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9dcb0aed
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Jim Regetz
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#
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# informal concordance analysis of flow accumulation in the 60N boundary
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# region of Canada
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#
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# Jim Regetz
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# NCEAS
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# Created on 17-Jun-2011
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# data directory (local to xander)
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datadir <- "~/media/temp/dem/new/flow"
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# load flow direction rasters produced by terraflow (mfd)
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# Canadian DEM
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fl.can <- raster(file.path(datadir, "flowdir_small.tif"))
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# uncorrected fused srtm/aster
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fl.uncor <- raster(file.path(datadir, "flowdir_smc.tif"))
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# gaussian blended srtm/aster
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fl.bg <- raster(file.path(datadir, "flowdir_smbg.tif"))
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# plot cross-latitude profile of mean direction
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lats <- yFromRow(fl.uncor, 1:nrow(fl.uncor))
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plot(lats, rowMeans(as.matrix(fl.uncor), na.rm=TRUE), type="l", lwd=2)
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lines(lats, rowMeans(as.matrix(fl.bg), na.rm=TRUE), col="red")
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lines(lats, rowMeans(as.matrix(fl.can), na.rm=TRUE), col="blue")
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plot(lats, rowMeans(as.matrix(fl.bg==fl.can), na.rm=TRUE), col="red")
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