14
votes
Check/Uncheck Trim Polygon option in Network Analyst
The purpose of that box is to control how far generated polygons will extend beyond the outside edges of the network.
Consider a dense grid of streets as in a city. Service areas for facilities near ...
- 15.5k
11
votes
Accepted
Formatting street network data for ArcGIS Network Analyst?
Since you are on ArcGIS, here it goes..
Skills:
I suggest starting with learning basics of Network Analyst (further NA). It is impossible to get started preparing the data for network analysis ...
- 29.4k
10
votes
Accepted
Using dot notation vs underscores when calling ArcPy functions?
Both are just different names for the same thing. You can see this by using the is operator:
arcpy.na.CopyTraversedSourceFeatures is arcpy.CopyTraversedSourceFeatures_na
will return:
True
Which ...
- 1,692
7
votes
Calculating chopper rescue time with network analysis
Network Analyst uses a network of roads, because straight-line distance does not accurately represent the roads that a fire truck must drive on. This is especially true if there are geographic ...
- 8,916
6
votes
Accepted
ArcGIS 10.1 Network Analyst shortest route starting from one specific point
You should use the Reorder Stops To Find Optimal Route option.
By default, a route traverses stops in the order you define. However,
you can possibly shorten the route further by letting Network ...
- 29.4k
6
votes
Accepted
Solve for alternate routes without barriers or additional stops in ArcGIS Network Analyst?
As far as I know it's not possible to solve for alternate routes without some additional input or change to the analysis. In a network, given a particular impedance, there is only one shortest route ...
- 15.5k
6
votes
Accepted
Building Large Network Datasets from OpenStreetMap in ArcGIS?
As an answer to both Uffe Kousgaard comments about "what the 18GB file contains" compared to a routable shapefile, and a possible answer to this question:
You don't explicitly state it, but I guess ...
- 2,502
5
votes
How to populate fields for line segment with value from polygon to left and right of it?
You could try the Identity tool, using your line features as the input, and polygons as the identity features:
"When the Input Features are lines and the Identity Features are polygons, and the Keep ...
- 851
5
votes
Accepted
Where should I create my network dataset in ArcGIS?
A network dataset must reside within a feature dataset. A feature dataset can be created in either a file geodatabase (folder.gdb) or a personal geodatabase (filename.mdb). You can't create one in a ...
- 15.5k
5
votes
Emergency Dept. Distance OSM roads Network Analyst
The ArcGIS network analyst extension needs a properly prepared network dataset (graph) for routing. Ordinary OpenStreetMap data sets are not routable because they are simple linestrings. Take a look ...
- 1,868
5
votes
Creating network datasets from OSM data in QGIS?
QGIS cannot convert OSM data into a routable graph.
There are other tools which specialize on this task:
osm2pgrouting open source
osm2po free but not open source
Both convert OSM data into a ...
- 82k
5
votes
How to find and delete all road unattached road segments
For QGIS, you could try the steps below. I used QGIS 2.12.3-Lyon and have a "road" line shapefile, the isolated road in the red circle is what we're trying to remove.
Intersect your layer on itself (...
- 72.4k
5
votes
Service Area (ArcGIS), including slope as a cost
In Network Analyst (NA), there is a concept of cost associated with traversing (that is, going through) a road link (edge). Such cost is calculated based on the direction in which a road link was ...
- 29.4k
5
votes
Accepted
Determining optimum shared school bus route to a single destination from multiple origin points
This looks like a Steiner tree problem. You'll need some programming to solve it.
Picture below shows manually improved output of algorithm from networkX:
and I think computing "flow" in this network ...
- 21.6k
4
votes
How are service areas created in ArcGIS Network Analyst?
At the bottom of the help page on service area analysis that PolyGeo links to, there is a link to another help page: Algorithms used by the ArcGIS Network Analyst extension. From that help page:
...
- 15.5k
4
votes
Network Analyst: Location Allocation for Model Builder
In your original image you had an unused Service Area Layer tool which is a potential cause of error 735. If you still get 735 after removing that, it would indicate an unexposed, required parameter ...
- 15.5k
4
votes
Accepted
Retrieving points that make up drive-time polygon generated by ArcGIS for Desktop in automated way?
Network Analyst is an ArcGIS extension which can be accessed either through a Desktop application such ArcMap (for manual GIS routing analysis) or as a web service when exposed as an ArcGIS Server ...
- 29.4k
4
votes
Minimizing turns in ArcGIS Network Analyst routing?
One possibility would be to use a turns feature class or table to model an increased time impedance for all turns.
The idea would be to use a high value for turns (such as 15-20) seconds, and a low ...
- 2,781
4
votes
Accepted
Visualizing road Intersections & connections in ArcGIS
I would suggest two approaches:
1. You use Network Analyst to build a network dataset (ND) from your raw street feature class. Choosing the "Any Vertex" connectivity would create a junction ...
- 29.4k
4
votes
Creating network datasets from OSM data in QGIS?
Assuming you have ArcMap and a Network Analyst extension (as mentioned in your question) it is possible to use OSM data for routing without using qgis. The most important is that you need to generate ...
- 1,868
4
votes
Accepted
Network Dataset with one-way streets, ArcGIS 10.3
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 ...
- 8,455
4
votes
Accepted
Network Analyst breaking ModelBuilder?
The Solve tool has a 'Terminate on solve error' parameter that is checked by default and will stop the script if you encounter an error. Unchecking it will let the script go on if the current analysis ...
- 9,567
4
votes
Accepted
I don't want to use the time_of_day parameter in MakeServiceAreaAnalysisLayer, what do I put to miss it?
If you do not wish to enter a value for a parameter, you'd typically pass it an empty string. The time_of_day parameter is the 6th parameter (or so I read from the doc).
arcpy.na....
- 15.2k
4
votes
Accepted
OD Cost Matrix does not work from every origin to every destination?
I think it is a network problem.
When that happens to me it's usually due to the restrictions settings not allowing a path from an origin to any destination. As a diagnostic tool, try running 1 ...
- 837
4
votes
Solve Esri Toolbox produces empty Shapefiles (make route layer)
Your question is a bit unclear. But the expression will not work when you name the variables Punkt_6, then use them like this "NAME = 'Punkt_6'". 'Punkt_6' with the quotes is just a string and not the ...
- 52.1k
4
votes
Viewing Python code for ArcGIS tool MakeVehicleRoutingProblemLayer
No it is not possible. The Make Vehicle Routing Problem Layer tool is not a python script tool, it is a proprietary closed source binary/compiled tool.
You can see at a glance what sort a tool is from ...
- 52.6k
3
votes
Creating shortest route using line-segment layer as network locations?
You cannot use lines as stop inputs for a network analysis. The only way you could possibly use the lines is to set them as barriers but give them a negative value (ie, rather than adding time, they ...
- 15.5k
3
votes
How to populate fields for line segment with value from polygon to left and right of it?
Without an Advanced level license of ArcGIS for Desktop your best alternative may be to use ArcPy and Geometry objects.
Upon seeing the Comment from @Michael Miles-Stimson I looked in the ArcGIS 10.2 ...
- 63.8k
3
votes
How do you remove isolated roads from a bigger network?
I was looking for a possibility to delete isolated lines from OSM data, too. Unfortunately, I have a huge amount of data. And having to deal with Network Datasets anyway, I just didnt want to examine ...
- 31
3
votes
Optimizing arcpy script to batch generate OD cost matrix in road networks
I have a similar problem but because my process is iterative, I can have it easier by reusing the path and updating the feature every iteration. I also coded the program to be a standalone python ...
- 31
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