawing a line between each pair of (src_lat, src_lon) and (dest_lat, dest_lon)
:param data: data access object
:param src_lat: field name of source latitude
:param src_lon: field name of source longitude
:param dest_lat: field name of destination latitude
:param dest_lon: field name of destination longitude
:param linewidth: line width
:param alpha: color alpha
:param color: color or colormap
"""
self.data = data
self.src_lon = src_lon
self.src_lat = src_lat
self.dest_lon = dest_lon
self.dest_lat = dest_lat
self.linewidth = linewidth
alpha = alpha
self.color = color
if type(self.color) == str:
self.cmap = colors.ColorMap(self.color, alpha)
def invalidate(self, proj):
self.painter = BatchPainter()
x0, y0 = proj.lonlat_to_screen(self.data[self.src_lon],
self.data[self.src_lat])
x1, y1 = proj.lonlat_to_screen(self.data[self.dest_lon],
self.data[self.dest_lat])
if type(self.color) == list:
self.painter.set_color(self.color)
self.painter.lines(x0, y0, x1, y1, width=self.linewidth)
else:
manhattan = np.abs(x0 - x1) + np.abs(y0 - y1)
vmax = manhattan.max()
distances = np.logspace(0, log10(manhattan.max()), 20)
for i in range(len(distances) - 1, 1, -1):
mask = (manhattan > distances[i - 1]) & (manhattan <=
distances[i])
self.painter.set_color(
self.cmap.to_color(distances[i], vmax, 'log'))
self.painter.lines(x0[mask],
y0[mask],
x1[mask],
y1[mask],
width=self.linewidth)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
def bbox(self):
return BoundingBox.from_points(
lons=np.hstack([self.data[self.src_lon],
self.data[self.dest_lon]]),
lats=np.hstack([self.data[self.src_lat],
self.data[self.dest_lat]]))
class HistogramLayer(BaseLayer):
def __init__(self,
data,
cmap='hot',
alpha=220,
colorscale='sqrt',
binsize=16,
show_tooltip=False,
scalemin=0,
scalemax=None,
f_group=None,
show_colorbar=True):
"""Create a 2D histogram
:param data: data access object
:param cmap: colormap name
:param alpha: color alpha
:param colorscale: scaling [lin, log, sqrt]
:param binsize: size of the hist bins
:param show_tooltip: if True, will show the value of bins on mouseover
:param scalemin: min value for displaying a bin
:param scalemax: max value for a bin
:param f_group: function to apply to samples in the same bin. Default is to count
:param show_colorbar: show colorbar
:return:
"""
self.data = data
self.cmap = colors.ColorMap(cmap, alpha=alpha)
self.binsize = binsize
self.show_tooltip = show_tooltip
self.scalemin = scalemin
self.scalemax = scalemax
self.colorscale = colorscale
self.f_group = f_group
if self.f_group is None:
self.f_group = lambda grp: len(grp)
self.show_colorbar = show_colorbar
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
self.data['_xbin'] = (x / self.binsize).astype(int)
self.data['_ybin'] = (y / self.binsize).astype(int)
uniquevalues = set([
tuple(row)
for row in np.vstack([self.data['_xbin'], self.data['_ybin']]).T
])
results = {(v1,v2): self.f_group(self.data.where((self.data['_xbin'] == v1) & (self.data['_ybin'] == v2))) \
for v1, v2 in uniquevalues}
del self.data['_xbin']
del self.data['_ybin']
self.hotspot = HotspotManager()
if self.scalemax:
self.vmax = self.scalemax
else:
self.vmax = max(results.values()) if len(results) > 0 else 0
if self.vmax >= 1:
for (ix, iy), value in list(results.items()):
if value > self.scalemin:
self.painter.set_color(
self.cmap.to_color(value, self.vmax, self.colorscale))
l = self.binsize
rx = ix * self.binsize
ry = iy * self.binsize
self.painter.rect(rx, ry, rx + l, ry + l)
if self.show_tooltip:
self.hotspot.add_rect(rx, ry, l, l,
'Value: %d' % value)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspot.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
if self.show_colorbar:
ui_manager.add_colorbar(self.cmap, self.vmax, self.colorscale)
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'],
lats=self.data['lat'])
class GeoJSONLayer(BaseLayer):
def __init__(self, geojson_or_fname, color='b', linewidth=1, fill=False, f_tooltip=None):
self.color = color
self.linewidth = linewidth
self.fill = fill
self.f_tooltip = f_tooltip
if type(geojson_or_fname) == str:
with open(geojson_or_fname) as fin:
self.data = json.load(fin)
elif type(geojson_or_fname) == dict:
self.data = geojson_or_fname
else:
raise Exception('must provide either dict or filename')
self.boundingbox = None
for feature in self.data['features']:
if feature['geometry']['type'] == 'Polygon':
for poly in feature['geometry']['coordinates']:
poly = np.array(poly)
self.__update_bbox(poly[:,0], poly[:,1])
elif feature['geometry']['type'] == 'MultiPolygon':
for multipoly in feature['geometry']['coordinates']:
for poly in multipoly:
poly = np.array(poly)
self.__update_bbox(poly[:,0], poly[:,1])
elif feature['geometry']['type'] == 'Point':
lon,lat = feature['geometry']['coordinates']
self.__update_bbox(np.array([lon]), np.array([lat]))
elif feature['geometry']['type'] == 'LineString':
line = np.array(feature['geometry']['coordinates'])
self.__update_bbox(line[:,0], line[:,1])
def __update_bbox(self, lon, lat):
if self.boundingbox is None:
self.boundingbox = BoundingBox(north=lat.max(), south=lat.min(), west=lon.min(), east=lon.max())
else:
self.boundingbox = BoundingBox(
north=max(self.boundingbox.north, lat.max()),
south=min(self.boundingbox.south, lat.min()),
west=min(self.boundingbox.west, lon.min()),
east=max(self.boundingbox.east, lon.max()))
def invalidate(self, proj):
self.painter = BatchPainter()
self.hotspots = HotspotManager()
for feature in self.data['features']:
if isfunction(self.color):
self.painter.set_color(self.color(feature['properties']))
else:
self.painter.set_color(self.color)
if feature['geometry']['type'] == 'Polygon':
for poly in feature['geometry']['coordinates']:
poly = np.array(poly)
x, y = proj.lonlat_to_screen(poly[:,0], poly[:,1])
if self.fill:
self.painter.poly(x, y)
else:
self.painter.linestrip(x, y, self.linewidth, closed=True)
if self.f_tooltip:
self.hotspots.add_poly(x, y, self.f_tooltip(feature['properties']))
elif feature['geometry']['type'] == 'MultiPolygon':
for multipoly in feature['geometry']['coordinates']:
for poly in multipoly:
poly = np.array(poly)
x, y = proj.lonlat_to_screen(poly[:,0], poly[:,1])
if self.fill:
self.painter.poly(x, y)
else:
self.painter.linestrip(x, y, self.linewidth, closed=True)
if self.f_tooltip:
self.hotspots.add_poly(x, y, self.f_tooltip(feature['properties']))
elif feature['geometry']['type'] == 'Point':
lon,lat = feature['geometry']['coordinates']
x, y = proj.lonlat_to_screen(np.array([lon]), np.array([lat]))
self.painter.points(x, y)
elif feature['geometry']['type'] == 'LineString':
line = np.array(feature['geometry']['coordinates'])
x, y = proj.lonlat_to_screen(line[:,0], line[:,1])
self.painter.linestrip(x, y, self.linewidth, closed=False)
else:
print('unknow geometry %s' % feature['geometry']['type'])
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
def bbox(self):
if self.boundingbox:
return self.boundingbox
else:
return BoundingBox.WORLD
class LineLayer(layers.BaseLayer):
"""
Draws line connecting points in hurricane path
"""
def __init__(self, data, num, color=None, point_size=2, linewidth=1, f_tooltip=None):
"""
Creates a LineLayer for the python geoplotlib library
:param data: DataAccessObject of latitudes and longitudes
:param num: number of data points in dat
:param color: color of lines, just to red if none
:param point_size: size of points
:param linewidth: width of lines
:param f_tooltip: an attribute of geoplotlib's BaseLayer that is not used
"""
self.data = data
self.indexlst = num
self.color = color
if self.color is None:
self.color = [255, 0, 0]
self.point_size = point_size
self.f_tooltip = f_tooltip
self.linewidth = linewidth
self.hotspots = HotspotManager()
def invalidate(self, proj):
"""
This method is called each time layers need to be redrawn, i.e. on zoom.
Typically in this method a BatchPainter is instantiated and all the rendering is performed
:param proj: the current Projector object
"""
self.painter = BatchPainter()
self.painter.set_color(self.color)
x1, y1 = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
self.painter.points(x1, y1, 2 * self.point_size, False)
for i in self.indexlst:
if i < len(self.data['lon']) - 1:
x1 = self.data['lon'][i]
y1 = self.data['lat'][i]
x2 = self.data['lon'][i+1]
y2 = self.data['lat'][i+1]
x1, y1 = proj.lonlat_to_screen(x1, y1)
x2, y2 = proj.lonlat_to_screen(x2, y2)
self.painter.lines(x1, y1, x2, y2, width=self.linewidth)
if self.f_tooltip:
for i in range(0, len(x1)):
record = {k: self.data[k][i] for k in self.data.keys()}
self.hotspots.add_rect(x1[i] - self.point_size, y1[i] - self.point_size,
2 * self.point_size, 2 * self.point_size,
self.f_tooltip(record))
def draw(self, proj, mouse_x, mouse_y, ui_manager):
"""
This method is called at every frame, and typically executes BatchPainter.batch_draw()
:param proj: the current Projector object
:param mouse_x: mouse x
:param mouse_y: mouse y
:param ui_manager: the current UiManager
"""
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
def bbox(self):
"""
Return the bounding box for this layer
"""
return BoundingBox.from_points(lons=self.data['lon'], lats=self.data['lat'])
def on_key_release(self, key, modifiers):
"""
Override this method for custom handling of keystrokes
:param key: the key that has been released
:param modifiers: the key modifiers
:return: True if the layer needs to call invalidate
"""
return False
class HistogramLayer(BaseLayer):
def __init__(self, data, cmap='hot', alpha=220, colorscale='sqrt',
binsize=16, show_tooltip=False, scalemin=0, scalemax=None, f_group=None):
"""Create a 2D histogram
:param data: data access object
:param cmap: colormap name
:param alpha: color alpha
:param colorscale: scaling [lin, log, sqrt]
:param binsize: size of the hist bins
:param show_tooltip: if True, will show the value of bins on mouseover
:param scalemin: min value for displaying a bin
:param scalemax: max value for a bin
:param f_group: function to apply to samples in the same bin. Default is to count
:return:
"""
self.data = data
self.cmap = colors.ColorMap(cmap, alpha=alpha)
self.binsize = binsize
self.show_tooltip = show_tooltip
self.scalemin = scalemin
self.scalemax = scalemax
self.colorscale = colorscale
self.f_group = f_group
if self.f_group is None:
self.f_group = lambda grp: len(grp)
def invalidate(self, proj):
self.painter = BatchPainter()
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
self.data['_xbin'] = (x / self.binsize).astype(int)
self.data['_ybin'] = (y / self.binsize).astype(int)
uniquevalues = set([tuple(row) for row in np.vstack([self.data['_xbin'],self.data['_ybin']]).T])
results = {(v1,v2): self.f_group(self.data.where((self.data['_xbin'] == v1) & (self.data['_ybin'] == v2))) \
for v1, v2 in uniquevalues}
del self.data['_xbin']
del self.data['_ybin']
self.hotspot = HotspotManager()
if self.scalemax:
vmax = self.scalemax
else:
vmax = max(results.values()) if len(results) > 0 else 0
if vmax >= 1:
for (ix, iy), value in results.items():
if value > self.scalemin:
self.painter.set_color(self.cmap.to_color(value, vmax, self.colorscale))
l = self.binsize
rx = ix * self.binsize
ry = iy * self.binsize
self.painter.rect(rx, ry, rx+l, ry+l)
if self.show_tooltip:
self.hotspot.add_rect(rx, ry, l, l, 'Value: %d' % value)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspot.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'], lats=self.data['lat'])
class GraphLayer(BaseLayer):
def __init__(self,
data,
src_lat,
src_lon,
dest_lat,
dest_lon,
linewidth=1,
alpha=220,
color='hot',
levels=10,
color_by=None,
seg_scale='log'):
"""Create a graph drawing a line between each pair of (src_lat, src_lon) and (dest_lat, dest_lon)
:param data: data access object
:param src_lat: field name of source latitude
:param src_lon: field name of source longitude
:param dest_lat: field name of destination latitude
:param dest_lon: field name of destination longitude
:param linewidth: line width
:param alpha: color alpha
:param color: color or colormap
:param levels: coloring levels
:param color_by: attribute name for color, default using node distance
:param seg_scale: coloring data segamentation sacle, 'log' or 'lin',
'lin' only used if not by distance
"""
self.data = data
self.src_lon = src_lon
self.src_lat = src_lat
self.dest_lon = dest_lon
self.dest_lat = dest_lat
self.linewidth = linewidth
alpha = alpha
self.color = color
if type(self.color) == str:
self.cmap = colors.ColorMap(self.color, alpha, levels=levels)
if color_by is None:
self.color_by = 'distance'
self.seg_scale = seg_scale
def invalidate(self, proj):
self.painter = BatchPainter()
x0, y0 = proj.lonlat_to_screen(self.data[self.src_lon],
self.data[self.src_lat])
x1, y1 = proj.lonlat_to_screen(self.data[self.dest_lon],
self.data[self.dest_lat])
if type(self.color) == list:
self.painter.set_color(self.color)
self.painter.lines(x0, y0, x1, y1, width=self.linewidth)
else:
if self.color_by == 'distance':
manhattan = np.abs(x0 - x1) + np.abs(y0 - y1)
vmax = manhattan.max()
segmentations = np.logspace(0, log10(vmax), 20)
self.seg_scale = 'log'
else:
manhattan = self.data[self.color_by]
vmax = manhattan.max()
if self.seg_scale == 'log':
# value 20 maybe should be optional
segmentations = np.logspace(0, log10(vmax), 20)
else:
# linear
segmentations = np.linspace(0, vmax, 20)
for i in range(len(segmentations) - 1, 1, -1):
mask = (manhattan > segmentations[i - 1]) & (manhattan <=
segmentations[i])
self.painter.set_color(
self.cmap.to_color(segmentations[i], vmax, self.seg_scale))
self.painter.lines(x0[mask],
y0[mask],
x1[mask],
y1[mask],
width=self.linewidth)
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
def bbox(self):
return BoundingBox.from_points(
lons=np.hstack([self.data[self.src_lon],
self.data[self.dest_lon]]),
lats=np.hstack([self.data[self.src_lat],
self.data[self.dest_lat]]))
class ShapefileLayer(BaseLayer):
def __init__(self, fname, f_tooltip=None, color=None, linewidth=3, shape_type='full'):
"""
Loads and draws shapefiles
:param fname: full path to the shapefile
:param f_tooltip: function to generate a tooltip on mouseover
:param color: color
:param linewidth: line width
:param shape_type: either full or bbox
"""
if color is None:
color = [255, 0, 0]
self.color = color
self.linewidth = linewidth
self.f_tooltip = f_tooltip
self.shape_type = shape_type
try:
import shapefile
except:
raise Exception('ShapefileLayer requires pyshp')
self.reader = shapefile.Reader(fname)
self.worker = None
self.queue = Queue.Queue()
def invalidate(self, proj):
self.painter = BatchPainter()
self.hotspots = HotspotManager()
self.painter.set_color(self.color)
if self.worker:
self.worker.stop()
self.worker.join()
self.queue = Queue.Queue()
self.worker = ShapeLoadingThread(self.queue, self.reader, self.shape_type, proj)
self.worker.start()
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
while True:
try:
x, y, record = self.queue.get_nowait()
self.painter.linestrip(x, y, self.linewidth, closed=True)
if self.f_tooltip:
attr = {t[0][0]: t[1] for t in zip(self.reader.fields[1:], record)}
value = self.f_tooltip(attr)
if self.shape_type == 'bbox':
self.hotspots.add_rect(x.min(), y.min(), x.max()-x.min(), y.max()-y.min(), value)
else:
self.hotspots.add_poly(x, y, value)
except Queue.Empty:
break
class VoronoiLayer(BaseLayer):
def __init__(self, data, line_color=None, line_width=2, f_tooltip=None, cmap=None, max_area=1e4, alpha=220):
"""
Draw the voronoi tesselation of the points from data
:param data: data access object
:param line_color: line color
:param line_width: line width
:param f_tooltip: function to generate a tooltip on mouseover
:param cmap: color map
:param max_area: scaling constant to determine the color of the voronoi areas
:param alpha: color alpha
:return:
"""
self.data = data
if cmap is None and line_color is None:
raise Exception('need either cmap or line_color')
if cmap is not None:
cmap = colors.ColorMap(cmap, alpha=alpha, levels=10)
self.cmap = cmap
self.line_color = line_color
self.line_width = line_width
self.f_tooltip = f_tooltip
self.max_area = max_area
# source: https://gist.github.com/pv/8036995
@staticmethod
def __voronoi_finite_polygons_2d(vor, radius=None):
"""
Reconstruct infinite voronoi regions in a 2D diagram to finite
regions.
Parameters
----------
vor : Voronoi
Input diagram
radius : float, optional
Distance to 'points at infinity'.
Returns
-------
regions : list of tuples
Indices of vertices in each revised Voronoi regions.
vertices : list of tuples
Coordinates for revised Voronoi vertices. Same as coordinates
of input vertices, with 'points at infinity' appended to the
end.
"""
if vor.points.shape[1] != 2:
raise ValueError("Requires 2D input")
new_regions = []
new_vertices = vor.vertices.tolist()
center = vor.points.mean(axis=0)
if radius is None:
radius = vor.points.ptp().max()
# Construct a map containing all ridges for a given point
all_ridges = {}
for (p1, p2), (v1, v2) in zip(vor.ridge_points, vor.ridge_vertices):
all_ridges.setdefault(p1, []).append((p2, v1, v2))
all_ridges.setdefault(p2, []).append((p1, v1, v2))
# Reconstruct infinite regions
for p1, region in enumerate(vor.point_region):
vertices = vor.regions[region]
if all(v >= 0 for v in vertices):
# finite region
new_regions.append(vertices)
continue
# reconstruct a non-finite region
if p1 not in all_ridges:
continue
ridges = all_ridges[p1]
new_region = [v for v in vertices if v >= 0]
for p2, v1, v2 in ridges:
if v2 < 0:
v1, v2 = v2, v1
if v1 >= 0:
# finite ridge: already in the region
continue
# Compute the missing endpoint of an infinite ridge
t = vor.points[p2] - vor.points[p1] # tangent
t /= np.linalg.norm(t)
n = np.array([-t[1], t[0]]) # normal
midpoint = vor.points[[p1, p2]].mean(axis=0)
direction = np.sign(np.dot(midpoint - center, n)) * n
far_point = vor.vertices[v2] + direction * radius
new_region.append(len(new_vertices))
new_vertices.append(far_point.tolist())
# sort region counterclockwise
vs = np.asarray([new_vertices[v] for v in new_region])
c = vs.mean(axis=0)
angles = np.arctan2(vs[:,1] - c[1], vs[:,0] - c[0])
new_region = np.array(new_region)[np.argsort(angles)]
# finish
new_regions.append(new_region.tolist())
return new_regions, np.asarray(new_vertices)
# Area of a polygon: http://www.mathopenref.com/coordpolygonarea.html
@staticmethod
def _get_area(p):
return 0.5 * abs(sum(x0*y1 - x1*y0
for ((x0, y0), (x1, y1)) in zip(p, p[1:] + [p[0]])))
def invalidate(self, proj):
try:
from scipy.spatial.qhull import Voronoi
except ImportError:
print('VoronoiLayer needs scipy >= 0.12')
raise
x, y = proj.lonlat_to_screen(self.data['lon'], self.data['lat'])
points = list(set(zip(x,y)))
vor = Voronoi(points)
regions, vertices = VoronoiLayer.__voronoi_finite_polygons_2d(vor)
self.hotspots = HotspotManager()
self.painter = BatchPainter()
for idx, region in enumerate(regions):
polygon = vertices[region]
if self.line_color:
self.painter.set_color(self.line_color)
self.painter.linestrip(polygon[:,0], polygon[:,1], width=self.line_width, closed=True)
if self.cmap:
area = VoronoiLayer._get_area(polygon.tolist())
area = max(area, 1)
self.painter.set_color(self.cmap.to_color(area, self.max_area, 'log'))
self.painter.poly(polygon[:,0], polygon[:,1])
if self.f_tooltip:
record = {k: self.data[k][idx] for k in self.data.keys()}
self.hotspots.add_poly(polygon[:,0], polygon[:,1], self.f_tooltip(record))
def draw(self, proj, mouse_x, mouse_y, ui_manager):
self.painter.batch_draw()
picked = self.hotspots.pick(mouse_x, mouse_y)
if picked:
ui_manager.tooltip(picked)
def bbox(self):
return BoundingBox.from_points(lons=self.data['lon'], lats=self.data['lat'])
