Latest Contributions by JaySandhu

When you say that it does not run sometimes, do you get an error message or it hangs? What error do you get? You can try to add a distance/time cutoff to cut down on the amount of searching. For example if your demand is spread out over 10 miles and you are allocating 10 facilities, then perhaps a cutoff of 3 or 4 miles should be enough. It basically means a facility will not search beyond that distance for available demand. Jay Sandhu ... View more

You can simply load the points to the Location-Allocation layer multiple times! Make sure to load them with lower demand. For example if you load them five times, then make sure the demand is 5 times less. Or you can start editing the point feature class, copy the points and paste them again as many times as you want. Jay Sandhu ... View more

If you are using ArcMap for your LRS, then your tables for the road characteristics are "event" tables. There is a GP tool that will union event tables. See the link below for more information: Overlay Route Events—Help | ArcGIS Desktop  Jay Sandhu ... View more

If you have the census polygon layer, you can run the Feature To Point GP tool with the Inside option checked. This will create a point feature class layer of the polygon centroids. You can then run the Add Geometry Attributes tool on this point feature class to add the X,Y coordinates as fields to that layer. Then you can add the relate to your table and calculate fields on your table to move your X,Y fields on to it. Now you can run the Make XY Event Layer on your table to create a feature layer from it. You can probably skip the calculate fields step and use the Make XY Event Layer tool directly on the related table. Regards, Jay Sandhu ... View more

In that case, use the internet to search (see my previous post for search hint) for an external algorithm as Network Analyst does not have an all possible paths solver built in.  Jay Sandhu ... View more

From your original post of finding all paths to now finding 10 or 20, it is not clear what you need to achieve. Perhaps if you specify what is your end goal then someone could think of a more appropriate methodology. Jay Sandhu ... View more

Can you use the Service Area solver with the lines option to return back everything that is connected/reachable from  the start node? Will that give you the information that you are trying to find all possible paths? Or you can search the net for something like "print all paths from a given source to destination" for a possible solution. But as caution, and I am sure you are aware of this, finding all possible paths can return a lot of paths as the network size increases and may not be tractable.   Jay Sandhu ... View more

Are you planning to use the online services to do this or using desktop software? There are limits to how many incidents/facilities you can send with one request to ArcGIS online. Desktop does not have these limits. Also if you only want to know the distance and not the shape of the actual route that was taken then I suggest you use the Origin Destination Cost Matrix solver. It runs faster. So with the OD solver, you will have two origins and 50k destinations. Specify some cutoffs if it makes sense, like do not bother computing of the distance from origin to the destination is more than 30 minutes, etc. The solve will be quick and you will get a table with the distance values that you can further analyze for your needs. Jay Sandhu ... View more

There are elevation related services available on ArcGIS.com  Here is a link to one that may be of use to you: https://www.arcgis.com/home/item.html?id=05e807869f6f4141893bb7de56d7135c  https://elevation.arcgis.com/arcgis/rest/services/Tools/Elevation/GPServer/SummarizeElevation  Jay Sandhu ... View more

Posting the same reply I posted in the network analyst forum: Network Analyst works with network datasets that model the connectivity and attributes of the road networks. The type of attributes that Network Analyst works with are "costs" that can be minimized for finding a shortest path. Network dataset's can model historic "costs". Generally this is the free flow travel time on an edge as well as the slow down based on a time profile. So the historical traffic is about the change in the travel time NOT the volume of cars going by which is what ADT models. The live traffic maps that you see are based on slow downs on various roads. The traffic volume can be one way to infer the slow downs but that is not the goal of network analyst. It consumes traffic slow downs for travel costs per road segment. You can read more on this topic here: What is traffic data?—Help | ArcGIS Desktop    BTW, it was not clear from your post what you wanted to achieve with traffic volumes data.   Jay Sandhu ... View more

Network Analyst works with network datasets that model the connectivity and attributes of the road networks. The type of attributes that Network Analyst works with are "costs" that can be minimized for finding a shortest path. Network dataset's can model historic "costs". Generally this is the free flow travel time on an edge as well as the slow down based on a time profile. So the historical traffic is about the change in the travel time NOT the volume of cars going by which is what ADT models. The live traffic maps that you see are based on slow downs on various roads. The traffic volume can be one way to infer the slow downs but that is not the goal of network analyst. It consumes traffic slow downs for travel costs per road segment. You can read more on this topic here: What is traffic data?—Help | ArcGIS Desktop  BTW, it was not clear from your post what you wanted to achieve with traffic volumes data. Jay Sandhu ... View more

Faud, I am no longer sure what is the problem you are trying to solve.  In the end you say "this way is not convenient". Is that the problem? I think what you need to state is what is that you are trying to do. For example, what role do the check points play? If they are not on the network and you have to manually snap/split the lines, etc., SHOULD they even have been made part of the network dataset? Could they have been loaded into a route analysis layer as barriers? So not sure what you need help on. Jay Sandhu ... View more

Faud, From your second screen shot showing the Analysis Setting, you are using Minutes as the Impedance attribute. SO in that case, you have to be using Attr_Minutes for the delay. Each impedance attribute that is in the network dataset has a corresponding Attr_<impedance_name>. Only one will be used. So if you are solving on minimizing "Minutes", then make sure to have the delay values in the Attr_Minutes and load that when you load the locations. You can accumulate any or all of the impedance attributes, but only the one you solved on will have the additional delays accumulated as they were taken into account when solving. I hope that this will clear up the issue you are having. Let me know. Jay Sandhu ... View more