Latest Contributions by JaySandhu

‎03-17-2014

Both tools can give you travel time and distance between a set of locations. You can solve on travel time attribute and accumulate a distance attribute at the same time. However neither will give you "round trip". That is, the route solver will solve A to B. It will not solve for A to B back to A. To do that you will have to add the start point again as the last point. OD returns back a matrix so if you have 3 points, it will return back 9 shortest path distances. Say your points are A, B and C. You will get: A to A A to B A to C B to A B to B B to C C to A C to B C to C in this way, if you need the round trip distance from A to B back to A, you can get the two columns A to B and B to A and sum them up. The choice between the route and OD solvers will depend on how your input data is structured. Jay Sandhu

‎03-17-2014

Do you have hierarchy defined for your network? IF yes, is it being used? Perhaps the streets in the hierarchy are not connected in the full network causing the network search space to the different. You could try turning off the hierarchy to see if you will get the paths in the larger network. Also, are the restrictions set up the same way in both the network as they can also cause some locations not to be reached. Jay Sandhu

‎03-17-2014

If loading your stops is taking a long time then perhaps you are missing some spatial index on the street data being used in the network. If the time is spent some where else, then please specify what step is taking long to complete. BTW, you can use the GP tool Calculate Locations to pre-compute the network locations and then use Add Locations to load the Stops (using the Network Locations and not geometry) if you plan to reuse the points over and over again AND the network dataset is not being re-built during that process. Jay Sandhu

‎03-17-2014

Service area polygons are at some level "art" of what can be covered by the specified break value. The shape is influenced by a number of factors, such as, hierarchy, generalized/detailed, trim distance, etc. To see what is really the service area, make sure to turn on the Line Generation and use that to compare against the closest facility results. They should match. In general, turn off hierarchy, set polygon type to Detailed and set a small trim distance (default 100 m may be ok based on the break value used) to get more accurate polygons. Jay Sandhu

‎02-28-2014

You cannot Create a new network dataset in geoprocessing or model builder. You can however "build" an already created network dataset with the Build Network tool. http://resources.arcgis.com/en/help/main/10.2/index.html#//00480000000v000000 -Jay Sandhu

‎02-27-2014

You have to add (load again) the start location a second time as the ending location to return back to it. Jay Sandhu

‎02-20-2014

Bring up the properties of the service area layer and on the polygon generation tab there is a section for Multiple Facilities Options and you can click on the Not Overlapping method. This will split the overlapping areas between two facilities at equal distance (or time) and only generate the polygons along the equal distance line. More help here in the Multiple facilities options: http://resources.arcgis.com/en/help/main/10.2/#/Service_area_analysis/004700000048000000/ Jay Sandhu

‎02-05-2014

I think you should try using the Route solver with the Routename property rather than the VRP solver. It is easier to set up, that is two load locations on the data you already have set up and it is ready to solve. Jay Sandhu

‎02-03-2014

Use the Routename property to solve for routes between pairs of points. See http://forums.arcgis.com/threads/12128-add-origin-amp-destination-locations-from-the-same-row-to-a-route-analysis-layer?highlight=routename Jay Sandhu

‎02-03-2014

Once you have run through the tutorial to understand the basics of using the streetmap data with the route solver then to do routing between pairs of points use the ROUTENAME property of the route sovler. To learn more about it, search the forums for this keyword as it has been discussed many times, e.g., http://forums.arcgis.com/threads/12128-add-origin-amp-destination-locations-from-the-same-row-to-a-route-analysis-layer?highlight=routename Jay Sandhu

‎01-28-2014

I would suggest that instead of spiting based on destinations, split the data based on origins. So do a 1K origins by 3K destinations and repeat 30 times instead of 30K by 500 destinations. Reason being the OD solver is solving 1 by N as a single solve so i is more efficient to solve for all destinations from origins. Also what is the distribution of the data? That is are all the locations in a single city? Say within a 20 or 30 miles or spread out more? Is hierarchy on or off? If the data is confined to a small area like 30 miles then turning off hierarchy and placing a cutoff of say 50 miles will speed up the processing. Jay Sandhu

‎11-25-2013

Yes, you map the population at your census blocks as "weight" when you load in these as demand locations. The census centroids is not at parameter. By that I meant the demand points feature class. That would be the census block point feature class. These points are usually the "centroids" of the census block polygons. Jay Sandhu

‎11-25-2013

You can use the Location-Allocation with the Maximize Capacitated Coverage where the point's max population served is the capacity and the population at each census block centroids will be demand. You can solve the 29 points and then you will need to take each cluster of centroids assigned to one point and select their polygons and dissolve them. Do note that there is guarantee that you will get a nice contiguous polygon boundary as the optimal assignment is based on centroids point and trying to maximize the population served. http://resources.arcgis.com/en/help/main/10.2/#/Location_allocation_analysis/004700000050000000/ Jay Sandhu

‎11-15-2013

If your points are taking a long time to load then most likely you are missing a spatial index on your line feature class. Is this a shape file based network dataset? In any case, you should use catalog to look at the street line feature class and see if it has a spatial index and build one if it does not exist. More on indexes here: http://resources.arcgis.com/en/help/main/10.2/index.html#//001700000060000000 http://resources.arcgis.com/en/help/main/10.2/index.html#//003n0000001q000000 I suggest that you should run Calculate Locations on your origins and destinations and then use these location fields to load the data into the origin destination analysis layer when needed. More info here: http://resources.arcgis.com/en/help/main/10.2/index.html#//004800000006000000 Jay Sandhu

‎11-14-2013

There is no OD service available yet with the ArcGIS online BUT there is a closest facility service which can be used! Load your origins as Incidents and your destinations as Facilities in the The Closest Facility tool and set the number of facilities to find equal to the number of facilities you have loaded. it will use the European data online to solve the return back the route and distance information back. You can read more about using these ready to use services here: http://resources.arcgis.com/en/help/main/10.2/index.html#//0047000001v3000000 You will need an organizational account (or get a trial one) to use these services. You can access these in ArcMap via the catalog, expand the Ready-To-Use Services and pick the Logistics and then Closest Facility. Jay Sandhu

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My Ideas

Latest Contributions by JaySandhu

Re: travel time and distance

Re: Route layer: different results with "same" network datasets

Re: Slowly reading the data

Re: Service Area and Closest Facility report different times

Re: New Network Datasat with ModelBuilder

Re: Begin and End at Same Destination

Re: How to Make Service Areas that Represent Equal Drive Times Between Facilities?

Re: Simple routing with many:many sources

Re: Simple routing with many:many sources

Re: Route problem with many:many sources

Re: Parallel Processing Travel Cost Matrices

Re: Finding the Maximum Area Served (from a point location) Relative to Population

Re: Finding the Maximum Area Served (from a point location) Relative to Population

Re: Origin Destination Matrix with 212.000 origins and 100 destinations

Re: OD cost matrix

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