def get_nearest_port(nodes, lat, lon):
min_dist = sys.maxint
port = None
for node in nodes:
dist = geo.latlon_distance(node['lat'], node['lon'], lat, lon)
if dist < min_dist:
min_dist = dist
port = node
return port
def get_nearest_port(nodes, lat, lon):
min_dist = sys.maxint
port = None
for node in nodes:
dist = geo.latlon_distance(node['lat'], node['lon'], lat, lon)
if dist < min_dist:
min_dist = dist
port = node
return port
def merge_nodes(nodes):
# FIXME: This is wrong. The remove needs to redirect parents to the new node, but not children
node_lookup = {}
for node in nodes:
node_lookup[node['node']] = node
while(True):
to_del = []
for nodeA_id in node_lookup:
nodeA = node_lookup[nodeA_id]
for nodeB_id in node_lookup:
if nodeA_id == nodeB_id:
continue
nodeB = node_lookup[nodeB_id]
if geo.latlon_distance(nodeA['lat'], nodeA['lon'], nodeB['lat'], nodeB['lon']) < 100:
# Remove from node a
if nodeB_id in nodeA['edges']:
nodeA['edges'].remove(nodeB_id)
# Copy node b's edges from node a
for edge in nodeB['edges']:
if edge not in nodeA['edges']:
nodeA['edges'].append(edge)
# Find all nodes that have edge to node b
for node_id in node_lookup:
if node_id == nodeA_id or node_id == nodeB_id:
continue
node = node_lookup[node_id]
# check if the node has edge to node b
if nodeB_id in node['edges']:
# Remove the edge to node b and replace with node a
node['edges'].remove(nodeB_id)
if nodeA_id not in node['edges']:
node['edges'].append(nodeA_id)
to_del.append(nodeB_id)
if len(to_del) > 0:
break
if len(to_del) == 0:
break
for node_id in to_del:
if node_id in node_lookup:
print('removing node %s' % node_id)
del node_lookup[node_id]
result = []
for node_id in node_lookup:
result.append(node_lookup[node_id])
return result
def _get_distance(nodes, from_n, to_n):
from_node = nodes[from_n]
to_node = nodes[to_n]
return geo.latlon_distance(from_node['lat'], from_node['lon'], to_node['lat'], to_node['lon'])
def _get_distance(nodes, from_n, to_n):
from_node = nodes[from_n]
to_node = nodes[to_n]
return geo.latlon_distance(from_node['lat'], from_node['lon'], to_node['lat'], to_node['lon'])
