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# GRASS commands -- testing some stuff for flow direction
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#
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# Jim Regetz
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# NCEAS
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# Created 15-Jun-2011
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export DEMDIR=~/media/temp/terrain/dem
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export FLOWDIR=~/media/temp/terrain/flow
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#
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# Canada near 60N, from 136W to 96WW
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#
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# load sample data for testing flow stuff
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r.in.gdal input=$DEMDIR/cdem_300straddle.tif output=cdem_300straddle
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r.in.gdal input=$DEMDIR/aster_300straddle.tif output=aster_300straddle
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r.in.gdal input=$DEMDIR/srtm_150below.tif output=srtm_150below
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r.in.gdal input=$DEMDIR/fused_300straddle.tif output=fused_300straddle
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r.in.gdal input=$DEMDIR/fused_300straddle_rampexp.tif output=fused_300straddle_rampexp
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r.in.gdal input=$DEMDIR/fused_300straddle_blendgau.tif output=fused_300straddle_blendgau
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# oops -- region is too big for terraflow default of using
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# dimension_type (i.e., short), which means nrows and ncols are both
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# capped at ~30K:
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# ERROR: [nrows=300, ncols=48000] dimension_type overflow -- change
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# dimension_type and recompile
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# so let's restrict it to a smaller lon range for now...
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g.region n=60.125 s=59.875 w=-125 e=-100
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# do flow
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# each took ~1.5 min on xander (22-Jun-2011)
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r.terraflow.short elevation=cdem_300straddle filled=filled_cdem \
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direction=direction_cdem swatershed=swatershed_cdem \
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accumulation=accumulation_cdem tci=tci_cdem
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r.terraflow.short elevation=aster_300straddle filled=filled_aster \
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direction=direction_aster swatershed=swatershed_aster \
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accumulation=accumulation_aster tci=tci_aster
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r.terraflow.short elevation=fused_300straddle filled=filled_fused \
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direction=direction_fused swatershed=swatershed_fused \
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accumulation=accumulation_fused tci=tci_fused
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r.terraflow.short elevation=fused_300straddle_blendgau filled=filled_fused_bg \
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direction=direction_fused_bg swatershed=swatershed_fused_bg \
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accumulation=accumulation_fused_bg tci=tci_fused_bg
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# now with SFD (D8) algorithm
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# each took ~1 min on xander (22-Jun-2011)
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r.terraflow.short -s elevation=cdem_300straddle filled=filled_cdem_sfd \
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direction=direction_cdem_sfd swatershed=swatershed_cdem_sfd \
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accumulation=accumulation_cdem_sfd tci=tci_cdem_sfd
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r.terraflow.short -s elevation=aster_300straddle filled=filled_aster_sfd \
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direction=direction_aster_sfd swatershed=swatershed_aster_sfd \
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accumulation=accumulation_aster_sfd tci=tci_aster_sfd
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r.terraflow.short -s elevation=fused_300straddle filled=filled_fused_sfd \
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direction=direction_fused_sfd swatershed=swatershed_fused_sfd \
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accumulation=accumulation_fused_sfd tci=tci_fused_sfd
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r.terraflow.short -s elevation=fused_300straddle_blendgau filled=filled_fused_bg_sfd \
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direction=direction_fused_bg_sfd swatershed=swatershed_fused_bg_sfd \
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accumulation=accumulation_fused_bg_sfd tci=tci_fused_bg_sfd
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# export flow dir rasters as tif
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r.out.gdal input=direction_cdem output=$FLOWDIR/cdem_300straddle_mfd.tif
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r.out.gdal input=direction_cdem_sfd output=$FLOWDIR/cdem_300straddle_sfd.tif
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r.out.gdal input=direction_aster output=$FLOWDIR/aster_300straddle_mfd.tif
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r.out.gdal input=direction_aster_sfd output=$FLOWDIR/aster_300straddle_sfd.tif
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r.out.gdal input=direction_fused output=$FLOWDIR/fused_300straddle_mfd.tif
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r.out.gdal input=direction_fused_sfd output=$FLOWDIR/fused_300straddle_sfd.tif
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r.out.gdal input=direction_fused_bg output=$FLOWDIR/fused_300straddle_blendgau_mfd.tif
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r.out.gdal input=direction_fused_bg_sfd output=$FLOWDIR/fused_300straddle_blendgau_sfd.tif
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# export flow accum
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r.out.gdal input=accumulation_fused_bg output=$FLOWDIR/fused_300straddle_blendgau_fa.tif
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r.out.gdal input=accumulation_cdem output=$FLOWDIR/cdem_300straddle_fa.tif
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r.out.gdal input=accumulation_aster output=$FLOWDIR/aster_300straddle_fa.tif
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# do the above for SRTM, but only in southern half of region
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g.region n=60 s=59.875 w=-125 e=-100
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r.terraflow.short elevation=srtm_150below filled=filled_srtm \
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direction=direction_srtm swatershed=swatershed_srtm \
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accumulation=accumulation_srtm tci=tci_srtm
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r.terraflow.short -s elevation=srtm_150below filled=filled_srtm_sfd \
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direction=direction_srtm_sfd swatershed=swatershed_srtm_sfd \
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accumulation=accumulation_srtm_sfd tci=tci_srtm_sfd
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r.out.gdal input=direction_srtm output=$FLOWDIR/srtm_150below_mfd.tif
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r.out.gdal input=direction_srtm_sfd output=$FLOWDIR/srtm_150below_sfd.tif
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r.out.gdal input=accumulation_srtm output=$FLOWDIR/srtm_150below_fa.tif
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g.region n=60.125 s=59.875 w=-125 e=-100
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