When I request a radius buffer in QGIS (Dufor). my buffer comes out as a 20-sided polygon rather than a true "circle". This has lead to some missed blocks when clipping underlying vector layers for population density analyses (e.g., they would be within a circle, but this 20-sided polygon's straight sides preclude fringe blocks from being included in the radius).
is there a way I can go into the radius buffer command lines and either increase the number if sides to make the area more circular, or make it truly a "radius" buffer?
Answer
The "segments to approximate" option is what you are looking for. So the number you put into that filed will be the number of sides/quarter. So the default is 5, so you end up with a 20 sided polygon. Put in 25, and you end up with a 100 sided on, so it becomes smoother.
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