I feel this is a competition worthy problem, due to its size.
I would like to weight a set of raster pixels to the attributes of a set of polygons. To do this I need to know the proportion of each polygon in each raster pixel.
I'd also like to keep IDs of both the pixel and the polygon on the final output.
Sometimes the polygons are larger than the pixels, sometimes smaller. Pixels with a value of 0 can be excluded.
The polygons I am working with are Statistical Area Level 1 (SA1) ASGS Ed 2011 and they can be found at the bottom of this page:
http://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/1270.0.55.001July 2011?OpenDocument
The raster I am working with is here:
http://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/1270.0.55.0072011?OpenDocument
I believe these are GDA94, aka epsg:4283
As you'll notice these are both large, which is why efficiency is important.
Any open source solution (R, QGIS etc.) would be best, although if there is an efficient solution in ArcGIS or MapInfo it would be interesting to know of it.
أكثر...
I would like to weight a set of raster pixels to the attributes of a set of polygons. To do this I need to know the proportion of each polygon in each raster pixel.
I'd also like to keep IDs of both the pixel and the polygon on the final output.
Sometimes the polygons are larger than the pixels, sometimes smaller. Pixels with a value of 0 can be excluded.
The polygons I am working with are Statistical Area Level 1 (SA1) ASGS Ed 2011 and they can be found at the bottom of this page:
http://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/1270.0.55.001July 2011?OpenDocument
The raster I am working with is here:
http://www.abs.gov.au/AUSSTATS/abs@.nsf/DetailsPage/1270.0.55.0072011?OpenDocument
I believe these are GDA94, aka epsg:4283
As you'll notice these are both large, which is why efficiency is important.
Any open source solution (R, QGIS etc.) would be best, although if there is an efficient solution in ArcGIS or MapInfo it would be interesting to know of it.
أكثر...