New answers tagged network-analyst
I had this same problem and worked with a tech person at ESRI. Network Analyst does snap the points to the road network. I ran into this problem because some of my points are on mountain tops where there are no traversable roads. The ESRI tech suggested I increase the search radius for the Incident points from the default of 5000m to 8000m for snapping to ...
try using the 64 bit background processing http://resources.arcgis.com/EN/HELP/MAIN/10.2/index.html#//002100000040000000 Otherwise chunk the data.
No, it cannot. You would have to run the solver and then do some table manipulation on the result. The result should be giving you at least three columns - origin FID, destination FID, and distance. You would need to sort/select everything by origin FID and export each unique origin FID to a new table. Once you have your n tables, you'd use something like ...
If you need to use the road distance as the cost of travel, then you would indeed need to use Network Analyst if you are using ArcGIS and want to take advantage of the restrictions imposed on the roads in the network dataset (one-way, turns, etc.). The solver you would need for this is OD Cost Matrix. You basically need to generate a matrix where each point ...
One way directions have to be set up relative to the digitized direction of the line (affecting the From-To or To-From edge), and cannot detect line orientations relative to a compass or clock face direction. Therefore, I use a domain based on digitized direction, not compass directions. Open in both directions Open in From-To direction Open in To-From ...
Never mind, I figured it out. I just needed to get the resulting layer and add it. result = arcpy.na.MakeODCostMatrixLayer(network, "OD Cost Matrix", "DriveTime") layerObj = result.getOutput(0) arcpy.mapping.AddLayer(dataFrame, layerObj, "BOTTOM")
You can download World Bank data and create vector layers through the QGIS plugin https://plugins.qgis.org/plugins/geobricks_qgis_plugin_world_bank/. I hope this helps.
ArcGIS Online Network Analysis services are based on road network data (from various vendors such as HERE/TomTom and some others in several countries) and do not include railways. You would need to obtain the data and build your own network dataset.
This is a pretty broad topic and there are quite a few answers but off the top of my head a few of the things that could be done are: Topology - Run topology tools on the network dataset to ensure your topological rules are enfored and to locate any connectivity errors. How are you modeling highway interchanges for example, how are you modeling turns, ...
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