This question relates to my use of Network Analyst extension, but has an editing component to it. I need to determine the direction of which my street lines were created. What direction is taken from the first edited point to the last? Network Analyst is using a bunch of To and From information to create historical traffic patterns based on the street side edges. However, my Street Centerline was a file from our County government. So, I am not fully sure that they consistently have the lines flowing in the same direction. My eventual use is to compare the direction the street was digitized to determine a To/From direction for the lines. Then attribute my GPS data, with a heading, to the appropriate To/From edge of the line. Any ideas?
You can visualize the digitized direction of your streets by using a line symbol that places an arrow in the middle of the road, for example pick a line symbol like the one titled: Arrow Right Middle. You can also draw the network dataset symbolized with the directions in which the lines are restricted based on a restriction attribute such as oneway. Bring up the properties of the network dataset (added to the ArcMAP table of contents) and click on Symbology tab and turn on edges and pick the arrow symbols and customize as needed. More help here: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/The_network_dataset_layer/0047000001r4... Jay Sandhu
I am trying to do this programmatically. I have roughly 93,000 street segments and over 10 million GPS data points. So I need someway of generating the cardinal direction as an attribute. Unless there is a better way to attribute the information over.