I'm working with QGIS 2.6
I have a points layer representing different bus and train stops. I applied a categorized symbology; each colour represents a class of value (field regarding time access from a starting point).
I would like represents this time information as different polygons, because in a 2nd time I have to intersect this information with another point layer.
Could you throw a light on this for me? Rasterize this data would be a interesting way? I tried vector -> convex envelope, but the result is not what I am looking for. The spatial distribution of points seems to be too complex to convert the points cover toward convex envelope.
I paste below a SS of my current point data: