Latest Contributions by JaySandhu

Most likely your data has disconnected areas. You could create a service area layer, load your 5 incidents and do a 10 or 15 minute service area (turn on the Lines as well) and see if you can reach other parts of the network. Since you clipped it out of street map, how about using the original street map with your problem instance to see if that will give you the paths you need? Jay Sandhu ... View more

The closest facility sovler finds the specified number of facilities from each incident. So if you have 34 incidents and 5 facilities, set the CF properties to find 5 facilities and solve. if you are getting less than your 34 times 5 or 170 routes, then there is probably some network dataset issue that says there are no paths between your sets of locations. This could be due to some barrier or other restrictions or could be bad connectivity in your data. So what network dataset are you using and what restrictions do you have on? Jay Sandhu ... View more

What network dataset are you using? Does it support hierarchy and was the hierarchy set to be on? And how far apart are the points from each other? Perpahs some points are not connected and thus the entire network is being searched (if hierarchy is not can run out memory) and you may need to put a cutoff. You can follow the suggestions in the following KB article to see if it will solve your problem: http://support.esri.com/en/knowledgebase/techarticles/detail/38435 Also do you just need the distances between the points or do you need the actual route geometry for the routes. If it is distances only you can use the OD solver instead of the CF solver. Jay Sandhu ... View more

You can use the Closest Facility solver for this. Load in your 12 sources as Incidents and your 600 destinations as Facilities and on the solver properties have it solve for all 600 destinations. This will solve 12 by 600 or 7,200 routes in one solve. Jay Sandhu ... View more

Joe, Any vertex connectivity maybe useful if all your data was planar. In that case you could maintain some longer roads without breaking them at every T intersection. Some data formats such as the the Open Street Map are built using this model. However, it is not a good choice for non-planar data such as highway intersections with ramps, underpass, overpass situations as Integrate will put a vertex on these overlapping and crossing lines and then the Any Vertex connectivity will connect them! it is just another connecivity model and if data comes that way, we support it! Jay Sandhu ... View more

When you create the network dataset, what connectivity model did you choose: End Point or Any Vertex? If it is End Point, then you will not get the node to connect to a middle of an edge as shown in your picture. In that case, switch to Any Vertex and re-build your network. Regards, Jay Sandhu ... View more

First get familliar with Network Analyst following Joe's suggestion. Assuming you have a road network dataset (If not, use the free one that comes on the Data and Maps DVD called SDC street network for entire USA). Add the network to ArcMap, add your office point locations to Arcmap, Create a location-allocation layer, Load your points as both Facilities and Demand. And then solve for two facilities. This will give you two offices out of your 20 that minimize the travel to others. Jay Sandhu ... View more

Christy, Snow plow routing as you describe it is technically called a Chineese Postman Problem or Euler Tour where you have to visit every edge (not discrete locations) with a variety of constraints. Network Analyst does not have a solver to do this as efficently as you may want to do it. An attempt can be made by using the Vehicle Routing Problem solver with a set of constraints to do it but may not be what you want. So I would not recommend you getting Network Analyst for it (but you could probably an evaluation copy to try out if needed). The best product out there for this kind of work is by a company called RouteSmart and it works in conjunction with ArcGIS. You can read more about that here: http://www.routesmart.com/publicworks.aspx Regards, Jay Sandhu ... View more

Maybe this should be entered as a help ticket? Just wanted to check the user community first to see if anyone had a quick suggestion. Thx. For large service areas such as 600 minutes the service area can run out of memory especially in dense street network areas. For 10.1 we have added a hierarchical option to service area that will solve much larger problems very quickly. You can sign up for ArcGIS 10.1 beta (comming out very shortly) and use it to solve with your data. Jay Sandhu ... View more

I also got the same problem. It happened when I tried to run service area in Network analysis function. My facilities was downloaded about 600 places with the 90 km. service area. If anyone know how can I solve this problem, please let me know. Many thanks, Greaty You can solve the 600 places with 90 Km service area by following the suggestions in the following KB article: http://support.esri.com/en/knowledgebase/techarticles/detail/38426 Jay Sandhu ... View more

It is possible to do what you want to do. You can read more on routing in 3D buildings (room to room) here: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00470000005q000000.htm The data for this is in the network analyst tutorial folder. Their is a locator to geocode to "rooms". That is, you can build your own locator for addressing to rooms. And you can build multi-modal networks that connect various modes of transportation outside the buildings. Take a look at this turorial for example of multi-modal network: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Exercise_2_Creating_a_multimodal_network_dataset/00470000005v000000/ I will suggest that you read the following blog on this as well: http://blogs.esri.com/Dev/blogs/arcgisdesktop/archive/2011/05/27/What-do-you-get-when-you-cross-the-3D-Analyst-extension-with-the-Network-Analyst-extension_3F00_.aspx And there are others doing this as well, e.g., http://proceedings.esri.com/dvd/uc/2009/uc/papers/pap_1110.pdf Regards, Jay Sandhu ... View more

Glad you figured out that you needed to create the spatial index on the streets feature class. If you are new to GIS, I will suggest that you explore our web sites as they have lots of training, podcasts, etc Try: http://www.esri.com/news/podcasts/index.html or http://training.esri.com/gateway/index.cfm?fa=trainingOptions.gateway Good luck, Jay Sandhu ... View more

You can contact your Esri rep/local office and request it, or see the details here to sign up: http://blogs.esri.com/dev/blogs/arcgis/archive/2011/06/07/arcgis-10.1-beta-1.aspx Regards, Jay Sandhu ... View more

Did you create the network dataset? Is it possible that the points you are loading as restrictions are a source in your network dataset? You can check by bringing up the properties of the network in Catalog and clicking on the source tab and see what is listed there. Normally it should be a line feature class. If the points are there as well then you should remove them and re-build your network. If that is the case, the points probably not connected to anything and then when you load your restrictions they get snapped to these stand alone junctions and do not restrict any edges. A second thing to check is to bring up the properties of your Route layer and click on the Network Location tab and then look at the "Snap To:" settings. It should be Closest and only the streets line feature class should be checked on for Shape. DO NOT check on snapping to everything, just the streets. A third thing that can happen is if the barrier points have pre-existing stale network locations. So when you load your barriers When you load the barriers, in the load dialog, see what is checked on under the Location Position. It should be the "Use Geometry" and not the "Use Network Location Fields" Regards, Jay Sandhu ... View more

540 Minute service areas are very large and will most likely not work in dense parts of the country. As far as trim goes, I think a 500  meter trim is reasonable for large service areas. In ArcGIS 10.1 we have added support for Hierarchy in the Service Areas which means it will solve very large service areas very quickly by travelling on the upper level roads. You can get on the Beta program and try out this functionality. The beta for ArcGIS 10.1 is coming out very soon. Jay Sandhu ... View more