Created
December 30, 2015 22:42
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This script will take the centerline layer, and copy the assetIDs of all intersecting points to the attribute table of the centerline layer. It will also make sure that merged intersections are appropriately accounted for as well.
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| import arcpy | |
| from arcpy import env | |
| ##### Input ##### | |
| env.workspace = "Z:/GIS/DataLibrary/Transportation/BOE_Centerline_Intersections150930/collisiontoInt_test.gdb" | |
| env.overwriteOutput = True #so we can rerun this script and overwrite our output feature class | |
| #input fc | |
| col_fc = "Collisions_2009to2013" | |
| input_centerline_fc = "Street_Centerline_Raw" | |
| int_fc = "MergedIntersections" | |
| boe_int_dup = "boe_int_duplicate" | |
| #create layers for analysis | |
| centerline_fc = "Street_Centerline" | |
| boe_int_dup_lyr = "boe_int_dup_lyr" #new feature lyr for duplicate points | |
| arcpy.FeatureClassToFeatureClass_conversion(input_centerline_fc, env.workspace, centerline_fc) #create edited fc | |
| arcpy.MakeFeatureLayer_management(col_fc, "col_lyr") | |
| arcpy.MakeFeatureLayer_management(centerline_fc, "centerline_lyr") | |
| arcpy.MakeFeatureLayer_management(int_fc, "int_lyr") | |
| arcpy.MakeFeatureLayer_management(boe_int_dup, boe_int_dup_lyr) #create a feature layer for duplicate points. export to fc later | |
| ##### Create Lists of Merged Intersections ##### | |
| AssetID_Replaced = [] | |
| CLNodeID_Dropped = [] | |
| maxValue = arcpy.SearchCursor(boe_int_dup_lyr, "", "", "", "FEAT_SEQ D").next().getValue("FEAT_SEQ") #Get max FEAT_SEQ | |
| for i in range(1, maxValue + 1): #loop through each FEAT_SEQ, from 1 to the max | |
| query = "\"FEAT_SEQ\" = " + str(i) | |
| print query | |
| arcpy.SelectLayerByAttribute_management(boe_int_dup_lyr, "NEW_SELECTION", query) | |
| rank1 = arcpy.SearchCursor(boe_int_dup_lyr).next().getValue("ASSETID") #get the top ranked feature for each similar intersection | |
| for row in arcpy.SearchCursor(boe_int_dup_lyr): | |
| CLNodeID_Dropped.append(int(row.CL_NODE_ID)) | |
| AssetID_Replaced.append(int(rank1)) | |
| arcpy.SelectLayerByAttribute_management (boe_int_dup_lyr, "CLEAR_SELECTION") #clear selection so that the conversion includes all rows | |
| ##### Create and Populate Intersection Fields ##### | |
| arcpy.AddField_management("centerline_lyr", "int1", "LONG", field_length = 10) #add the fields that will store all intersecting assetIDs | |
| arcpy.AddField_management("centerline_lyr", "int2", "LONG", field_length = 10) #especially around freeways, it is sometimes the case that | |
| arcpy.AddField_management("centerline_lyr", "int3", "LONG", field_length = 10) #there are multiple interesction points along a line segment | |
| arcpy.AddField_management("centerline_lyr", "int4", "LONG", field_length = 10) | |
| arcpy.AddField_management("centerline_lyr", "int5", "LONG", field_length = 10) | |
| arcpy.AddField_management("centerline_lyr", "int6", "LONG", field_length = 10) | |
| arcpy.AddField_management("centerline_lyr", "int7", "LONG", field_length = 10) | |
| arcpy.AddField_management("centerline_lyr", "int8", "LONG", field_length = 10) | |
| arcpy.AddField_management("centerline_lyr", "int9", "LONG", field_length = 10) | |
| arcpy.AddField_management("centerline_lyr", "int10", "LONG", field_length = 10) | |
| centerline_cursor = arcpy.UpdateCursor("centerline_lyr") | |
| for row in centerline_cursor: | |
| obj = "OBJECTID=%s" % (row.OBJECTID) | |
| print obj | |
| #select the line segment | |
| arcpy.SelectLayerByAttribute_management("centerline_lyr","NEW_SELECTION",obj) | |
| #select all intersections that intersect with each line segment | |
| arcpy.SelectLayerByLocation_management("int_lyr","INTERSECT","centerline_lyr",selection_type="NEW_SELECTION") | |
| #create a new search cursor to loop through each of the selected intersections | |
| #for each intersection, add a field to the selected centerline feature | |
| int_cursor = arcpy.UpdateCursor("int_lyr") | |
| ct=0 | |
| for row2 in int_cursor: | |
| print int(row2.ASSETID) | |
| ct += 1 | |
| name = "int%d" % (ct) | |
| print name | |
| row.setValue(name, int(row2.ASSETID)) | |
| centerline_cursor.updateRow(row) | |
| print str(int(row2.ASSETID)) + " finished!" | |
| #if the TO/FROM includes cl node id, +1, row.setValue | |
| if int(row.INT_ID_FRO) in CLNodeID_Dropped: | |
| index = CLNodeID_Dropped.index(int(row.INT_ID_FRO)) | |
| ct += 1 | |
| name = "int%d" % (ct) | |
| row.setValue(name, AssetID_Replaced[index]) | |
| centerline_cursor.updateRow(row) | |
| print("REPLACED AN ID!!!") | |
| if int(row.INT_ID_TO) in CLNodeID_Dropped: | |
| index = CLNodeID_Dropped.index(int(row.INT_ID_TO)) | |
| ct += 1 | |
| name = "int%d" % (ct) | |
| row.setValue(name, AssetID_Replaced[index]) | |
| centerline_cursor.updateRow(row) | |
| print("REPLACED AN ID!!!") | |
| del centerline_cursor, int_cursor | |
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