Latest Contributions by JaySandhu

You do not need to specify an impedance cutoff on the analysis layer if your demand points already have that property specified. You may need to set it if there are some demand points that do not have that cutoff defined and you want an overall cutoff for that analysis. Make sure you are solving on the same impedance attribute that you loaded the cutoff for. Jay Sandhu ... View more

The free street data that comes with the ArcGIS software is not the most current data available. Better and more current datasets are available for purchase in the form of StreetMap Premium products. Details here: http://www.esri.com/data/streetmap As far as merging two different datasets goes, that is not a simple straightforward task. The GP tool, Integrate, can help in joining data. http://resources.arcgis.com/en/help/main/10.1/index.html#//00170000002s000000 Regards, Jay Sandhu ... View more

Here is an example of missing connections. An these are major highways like I said. [ATTACH=CONFIG]24075[/ATTACH] Can you provide the spatial extent or city/street name for the posted image? Jay Sandhu ... View more

How big are your service areas? From the help here: http://resources.arcgis.com/en/help/main/10.1/index.html#//004700000048000000 Trim Polygons�??The polygons containing the network edges at the periphery of the service area can be further trimmed to be within the specified distance of these outer network edges. By default, this value is 100 meters. You should set the trim to a reasonable distance. For example, if you are making 500 meter service area polygons, choose 25 to 50 meter trim. If there is one location that is not working, is it only because you turn on the trim? If yes, then change trim size. Jay Sandhu ... View more

Jamie, First, a demand point can only be allocated to one facility. So if a demand point has 10 amount of demand and the facility only has a capacity of 8 then that point will not be allocated. That is, a fractional demand of 8 will not be split out and assigned to one facility and rest 2 to another facility. If you need to solve such problems then you could split the demand yourself. That is, enter the demand point more than once with less demand, e.g. enter it as 5 points with demand of 2 each. Similarly two facilities cannot be assigned to the same demand point. Now for the Maximum Capacitated Coverage, after the solve, the facilities table has DemandCount and DemandWeight fields. The DemandCount tells you how many demand points were allocated to that facility, e.g., 4. The DemandWeight will tell you the amount of demand (summed from the 4 demand points) that were assigned to the facility. If the demand weight is 1, then it will also be 4 in this example. The amount of DemandWeight assigned to a facility cannot exceed it's capacity. The Total_Length tells you the sum of shortest path lengths from each demand point to the facility. On the Lines table, you will see the individual assignment. That is, which demand point is allocated to which facility and the individual distance to it. As to what is demand weight? It is amount of "things" at that demand location. For example, a house hold (demand point) may have 3 school going children that need to be assigned to a school. So 3 will be the demand weight. Regards, Jay Sandhu ... View more

You are using the right tool (If I understand the problem correctly). And the information you are looking is available. It is on the facilities table. Each chosen facility has fields that tell you how many demand points and sum of demand assigned to them. You can sum up the total demand and the total supply and the total demand allocated and do the division to find the percentages. ... View more

Door to door routing (high density routing) is typically solved with a different type of optimization called the Chinese Postman Problem. You will probably not get as good a result with the reorder stops option. At a minimum set the curb approach to right-side and set no u-turns allowed except at dead ends and you may get reasonable routes. Jay Sandhu ... View more

If you want to find the best way to visit a set of locations, then you can turn on the "Reorder Stops to Find Optimal Route" option on the route analysis layer's properties (analysis tab). This capability is called the Traveling Salesman Problem. http://resources.arcgis.com/en/help/main/10.1/index.html#/Route_analysis/004700000045000000/ To get good results, make sure to set the curb approach property of each stop (right side, etc) and also note that this will work well for a set of locations spread over some area. What is your application for the routes you are trying to generate? Jay Sandhu ... View more

Glad to know the VBA worked for you. It lists the edges that are stored in the network. It should be same as the number of arcs in your shape file. is your network dataset  up to date? That is, have you edited your shape file and not re-built the network? Jay Sandhu ... View more

The network topology, that is, the from/to junctions for each edge is stored in the binary files of the network dataset. In general you do no need this information. May I ask what you intend to do with that information? The way to get this information is to use ArcObjects to retrieve the values from the network dataset. I am including a small VBA that you can run (if you have VBA installed) and it will write out the edge OID and the two from/to junction OIDs to a text file. Make sure the network dataset is added to ArcMap as the first layer when you run this VBA. Jay Sandhu Public Sub List_ND_Topology_ToDisk()   Dim pMxDoc As IMxDocument   Set pMxDoc = ThisDocument     Dim pNLayer As INetworkLayer   Set pNLayer = pMxDoc.FocusMap.Layer(0)     Dim pND As INetworkDataset   Set pND = pNLayer.NetworkDataset     Dim pNQ As INetworkQuery   Set pNQ = pND       Dim pEnumNE As IEnumNetworkElement   Set pEnumNE = pNQ.Elements(esriNETEdge)     Dim pFromJunction As INetworkJunction   Set pFromJunction = pNQ.CreateNetworkElement(esriNETJunction)     Dim pToJunction As INetworkJunction   Set pToJunction = pNQ.CreateNetworkElement(esriNETJunction)     Dim pNE As INetworkElement   Set pNE = pEnumNE.Next     Dim pNEdge As INetworkEdge   Set pNEdge = pNE   Dim i As Integer Open "c:\temp\ND_FromTo.csv" For Output As #1 'set path as needed Print #1, """EdgeOID"", ""FromOID"", ""ToOID"", ""Lenght_Attribute"""   Do Until pNE Is Nothing     pNEdge.QueryJunctions pFromJunction, pToJunction     Print #1, pNE.OID; ","; pFromJunction.OID; ","; pToJunction.OID; ","; pNE.AttributeValue(1)     Set pNE = pEnumNE.Next   Loop    Close #1    End Sub ... View more

Just looking at the picture, it looks like an odd shape. But hard to understand what it going on without seeing more. So what version of the ArcGIS software are you using and what network data are you using. Where is the point located? Jay Sandhu ... View more

Have you looked at using the free streetmap data that comes with ArcGIS and is available for routing out for the entire country? It is on the data and maps dvd that comes with ArcGIS. You can also search for the open source street data to see if they have anything for the area you are looking for. Jay Sandhu ... View more

You should use the Vehicle Routing Problem solver. First, read about it here: http://resources.arcgis.com/en/help/main/10.1/#/Vehicle_routing_problem_analysis/00470000004v000000/ Run through the tutorials to get familliar with it: 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/ You will need to model your vehicles in a slightly different way. Since you want to reuse the trucks, enter them more than once so that they can be reused to go back for another load. Jay Sandhu ... View more