I want to have road-network information of different cities(New York for example) in the format of line segments(i.e. every road is represented by segment(s)). I want this for experimental purposes in my college project. I have looked into using QGIS however I am unable to get what I want as I am totally new to the platform. To be precise the question is as follows:
Input : A city name
Output : File containing a list of segments which together approximates the road network of the input city.
I have installed the openlayers plugin in qgis, but as I am totally new I don't know how to use it and where to start. Any pointers will be appreciated.
So far I was able to get upto a road network in QGIS. This was done as follows(e.g. for a city in India):
Downloaded India Shapefile from gadm.org
Extracted the city I wanted into a new shapefile(Select city from attribute table, and do a vector clip)
Got road shapefile for India from http://download.geofabrik.de/asia/india.html and again did a Geometric intersect with the shapefile obtained in step 2. Saved this as a new shapefile.
Now there is only one hurdle remaining. I have a road network for a city in my hands as a shapefile. How do I convert the road network into co-ordinates for line segments which approximate the network(i.e. each straight segment in the shapefile is represented by two co-ordinates, I want all these co-ordinates). Any pointers on this would be really helpful.