Transforming shapefile into raster file in QGIS? [duplicate]

Question

I'd like to transform a shapefile into raster file in QGIS and the opposite way back also (raster to shapefile).

Can you help me?

Answer 1

For Shapefile to raster see How to convert a vector layer to raster?.

You're looking for "Rasterize" and "Polygonize" tools in Raster menu (gdal plugin).