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2
votes
1answer
35 views

Preserving origin IDs when creating Origin-Destination (OD) Cost Matrix?

I have created an Origin-Destination cost matrix showing the distance in feet between several thousand home addresses (origins) and about 24 rental vehicles (destinations) at various points throughout ...
0
votes
0answers
42 views

Network Analyst Loading Origins/Destinations and wait times

I'm having a difficult understanding the loading times when loading origins/destinations into Network Analyst. I have many network datasets that all vary slightly. They were created in batches so the ...
0
votes
2answers
161 views

arcgis 10.0 od matrix only solves A-A, B-B, C-C, not A-B, A-C, etc

I think I have a very noob question here. Using ArcGIS 10.0 and Network Analyst extension to create Origin-Destination Matrix. I have a shapefile of 120 points, and I want to create a matrix of ...
2
votes
0answers
106 views

Network Analyst - OD Cost Matrix snapping distance

I am using the ArcGIS Network Analysis - OD Cost Matrix layer tool and I was wondering if anyone knew of a way to incorporate the snapping distance of the origin and destination to my total distance ...
10
votes
1answer
1k views

How to create desire lines in QGIS?

How can I show the flow coming from an Origin-Destination matrix as desire lines? I need a result like the one in the picture below. I need to scale them proportionally to its value (coming from a ...
1
vote
1answer
374 views

Flow mapping visualization using a road layer

I am trying to illustrate travel using a flow map on a road layer. My data is: city of origin destination number of travelers I would like to use a polygon city layer (or point) and a road layer, ...
5
votes
2answers
343 views

R packages for deriving spatial clusters from origin-destination matrix

I have a matrix of origin-destination flows and I am trying to figure out the best way to derive X number of functional spatial clusters from the data. I haven't done this particular type of analysis ...
7
votes
1answer
957 views

Making radial flow map showing curved lines over short distances (20km) using ArcGIS for Desktop?

Esri have provided instructions on how to make a radial flow map but I think the curved lines will only be produced over a long distance, like half the globe. For short distances (20km) a geodetic ...
11
votes
5answers
3k views

How can I map a matrix of origins and destinations in QGIS?

I have a central point on a map, and I have other points in a separate layer (the location of a venue, and the origin cities of the venue visitors). Is there a plugin which would generate output ...
3
votes
1answer
2k views

How to curve lines between points on a map?

I'm trying to curve the lines between points on a RaphaelJS map like Tata Communications - but how did they do it? What sort of mathematics lie behind these curves - unless ofcourse they're all ...
2
votes
1answer
115 views

Display freight volume by city on a geographic map

I have been requested to show on a geographic map the volume (in meters cubed m3) of freight (parts) that ship to various cities (Canada/USA). The idea is to show which cities receive the most freight ...
27
votes
4answers
3k views

Curved point-to-point “route maps”

I have recently been looking at airlines web pages that display their routes departing a certain city to all other cities they service. I would like to be able to create similar curved routes between ...
5
votes
3answers
1k views

How to create spider diagrams (hub lines) in PostGIS?

I'm rather new to PostGIS but I have done a lot of reading. One thing that I have been searching for is a function that allows users to create a "spider diagram" (also called "desire lines" or "hub ...
13
votes
6answers
1k views

What is the best method of visualizing a network on a map?

I have several hundred geo-referenced data points, and the relationships from that point, to other points. I'm trying to figure out the best way of visualizing this on an interactive map (possibly ...