def get_type(coordinates_conv_dict, start_end_ids_dict, other, base, link_id):
_a_ = start_end_ids_dict[link_id][0]
_b_ = start_end_ids_dict[link_id][1]
_len_ = start_end_ids_dict[link_id][2]
print "{0}:{1}->{2}".format(link_id, _a_, _b_)
# if any of these nodes are not in the list, just ouput
if _a_ not in coordinates_conv_dict or _b_ not in coordinates_conv_dict:
#route_not_found_or_not_identified_dict[link_id] = _len_
return _len_, np.nan, 1 # one or more of the nodes not in base network
if _len_ < 2 * buffer_dist / 5280: # if the links are comparable in size to the buffer distance
#miniature_links_dict[link_id] = _len_
return _len_, np.nan, 4 # length of the link is too small compared to buffer
# prepare ND
# use the key to buffer/clip/create ND
#network_dataset_ND = "in_memory/ND1"
other_f = "other_f"
arcpy.MakeFeatureLayer_management(other, other_f)
no_tolerance_buffer_dist = "1000 feet"
where_clause = """ "_ID_" = %d""" % link_id
arcpy.SelectLayerByAttribute_management(other_f, "NEW_SELECTION", where_clause)
arcpy.Buffer_analysis(other_f, buffer_shp, no_tolerance_buffer_dist)
arcpy.Clip_analysis(base, buffer_shp, network_dataset)
#arcpy.na.CreateNetworkDataset("in_memory_n1", network_dataset_ND, "", "NO_ELEVATION" )
arcpy.BuildNetwork_na(network_dataset_ND)
(a_list, b_list) = (coordinates_conv_dict[_a_], coordinates_conv_dict[_b_])
minimum_distance = get_route_distance(a_list, b_list, network_dataset_ND)
if minimum_distance == 99999: # any route not found in the buffer layer
minimum_distance = get_route_distance(a_list, b_list, all_dataset_ND)
if minimum_distance == 99999:
#route_not_found_or_not_identified_dict[link_id] = _len_
return _len_, np.nan, 1 # nodes mapped but route not found in base network
else:
#route_found_within_network_dict[link_id] = [minimum_distance, _len_]
return _len_, minimum_distance, 2 # route not found within buffer
else:
#route_found_within_buffer_dict[link_id] = [minimum_distance, _len_]
return _len_, minimum_distance, 3 # routes found within buffer
SnappedNodes = 'M:/RAIL/OngoingWork/newconnections/railway_ln/allnodes_Snapped_rail2'
newoldnodesconversion = 'M:/RAIL/OngoingWork/new_old_node_conversion.csv'
o = "C:\\GIS\\o.shp" #temporary files
d = "C:\\GIS\\d.shp"
m = "C:\\GIS\\m.shp"
temp = "C:\\GIS\\teemp.shp"
temp1 = "C:\\GIS\\teemp1.shp"
temp2 = "C:\\GIS\\teemp2.shp"
B1_ND = "M:/RAIL/OngoingWork/newconnections/railway_ln/Rail2_ND.nd"
feature = "M:/RAIL/OngoingWork/newconnections/intermediate/feature_unlocked.shp" #i guess this is just a temporary layer/ no worries
arcpy.CheckOutExtension("Network")
arcpy.BuildNetwork_na(B1_ND) #because the Rail2_ND file may have been changed
print("Network Rebuilt")
arcpy.MakeRouteLayer_na(B1_ND, "Route", "Length")
allnodes = Dbf5(all_nodes + '.dbf').to_dataframe()
Links_Final2 = Dbf5(linksfinal + '.dbf').to_dataframe()
#creates a dictionary of two columns
def get_dictionary(columnA, columnB, dataframe_name):
dict = {}
for i in range(len(Links_Final2)):
dict[dataframe_name[columnA][i]] = []
dict[dataframe_name[columnB][i]] = []
for i in range(len(dataframe_name)):
dict[dataframe_name[columnA][i]].append(dataframe_name[columnB][i])
(currentSpeed))
# Change Expo speed, recalculate fields
arcpy.CalculateField_management("ExpoLine_split", "avgspd",
"%d" % (currentSpeed), "PYTHON", "#")
arcpy.CalculateField_management("ExpoLine_split", "Cost",
"[TotalLengt]*21.46/ [avgspd]", "VB",
"#")
arcpy.CalculateField_management("ExpoLine_split", "DPS",
"[TotalLengt]/ [avgspd]", "VB", "#")
arcpy.AddMessage(
"Expo speed changed to %d, cost and DPS recalculated. Rebuilding ND."
% (currentSpeed))
# Rebuild Network
arcpy.BuildNetwork_na(inND)
arcpy.AddMessage("ND Rebuild completed")
time.sleep(loopTime)
# Add lcoations
inOrigins = fcTAZ
inDestinations = fcTAZ
## arcpy.AddLocations_na(inOD, "Origins", inOrigins,
## "Name ID_TAZ12A #;SourceID SourceID #;SourceOID SourceOID #;PosAlong PosAlong #;SideOfEdge SideOfEdge #", append = "CLEAR")
## arcpy.AddLocations_na(inOD, "Destinations", inDestinations,
## "Name ID_TAZ12A #;SourceID SourceID #;SourceOID SourceOID #;PosAlong PosAlong #;SideOfEdge SideOfEdge #", append = "CLEAR")
#Add using geometries instead. Should only add 2 min per iteration or 40 min overall
arcpy.AddLocations_na(inOD,
"Origins",
inOrigins,
"Name ID_TAZ12A #",
old_n = old_nodes_shp
new_n = new_nodes_shp
old_l = old_links_shp
new_l = new_links_clipped
old_ns = snapped_old_nodes
new_ngt = "../../RAIL11/RAIL/gis/allnodes.shp"
empty = "C:/gis/empty.shp"
empty_memory = "in_memory/e1"
memory_1 = "in_memory/m1"
memory_2 = "in_memory/m2"
arcpy.CopyFeatures_management(empty, empty_memory)
arcpy.env.overwriteOutput = True # overwrite files if its already present
arcpy.CheckOutExtension("Network")
arcpy.BuildNetwork_na(B1_ND)
arcpy.MakeRouteLayer_na(B1_ND, B1_route, "Length")
arcpy.MakeFeatureLayer_management(new_l, "newlf")
# how far is the nearest node (old network)
def get_near_node_dict(nodelayer):
arcpy.Project_management(nodelayer, temp1, arcpy.SpatialReference(102039))
fid_id_dict = {
row.getValue("FID"): row.getValue("_ID_")
for row in arcpy.SearchCursor(temp1)
}
arcpy.Near_analysis(temp1, temp1)
near_node_dict = {
row.getValue("_ID_"):
[row.getValue("NEAR_Fid"),
# Input: Specify a value for Impedance Cutoff (maximum distance from a facility for which a voter will be assigned)
cutoff = str(arcpy.GetParameterAsText(3))
# Input: Facilities point FC to be added as Facilities (potential polling places)
polling_facilities = str(arcpy.GetParameterAsText(4))
# Input: Voters point FC to be added as Demand Points (subset of given percentage of voter points)
Voters = arcpy.GetParameterAsText(5)
Solve_Succeeded = "true"
# Run Processes...
# Process: Build Network
arcpy.BuildNetwork_na(Network)
# Process: Make Location-Allocation Layer
LAlayer = arcpy.MakeLocationAllocationLayer_na(Network, str(AnalysisLayer), "Length", "DEMAND_TO_FACILITY",
"MINIMIZE_FACILITIES", "1", cutoff, "LINEAR", "1", "10", "", "ALLOW_UTURNS", "", "NO_HIERARCHY",
"STRAIGHT_LINES", "1", "")
# Process: Add Locations: Facilities (Potential Polling Places)
arcpy.AddLocations_na(LAlayer, "Facilities", polling_facilities,
"Name Name #;Capacity Capacity #", "1000 Feet", "NAME",
"street_network SHAPE", "MATCH_TO_CLOSEST", "APPEND", "SNAP", "", "INCLUDE", "#")
# Process: Add Locations: Demand Points (Voters)
arcpy.AddLocations_na(LAlayer, "Demand Points", Voters, "", "1000 Feet", "",
"street_network SHAPE", "MATCH_TO_CLOSEST", "APPEND", "SNAP", "", "INCLUDE", "#")
def solve_network(config_json):
# This function creates a network dataset from a template,
# builds the network, adds the nearest station points as stops,
# and solves for the least-cost route
# check network analyst license
arcpy.CheckOutExtension("network")
print('Network Analyst License Confirmed!')
# set directory and path for network geodatabase
config_data = read_config_json(config_json)
project_dir = config_data['directories']['project_dir']
save_dir = config_data['directories']['save_dir']
direction_save_name = config_data['filenames']['direction_save_name']
gdb_dir = project_dir + r'/Data'
gdb_name = r'Bikeshare_GDB'
gdb_path = gdb_dir + r'/' + gdb_name + r'.gdb'
feature_dataset_name = 'Bikeshare'
gdb_feature_path = gdb_path + r'/' + feature_dataset_name
# set arcpy workspace
arcpy.env.workspace = gdb_path
# create network dataset from template
arcpy.CreateNetworkDatasetFromTemplate_na(
(project_dir + r'/Bikeshare_ND_template.xml'), # network dataset template location
gdb_feature_path # feature dataset for network
)
# build network dataset
arcpy.BuildNetwork_na(gdb_feature_path + r'/Bikeshare_ND')
# create layer for least-cost route analysis
arcpy.MakeRouteLayer_na(
"Bikeshare_ND", # input network dataset
"Route", # output route analysis layer
"Time", # impedance attribute
)
# add nearest station routing points
arcpy.AddLocations_na(
"Route", # input route analysis layer
"Stops", # "Stops" analysis sub-layer
"Bike_Stations_Intersect", # input features table
"Name Name #", # field mapping
"5000 Meters", # search tolerance
"ORIG_FID", # sort field
)
# solve the routing problem
arcpy.Solve_na(
"Route", # input route analysis layer
)
# export bike route as feature
arcpy.FeatureClassToGeodatabase_conversion(
r"Route\Routes",
gdb_feature_path
)
print('Network Route Complete!')
# export route directions
arcpy.Directions_na(
"Route", # input route analysis layer
"TEXT", # export format
(save_dir + r'/' + direction_save_name + r'.txt'), # export path
"Meters", # distance units
"REPORT_TIME", # write travel time
"Minutes" # travel time units
)
print('Route Directions Exported!')
def test_network_routing(the_scenario, logger):
# already called aftot_setup.setup() to initialize and clean up :
# - starting with populate network template with modes and intermodal.
# no other facilities yet (e.g. raw material producers or destinations).
# Setup Facilities for the Test
# i. - append facilities to the network dataset template
# ii. - hook the facilities with artificial links
# --------------------------------------------------------
ftot_facilities.raw_material_producers_setup(the_scenario, logger)
ftot_facilities.ultimate_destinations_setup(the_scenario, logger)
ftot_facilities.hook_facilities_into_network(
the_scenario, logger, False) # false means pipeline doesn't get used
# assign baseline costs to the network
ftot_supporting_gis.assign_network_costs(
the_scenario, logger, False,
None) # false means pipeline doesn't get used
# delete the route cache from the previous test
delete_routes_cache_db(logger, the_scenario)
# test 0 : baseline as is.
# ---------------------------
logger.info("START TEST 0: baseline as is")
temp_start_time = datetime.datetime.now()
# reset artificial link costs to what they should be
logger.info("reset_flow_restrictions to what they should be")
reset_artificial_link_flow_restrictions(logger, the_scenario)
# - build the network template
ftot_supporting_gis.build_the_network(the_scenario, logger)
# - route as is
ftot_routing.initial_routing(the_scenario, logger)
# output route information and maps
# -----------------------------------
# some sort of test or diagnostics. what is the baseline?
# report out the following from the main.db:
# GENERAL - number of routes, avg. cost, total cost,
get_main_db_route_info(the_scenario, logger)
# report out from the routes_cahce.db
get_route_cache_db_route_info(the_scenario, logger)
logger.info("TODO: output route information and maps")
temp_end_time = datetime.datetime.now()
temp_total_time = temp_end_time - temp_start_time
logger.result("END TEST 0: baseline as is. Total time: {:.10}".format(
temp_total_time))
# todo - mnp - 06152015 -- test 1 runs fine, but test 2 fails at "start: delete_temp_gdbs".
# this test has 4 messages: No routing solution found -- the other methods have 2. ???
# WindowsError: [Error 32] The process cannot access the file because it is being used by another process: 'C:\\FTOT\\branches\\2017_06_15_V3_SP1\\Scenarios\\prototype_testing\\proto1\\test5_ASCENT_a2j\\temp_route_gdbs\\tmp_route_solve_batch_0.gdb\\a00000009.gdbtable'
# # test 1 : no available modes - all artificial links cost -1
# # ----------------------------------------------------------
# logger.info("START TEST 1: no available modes - all artificial links cost -1")
# temp_start_time = datetime.datetime.now()
#
# # delete the route cache from the previous test
# delete_routes_cache_db(logger, the_scenario)
#
# # set artificial link costs to -1
# logger.info("set_flow_restrictions for all aritificial links to -1")
# ftot_supporting_gis.set_flow_restrictions(logger, the_scenario, "no_modes")
#
# # build the network inline since the only thing that changed is network artificial link costs
# logger.info("Building the network again with new impedences")
# arcpy.BuildNetwork_na(os.path.join(the_scenario.main_gdb, "Network/Network_ND"))
#
# # do the routing
# logger.info("Do the routing again.")
# try:
# ftot_routing.initial_routing(the_scenario, logger)
# logger.error("FAIL: the routing should have failed, but didn't. check your artificial links.")
# except:
# logger.result("PASS: the routing failed as expected because there are no valid routes.")
#
# #TODO - need to deeper check to make sure that if the scenario solves a valid route
# get_main_db_route_info(the_scenario, logger)
# temp_end_time = datetime.datetime.now()
# temp_total_time = temp_end_time - temp_start_time
# logger.result("END TEST 1: no modes. Total time: {:.10}".format(temp_total_time))
#
# test 2 : only available mode: road - all other artificial links cost -1
# ----------------------------------------------------------
logger.info(
"START TEST 2 : only available mode: road - all other artificial links cost -1"
)
temp_start_time = datetime.datetime.now()
# delete the route cache from the previous test
delete_routes_cache_db(logger, the_scenario)
# reset artificial link costs to what they should be
logger.info("reset_flow_restrictions to what they should be")
reset_artificial_link_flow_restrictions(logger, the_scenario)
# set artificial link costs to -1 for everything but road
logger.info("set flow restrictions on rail, water, pipeline")
for mode in ['rail', 'water', 'pipeline']:
ftot_supporting_gis.set_flow_restrictions(logger, the_scenario,
"no_modes", mode)
# build the network inline since the only thing that changed is network artificial link costs
logger.info("Building the network again with new impedences")
arcpy.BuildNetwork_na(
os.path.join(the_scenario.main_gdb, "Network/Network_ND"))
# do the routing
logger.info("Do the routing again.")
ftot_routing.initial_routing(the_scenario, logger)
get_main_db_route_info(the_scenario, logger)
get_route_cache_db_route_info(the_scenario, logger)
temp_end_time = datetime.datetime.now()
temp_total_time = temp_end_time - temp_start_time
logger.result(
"END TEST 2: road only. Total time: {:.10}".format(temp_total_time))
# test 3: only available mode: rail - all other artificial links cost -1
# ----------------------------------------------------------
logger.info(
"START TEST 3 : only available mode: rail - all other artificial links cost -1"
)
temp_start_time = datetime.datetime.now()
# delete the route cache from the previous test
delete_routes_cache_db(logger, the_scenario)
# reset artificial link costs to what they should be
logger.info("reset_flow_restrictions to what they should be")
reset_artificial_link_flow_restrictions(logger, the_scenario)
# set artificial link costs to -1 for everything but road
logger.info("set flow restrictions on road, water, pipeline")
for mode in ['road', 'water', 'pipeline']:
ftot_supporting_gis.set_flow_restrictions(logger, the_scenario,
"no_modes", mode)
# build the network inline since the only thing that changed is network artificial link costs
logger.info("Building the network again with new impedences")
arcpy.BuildNetwork_na(
os.path.join(the_scenario.main_gdb, "Network/Network_ND"))
# do the routing
logger.info("Do the routing again.")
ftot_routing.initial_routing(the_scenario, logger)
get_main_db_route_info(the_scenario, logger)
get_route_cache_db_route_info(the_scenario, logger)
temp_end_time = datetime.datetime.now()
temp_total_time = temp_end_time - temp_start_time
logger.result(
"END TEST 3: rail only. Total time: {:.10}".format(temp_total_time))
# test 4: only available mode: water - all other artificial links cost -1
# ----------------------------------------------------------
logger.info(
"START TEST 4 : only available mode: water- all other artificial links cost -1"
)
temp_start_time = datetime.datetime.now()
# delete the route cache from the previous test
delete_routes_cache_db(logger, the_scenario)
# reset artificial link costs to what they should be
logger.info("reset_flow_restrictions to what they should be")
reset_artificial_link_flow_restrictions(logger, the_scenario)
# set artificial link costs to -1 for everything but road
logger.info("set flow restrictions on road, water, pipeline")
for mode in ['road', 'rail', 'pipeline']:
ftot_supporting_gis.set_flow_restrictions(logger, the_scenario,
"no_modes", mode)
# build the network inline since the only thing that changed is network artificial link costs
logger.info("Building the network again with new impedences")
arcpy.BuildNetwork_na(
os.path.join(the_scenario.main_gdb, "Network/Network_ND"))
# do the routing
logger.info("Do the routing again.")
try:
ftot_routing.initial_routing(the_scenario, logger)
except:
logger.warning(
"WARNING: the routing has no valid routes on the water mode.")
logger.result(
"WARNING: the routing has no valid routes on the water mode.")
#TODO - need to deeper check to make sure that if the scenario solves a valid route
get_main_db_route_info(the_scenario, logger)
get_route_cache_db_route_info(the_scenario, logger)
temp_end_time = datetime.datetime.now()
temp_total_time = temp_end_time - temp_start_time
logger.result(
"END TEST 4: water only. Total time: {:.10}".format(temp_total_time))
# test 5: only available mode: pipeline - all other artificial links cost -1
# --------------------------------------------------------------------------
# todo - mnp - 06152017 - this will fail if pipeline is not connected in the setup phase.
logger.info(
"START TEST 5 : only available mode: pipeline - all other artificial links cost -1"
)
temp_start_time = datetime.datetime.now()
# delete the route cache from the previous test
delete_routes_cache_db(logger, the_scenario)
# reset artificial link costs to what they should be
logger.info("reset_flow_restrictions to what they should be")
reset_artificial_link_flow_restrictions(logger, the_scenario)
# set artificial link costs to -1 for everything but road
logger.info("set flow restrictions on road, water, pipeline")
for mode in ['road', 'rail', 'water']:
ftot_supporting_gis.set_flow_restrictions(logger, the_scenario,
"no_modes", mode)
# build the network inline since the only thing that changed is network artificial link costs
logger.info("Building the network again with new impedences")
arcpy.BuildNetwork_na(
os.path.join(the_scenario.main_gdb, "Network/Network_ND"))
# do the routing
logger.info("Do the routing again.")
try:
ftot_routing.initial_routing(the_scenario, logger)
except:
logger.warning(
"WARNING: the routing has no valid routes on the pipeline mode.")
logger.result(
"WARNING: the routing has no valid routes on the pipeline mode.")
get_main_db_route_info(the_scenario, logger)
get_route_cache_db_route_info(the_scenario, logger)
temp_end_time = datetime.datetime.now()
temp_total_time = temp_end_time - temp_start_time
logger.result("END TEST 5: pipeline only. Total time: {:.10}".format(
temp_total_time))
def calculateNetworkServiceArea(inFacilities, roads, workspace):
#allow overwrite table on
arcpy.env.overwriteOutput = True
#set new workspace as the input workspace
arcpy.env.workspace = workspace
#check that the projections of feature classes align
spatial_ref1 = arcpy.Describe(inFacilities).spatialReference
spatial_ref2 = arcpy.Describe(roads).spatialReference
if spatial_ref1.name != spatial_ref2.name:
print(inFacilities + " needs to be projected as " + roads + " to match the coordinate system of the clip feature class.")
print(inFacilities + " is projected as " + spatial_ref1.name + " and " + roads + " is projected as " + spatial_ref2.name)
else:
print("The coordinate systems for both layers match.")
#check that the feature classes are the correct type
#roads should be polyline shapefile
#facilties (schools) should be a point file
#use try to identify errors in the types of data
try:
#use the describe function to determine the element data type
desc_inFacilities = arcpy.Describe(inFacilities)
desc_roads = arcpy.Describe(roads)
if desc_inFacilities.shapeType != "Point":
print("Error shapeType: ", inFacilities, "needs to be a point type!")
sys.exit(1)
if desc_roads.shapeType != "Polyline":
print("Error shapeType: ", roads, "needs to be a polyline type!")
sys.exit(1)
#define folder pathway
folder = workspace
#create geodatabase name
out_name = "myGeodatabase.gdb"
#Create a geodatabase using arcpy
arcpy.CreateFileGDB_management(folder, out_name)
#pass input shapefiles into feature class in geodatabase
inFeatures = inFacilities
inFeatures2 = roads
outLocation = "myGeodatabase.gdb"
outLocation2 = "myGeodatabase.gdb"
outFeatureClass = "inFacilities"
outFeatureClass2 = "roads"
#pass input facitilies into geodatabase
arcpy.FeatureClassToFeatureClass_conversion(inFeatures, outLocation,
outFeatureClass)
#pass input roads into geodatabase
arcpy.FeatureClassToFeatureClass_conversion(inFeatures2, outLocation2,
outFeatureClass2)
#test for existence of the geodatabse
if arcpy.Exists(myGeodatabase):
#set workspace to user input geodatabase
arcpy.env.workspace = myGeodatabase
print("Environment workspace is set to: ", myGeodatabase)
else:
print("Workspace", myGeodatabase, "does not exist!")
sys.exit(1)
#set variable for the road network
roads_shp = folder + roads
#describe the road shapefile
desc = arcpy.Describe(roads_shp)
#check to make sure that network analysis extension is enabled
arcpy.CheckOutExtension("network")
#create new featuredataset
arcpy.CreateFeatureDataset_management(arcpy.env.workspace, "featuredataset", desc.spatialReference)
#copy features to the new dataset
arcpy.CopyFeatures_management(roads_shp, "featuredataset/roads")
#create network dataset in an exisiting feature dataset
arcpy.na.CreateNetworkDataset("featuredataset", "roads_ND", ["roads"])
#constructs the network connectivity and also attribute information of a network dataset
arcpy.BuildNetwork_na("featuredataset/roads_ND")
#use make serivce area layer
#define variables
network = os.path.join(myGeodatabase, "inFacilities", "roads_ND")
layer_name = "schoolRoadNetwork"
impedance = "distanceAway"
#set variables for 600, 1200, and 1800 meters
#generate polygons as rings
#use this function to set analysis properties of the netwrok service area and determine accessibility to schools based on roads
result_object = arcpy.na.MakeServiceAreaLayer(network, layer_name,
impedance, "TRAVEL_FROM", "200 400 600 800 1000 1200 1400 1600 1800 2000",
"DETAILED_POLYS", "MERGE", "RINGS")
Reader.updateRow(row)
del row
del Reader
###########################
arcpy.SetProgressorPosition(90)
#Poistetaan tiedostosta turhat kentät:
arcpy.DeleteField_management(
LiikenneElementit,
"JuncType;JuncType2;JuncType3;JuncType4;JuncType5;DynTyyppi")
msg("Aikasakot laskettu!")
arcpy.SetProgressorPosition(95)
Valmis()
msg("----------------------")
msg("Build Network Dataset")
arcpy.SetProgressorLabel("AIKASAKKOJEN LASKENTA...Build Network Dataset...")
Aloitus()
#Buildataan NetworkDataset uudestaan, jolloin se on heti valmis käytettäväksi:
arcpy.BuildNetwork_na(NetworkData)
Valmis()
arcpy.SetProgressorPosition(100)
msg("----------------------")
msg("VALMIS! Nyt käyttämääsi Network Datasettiin on laskettu todenmukaisemmat läpiajoajat sarakkeisiin: Kokopva_aa, Keskpva_aa sekä Ruuhka_aa."
)
msg("Network Dataset on nyt valmis käytettäväksi reititysanalyyseihin.")
msg("Halutessasi voit suorittaa 4. työvaiheen, jossa otetaan matka-ajan lisäksi huomioon kävelyyn sekä parkkipaikan etsintään kuluva aika (Kokonaismatkaketju)."
)
msg("----------------------")
def calculateNetworkServiceArea(inFacilities, roads, workspace):
import arcpy
import sys
arcpy.env.overwriteOutput = True
try:
##Create new gdb
arcpy.CreateFileGDB_management(workspace, 'serviceArea.gdb')
arcpy.env.workspace = 'serviceArea.gdb'
except:
raise NameError('Input workspace does not exist!')
try:
arcpy.CheckOutExtension("network")
except:
print("Network Analyst Extension not available")
## Check input feature class spatial reference
roads_desc = arcpy.Describe(roads)
roads_desc_name = roads_desc.spatialReference.name
facilities_desc = arcpy.Describe(inFacilities)
facilities_desc_name = facilities_desc.spatialReference.name
if roads_desc.shapeType != 'Polyline':
raise TypeError('Roads must be a Polyline!')
if facilities_desc.shapeType != 'Point':
raise TypeError('Facilities must be a Point!')
if roads_desc_name != facilities_desc_name:
print(
"Projections do not match, updating inFacilities in inFacilities_reprojected to match roads: "
+ roads_desc_name)
arcpy.management.Project(inFacilities, 'inFacilities_reprojected',
roads_desc.spatialReference)
inFacilities = arcpy.env.workspace + '/inFacilities_reprojected'
print(
"Projection updated, both inFacilities and roads are projected in: "
+ roads_desc_name)
else:
print("Input feature class spatial references match.")
## Create feature dataset
arcpy.CreateFeatureDataset_management(arcpy.env.workspace,
'featuredataset',
roads_desc.spatialReference)
## Copy input feature classes to featuredataset
arcpy.CopyFeatures_management(roads, 'featuredataset/roads')
arcpy.CopyFeatures_management(inFacilities, 'featuredataset/inFacilities')
## Create network dataset and build the network
arcpy.na.CreateNetworkDataset('featuredataset', 'roads_ND', ['roads'])
arcpy.BuildNetwork_na('featuredataset/roads_ND')
## Generating the Service Area Layer with service areas from 200 - 2000 meters, increasing at 200m intervals.
routeLy = arcpy.na.MakeServiceAreaLayer(
'featuredataset/roads_ND',
'myRoute',
'Length',
"TRAVEL_FROM",
'200 400 600 800 1000 1200 1400 1600 1800 2000',
'DETAILED_POLYS',
'MERGE',
'RINGS',
overlap="OVERLAP",
hierarchy="USE_HIERARCHY")
## Standard processing features
routeLayer = routeLy.getOutput(0)
na_classes = arcpy.na.GetNAClassNames(routeLayer, 'INPUT')
field_mappings = arcpy.na.NAClassFieldMappings(routeLayer,
na_classes['Facilities'])
field_mappings['Attr_Length'].defaultValue = 0
arcpy.na.AddLocations(routeLayer, na_classes["Facilities"],
"featuredataset/inFacilities", field_mappings)
## Compute the service areas
arcpy.na.Solve(routeLayer)