Latest Contributions by JaySandhu

with 45 minute service area around 50 to 60 facilities you are most likely running out of memory. I would suggest that you either reduce the number of facilities OR use "chunking", that is solving the problem in chunks by setting a registry key to instruct the software to do this. You can get the details on how to enable this by the following article: http://resources.arcgis.com/content/kbase?fa=articleShow&d=30760 Regards, Jay Sandhu ... View more

How many faciliies do you have in your service area layer? I am wondering if it is running out of memory. Jay Sandhu ... View more

Hi, while creating drivetime polygons, the Network Analyst gave me the error above. What does this mean? Thanks. This error message is masking the real problem. Most likely the service area failed due to some reason such as being too large or no edges traversed. What are your break values and what are the settings for the polygon generation. Perhaps you can turn on the Line Generation as see if any edges are getting traversed and then try to figure out why the service area failed. Jay Sandhu ... View more

Thank you so much for your help, Jay and Deelesh! I have another question though. I am using OD Cost Matrix for my task and I find out once you load your locations into either origins and destinations, they are assigned new attributes, which have nothing in common with the original points. I am just wondering is there any way I can keep some if not all attributes from the original point layer. I know on the map, they are two separated layers, I am thinking I could use spatial join, but I am afraid it would not help much. When you do a Load Locations, you have the option to map in some fields such as NAME. So you could map in a field to NAME and later use that to do a JOIN. However another thing you can do is after you create the OD Cost Matrix layer, open the attribute table of the Origins (or destinations) and Add Fields that you want to bring over from the original point layer. Now when you do a Load Locations, you will see your new fields listed on the analysis proprties and now you can map in these fields from the original point layer and load them as part of loading the point locations. Regards, Jay Sandhu ... View more

Your network seems ok. Though it is not clear what is "intersection". Is it a attribute that you added to the network? Perhaps you can use the "network identify tool", second icon from right on the network analyst toolbar to identify the edges and junctions. Also it is not clear what is "What I eventually want to produce" table. Can you describe what you want? Jay Sandhu ... View more

5000 may be too many points to route at one go. But 1000 should have worked. Perhaps you can give some more information about the machine/memory available and more information on the settings of the VRP layer settings such as how many routes are set, etc. Jay Sandhu ... View more

>I am curious if I can create a network dataset without any street data. Say, I have 4 points and I have >their lat/long, all I want is the 6 straight lines between these 4 points. Technically you can create network dataset with no street data, just points. However it will be unuseable as it will only have some disconnected points. It is not going to generate any lines between them. Also I am not sure how you would get 6 lines between 4 points. >Also, is there a way I can convert point to polyline? I am not sure how you can convert a point to a polyline, unless you want to create lines between sets of points. In that case, take a look at the following script and modify as needed: http://resources.arcgis.com/content/kbase?fa=articleShow&d=31879 Regards, Jay Sandhu ... View more

If you have a set of point locations that you want to compute the OD distances/travel times and you are not interested in the shape of the shortest paths, then use the OD Cost Matrix solver. For this you need a network dataset that has a time attribute. If you do not have street data then I can suggest that you install the free streetmap data that comes ont the Data and Maps DVD and use that. Once you have the data installed, start ArcMap, add the street network to ArcMap, add you origin/destination point feature class to ArcMap (if it is simply a table of Lat/Long's, then you can use the Add Data from XY capabilities to turn that into feature class), create a new OD Cost Matrix layer, load the points as origins and destinations and solve. Regards, Jay Sandhu ... View more

Jim, You can use the free nationwide streetmap data that comes on the Data and Maps DVD with ArcGIS. It has then network dataset already built with travel time attributes. It will be better than the TIGER data that you can get. Regards, Jay Sandhu ... View more

>I have created and built my street network through Network Analyst and was wondering if anybody new how to > create a feature class that would contain the point along with the streets that would intersect the point attribute > values in the table. Can you be more specific by what you mean by "contains the point along the streets that would intersect the point attribute value in the table"? When you build the network dataset, it makes the junction feature class where all the lines intersect and it will be in the same feature dataset where the network has been created. If you need these intersection points, they are already created. Jay Sandhu ... View more

Do you have the extension turned on in ArcMap when you are unable to run the Make Closest Facility Layer?  By default when you install ArcGIS, the extensions are turned off and your model will not validate as it should say that the tools are not licensed. Regards, Jay Sandhu ... View more

I tried the same steps using the tutorial data and did not get a crash. Can you provide some more details on the data source, etc. Did the crash generate a crash dump? If yes, can you send a copy? Does it always crash when you repeate these steps? If you have a reproducible case, can you send that mxd/data? Regards, Jay Sandhu ... View more

In 9.4 the Network Analyst has been updated with a number of new features and numerous enhancements. The new features are: A new Location-Allocation solver for site selection including support for gravity (Huff) models Enhanced barrier support for using line and polygon barriers Lot of enhancements to the Network Dataset such as: Incremental Rebuild based on dirty areas 3-D Network connectivity Versioned network datasets in SDE Historical traffic Data Dissolve network tool for networks in a geodatabase with support for hyper edges to enable high-performance routing Better storage of network elements on disk in the network dataset to support faster routing performance Numerous other improvements such as in loading locations, better no u-turn support, driving directions, geoprocessing, scalability, SDK, Tutorials and documentation. Jay Sandhu ... View more

Thanks for setting up the transportation forum. Jay Sandhu ... View more