Latest Contributions by JaySandhu

‎10-31-2012

Esri does provide a North American dataset ready for routing. It is called Streetmap and it is included in the data and maps DVD that comes with the ArcGIS software. Alternatively you can also download it from Esri's customer care portal. Note that it is a read-only dataset and it is ready to route. It is not the most current data, but it is free. The standard toolbar has the Find Route tool and that can use the online network dataset to find routes. But it is not available for any other analysis. If you are getting convoluted routes that usually means the impedances are not set up properly and may be all zero. You can use the network identify tool, second icon from right on the NA toolbar to click on an edge and inspect its impedance values and how it is connected. Most likely you added a length impedance and then did not map it to any fields using the Evaluators button. Once you have a network dataset set up, you should look at the Vehicle Routing Problem solver and the Location-Allocation solver to help you analyze the routes and/or location of the mills. Jay Sandhu

‎10-22-2012

Is there some way to set a variable penalty at a junction that is determined by direction of travel? A junction only has one cost for going though it. It does not/can not differentiate the travel direction. So you have to use the edges to define the from/to travel direction. Jay Sandhu

‎10-19-2012

OD Cost Matrix by design does not return back the route geometry for performance reasons. You can use the Closest Facility solver for that purpose. Load your Origins as Incidents and Destinations as Facilitiies and then change the number of facilities to find from the default 1 to the number of destinations you have and solve. it will compute all the routes and return back the route geomtries as well. Jay Sandhu

‎10-19-2012

Location-allocation in ArcGIS 10.1 can honor capacity with the Maximize Capacitated Coverage problem type. See here for more info: http://resources.arcgis.com/en/help/main/10.1/#/Location_allocation_analysis/004700000050000000/ If you have a previous version, then location-allocation did not have a way to honor capacity of your facilities. In that case you use the following tools to solve the capacitated Allocation problems: http://resources.arcgis.com/gallery/...2-008CC5F9D24F Jay Sandhu

‎10-11-2012

One way to solve this is to locate the stops near interesections to the intersection itself. You can do this by bringing up the route properties and on the network locations tab, in the "Snap To:" section, check on only the junctions. and set the search tolerance to 200 feet (or what ever you want it to be). Now load your stops. Many stop will be unlocated. Now change the settings back to locating on the streets, reset the search tolerance, and in the NA Window, right-click on the orders and choose to "Recalculate Location Fields" for the unlocated stops. Now you can solve the VRP layer. Jay Sandhu

‎10-11-2012

You can take a look at the following tutorials on VRP: http://resources.arcgis.com/en/help/main/10.1/#/Exercise_7_Servicing_a_set_of_orders_with_a_fleet_of_vehicles/004700000062000000/ and http://resources.arcgis.com/en/help/main/10.1/#/Exercise_8_Finding_best_routes_to_service_paired_orders/004700000063000000/ and you can also watch this video: http://video.arcgis.com/watch/686/vehicle-routing-problem-example-appliance-delivery and VRP can be accessed on the web by publishing a service on ArcGIS server and using that. More details on creating a VRP service in 10.1 are here: http://resources.arcgis.com/en/help/main/10.1/#/What_s_new_in_the_ArcGIS_for_Server_Network_Analyst_extension/01540000051v000000/ Jay Sandhu

‎10-11-2012

if a stop is within X feet of intersection, then the route must not go directly past this point I am having a hard time understanding what this means. Can you explain what yor are trying to achieve? That is, a route only goes up to point where it snapped/located on the road network. Jay Sandhu

‎10-10-2012

Just loading 13,000 demand points should not be slow. Are you using a shape file based network dataset? Perhaps you may need to create a spatial index on the input streets feature class (or in the file gdb). Also note that if you do not have a meaningful distance cutoff, it will try to create a 13,000 by 13,000 od cost matrix to solve the location-allocation and may run out of memory unless you are using 10.1 on a 64 bit OS machine with at least 4 GB or RAM. Jay Sandhu

‎10-09-2012

If you have ArcGIS 10.1, then use location-allocation with the Maximize Capacitated Coverage problem type. If you have a previous version, then location-allocation did not have a way to honor capacity of your facilities. In that case you use the following tools to solve the school allocation problem: http://resources.arcgis.com/gallery/file/geoprocessing/details?entryID=C4E79AE3-1422-2418-88B2-008CC5F9D24F Jay Sandhu

‎10-09-2012

In your source feature class, you can code the restrictions in what ever scheme you like, for example, 0 or 1, Y or N, etc. When you start to add the restriction attributs in the Network Dataset create wizard, you can figure out how best to assign these fields to the restriction attribute. The restrictions can be prohibit, avoid and prefer. Please do not confuse these with hierarchy. Avoid means to avoid the road but use it if there is no other choice. A prefer road would be like a pedestrian friendly road that you want to use rather than avoid. You can read more about the restrictions here: http://resources.arcgis.com/en/help/main/10.1/index.html#//00470000000m000000 You can also look at the tutorial datasets: Paris, San Diego and San Francisco and see how they have set up the restrictions. Jay Sandhu

‎10-08-2012

I replied to your answer in your other thread. The CF layer does not have a way to pair up some incident with some facilities exclusively. You can do route between pairs of points using the routename property, but nothing about N to M locations where some M only go to some N. Regards, Jay Sandhu

‎10-08-2012

You need to do this one choosen location at a time. So create a Closest Facility layer, load the first chosen facility from Location-Allocaiton layer as the Incident. Then from the LA layer, select all the demand points allocated to this facility and load as facilities in the CF layer. Solve for all. Export/save the lines. Either remove the incidents/facilities in the layer and repeate the process or create a new CF layer for the next choosen facility. Jay Sandhu

‎10-08-2012

In hierarchy, lower number means higher level road. So 1 would be interstate, 4 could be surface roads. However, since you are putting together a pedestrian network, do not add a hierarchy. That is only useful for long distance, cross-country routes. For small walk/transit routes you are looking at a few miles of travel and hierarchy will be of no benefit. Jay Sandhu

‎10-03-2012

You can solve the route with options of outputting either a true shape or straight line. So you can add two double fields to your output route line sub class called routelength and straightlength. Solve the route with true shape and then use the field calculator to calculate the geometry (length) for the routelength field and then change the route property to output straight line and then use the field calculator to calculate the geometry (length) for the straightlength. Make sure you are in a projected view (not geographic coordinates) for the field calculator/calculate geomtry option to work for computing the lenght of the lines. Jay Sandhu

‎10-02-2012

I was wondering: would it be possible to restrain the routes to one interchange only Not sure what that means. Can you describe what you want to achieve? Jay Sandhu

Online Status	Offline
Date Last Visited	‎05-29-2026 01:54 PM

My Ideas

Latest Contributions by JaySandhu

Re: Network Analyst Basics

Re: Variable Penalty for a "vertical" junction

Re: OD Cost Matrix - Routes

Re: Location - Allocation Alternatives

Re: Generating routes that don't go directly to every stop?

Re: VRP - MaxOrderCount Limt of 1,000?

Re: Generating routes that don't go directly to every stop?

Re: school enrollment boundaries

Re: school enrollment boundaries

Re: Network Analyst - Restrictions and Hierarchies

Re: Closest Facility question

Re: Location - Allocation Line shapes

Re: Network Analyst - Restrictions and Hierarchies

Re: How do you calculate Route Directness?

Re: Activities accessible by public transport

Re: Creating a maximum walkshed around each point

Re: Closest Facility - Remove Facilities and Incid...

Re: Polygons for Best Dump Site By Site Cost and T...

Re: Delay in routes

Re: Delay in routes