I am not completly new to GIS (was taught ArcGIS at Uni) but I would still consider myself (especially compared to all these experts here) a newbie in QGIS or PostGIS.
I want to display the windspeed of typhoons with the help of buffers along their tracks. I used PostGIS to combine the points of the typhoons to Lines ( like in this post). Anyhow, if I buffer the lines, buffer segments from the same typhoon overlap or leave gaps. And I need to change that (Here is a link to a picture showing my problem)
My idea was to create a single line for each typhoon, buffer the line and then split the buffer with the help of my point layer. I need the information on windspeed broken down to the points rather than just an average for the complete typhoon track.
Is there a way to split polygons with the help of point layers? And if not, a way to somehow interpolate the buffer segments that I have right now to close gaps and cut overlapping parts? Doing this manually is not an option at I have to work with typhoon data from 1945-2013.
EDIT: So... if I buffer the lines in Quantum I kind of"solved" the problem of gaps. So I "just" need to interpolate/cut the overlapping parts at the beginning/end of each segment (see picture: http://postimg.org/image/maca8nrc7/ )