Hi All,
I’m a fairly experienced GIS user, but I’m new to QGIS.
I’m using version 2.2, and I’m trying to convert a point
data layer into a raster data layer using the Rasterize
tool. The point data layer has an integer field with a value
of 1 for all records, and I want to make a raster data layer
which has a value of one for each cell which has at least
one point in it (some cells have more than one point in
them). When I use the Rasterize tool, it creates the raster
data layer fine, but all cells with have points in them
appear to have a value of 0.995968. I’ve tried editing the
gdal code (even making the resulting raster data layer an
integer layer), but I still cannot get it to produce a
raster with a value of 1 rather than just a number very
close to one.
Does anyone have any suggestions of where I might be
going wrong and/or how to solve this issue?
On a related note, is it possible to use the Rasterize
tool to work out the average or total values for all the
points which fall in each grid cell? If so, how (I can’t
find anything in the gdal instructions themselves which
would suggest this is possible, but I might be missing
something). If this isn’t possible to do with the Rasterize
tool, are there other tools in QGIS which can do this?
Thanks for any help anyone can give on this.
All the best,
Colin
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