Latest Contributions by JaySandhu

Do you know approximately how many of the 66000 locations are within the 750 meter cutoff from any of the 53 polling locations? if there are a lot, perhaps you can reduce the cutoff to say 100 meters and try solving again. I do not know the extent of your data, so you could try a different, more reasonable cutoff. Jay Sandhu ... View more

You mention that you have 66000 voters and 53 polling stations. Are these the number of demand locations and candidate facilities loaded into the Location-Allocation layer? Or do you have larger set of candidate locations from which you are choosing to locate 53? You also have a cutoff of 750 meters and a capacity of 1200. Does each of the 66000 voter locations have 1 demand value? That is, in total there are 66,000 voters. So with 1200 capacity, you need at a minimum of 55 voting locations to satisfy everyone. In general the speed of the Location-Allocation depends on how many candidates it has AND how many demand locations are within the cutoff. The bigger this number, longer it takes to solve. So please give some more details as asked above. Jay Sandhu ... View more

You can add two fields, FT_WalkingMinutes and TF_WalkingMinutes and compute the travel time for each road based on up hill and down hill slope for that street segment. You can use Tobler's hiking formula to compute these values based on the slope. For more information, see: Tobler's hiking function - Wikipedia Jay Sandhu ... View more

When you create the feature dataset, make sure it has the same spatial coordinate system as the feature class you will place in it. You can import the coordinate system from the feature class itself. Jay Sandhu ... View more

A network dataset is created inside a Feature Dataset of a geodatabase. So make sure the feature class that you have in the geodatabase is placed inside a feature dataset. Jay Sandhu ... View more

Yes it is possible and quite easy to do as long as you have a common ID between the two feature classes to indicate which point goes to which point. If they are in the same order then the feature ID should work. Are you using ArcGIS Pro? If yes, create a Route analysis layer (not Closest Facility). Load your house feature class AND make sure to map the ROUTENAME property to common ID. Then load the work feature class and set the same ROUTENAME property to the common ID from the work feature class. Now solve the route layer. You will get one route per common ID. So if you loaded ten pairs of home/work points, you will get ten output routes. You can read more about the ROUTENAME here: Route analysis layer—ArcGIS Pro | Documentation Jay Sandhu ... View more

The Location-Allocation capabilities of Network Analyst helps you pick dispatch locations (warehouses, etc.), to service a set of demand locations. So you should be able to use that for your use case. You can read more about it here: Location-allocation analysis layer—ArcGIS Pro | Documentation You can try out the Tutorials here: Network Analyst tutorials—ArcGIS Pro | Documentation You will have to think about how you will use your data like boundaries and turn them into inputs for this solver. Let me know if you want to discuss this more once you have had a chance to read up on it. Jay Sandhu ... View more

Network analyst works on one impedance attribute at a time. So the distance decay will apply to whatever cost is returned from the network edges. You can have a network built with different modes like road, and rail and have a way to return the appropriate cost of transferring from one mode to another. The solver cannot work on minimizing two different impedances at the same time.  Location-Allocation does not model any extra fixed costs for facilities. For the gravity model based models, Maximize Market Share and Target Market share, if competitor facilities are present then your candidate facilities can have a weight associated with them. Higher weight means the facility is more attractive. e.g., stores with larger area can be modeled this way. Perhaps you can describe exactly what you are trying to model and solve and maybe I can suggest some methodology. Regards, Jay Sandhu ... View more

if you only have ONE facility or if all the facilities are more than 100 miles away then you can use scaled cost barriers. That is, generate a service area with breaks at 50 and 100 miles. Assume that the cost if $1 per mile for the network. Then you can load the service area polygons as polygon barriers and set to be scaled cost and not restrictions. Scale the outer polygon (50 to 100) as .75 and the inner polygon (0 to 50) as .5 Now all the edges within 50 miles will have a cost of $.5, to 100 miles will be $.75 Note this only works if the polygon barriers do not overlap as they are addative. Also, you could model the distance decay functions to increase cost further your drive.  But these are continuous, i.e. linear or power or exponential decay functions and not step functions. Jay Sandhu ... View more

You can add restrictions for roads that pedestrian's should not travel along. You do not need to delete these roads. You can also add "Avoid" restrictions on roads where people should not walk if that is the only way to get somewhere. That way those roads are not taken unless that is the only way. You can use travel modes to set up a walking travel mode where you choose the walking impedance attribute and the restrictions to use. Similarly you can set up a driving travel mode.  I will suggest that you take a look at the tutorial network datasets to see how some of these things are setup.  Network Analyst ArcGIS Pro Tutorial Data Jay Sandhu ... View more

If you are able to edit your street data and re-build the network dataset, then you can add a new travel time fields, calculate the new travel time values according to your needs, add a new impedance attribute to your network dataset from these fields and rebuild the network. Now use the new impedance attribute in your analysis.  If you are unable to edit, another approach can be to use barrier polygons with scaled cost, not restriction values in the service area layer. You can create a polygon over your study area and set the scaled cost to 0.9  and all the streets that fall in that barrier polygon will have their travel times reduced by 10% and thus your vehicle can go further. You can adjust the cost to 0.85, etc. as needed for your analysis. The only issue might be that if you have a lot of streets that fall inside the barrier polygon then it can be slow to load the polygon during analysis. Jay Sandhu ... View more

Hard to tell why you got that message if the build log says the network was built. Have you tried the build again? If the error persists then perhaps contact the Esri technical support as suggested!  Jay Sandhu ... View more