New answers tagged network
In order to get started with Network Analyst extension (which you will need to use a network dataset) and build your own network dataset from these data, please consider going through this tutorial (the best one I recommend all who just start working networks). It is not updated to the current version of ArcGIS, but is by far the best practical guide for ...
you could possibly use thessien polygons to deliniate barriers and execute a one mile buffer around those and use the dissolve tool to create a service area of your buffers.
This doesn't actually answer the question but it still solved my problem: What I did was "simply" to snap my points (hospitals) to the road network within PostGIS beforehand. Now that all my points lie exactly on the network, I no longer need to worry about the tolerance. This is not very elegant though, so if anyone has a "real" solution, I would still be ...
If your a student, you can access the OS's ITN which will give you the best results. If not this dataset is very expensive and I'd use the OSM version.
You can download the data from open street map .Use the Export button on top left option to download data. Additionally if you are looking for an routing/ networking algorithm you can have a look at project OSRM which uses the above mentioned data for routing. hope it helps. good luck .
We you say United Kingdom this is England, Wales, Scotland and Northern Ireland The Data from Ordnance Survey for Great Britain this is England, Wales and Scotland For Free Sources Mid Scale 1:30,000-50,000 Meridian2 vector data https://www.ordnancesurvey.co.uk/opendatadownload/products.html 1:10,000 (could be used a 1:5,000 as vector data) For the most ...
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