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Ingrid:
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HTMLwords
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Features Hydrological Rivers MajorRivers[geom_id
system
the_geom
r_name
]
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grid: /gid (unitless) ordered (-0.5) to (97.5) by 1.0 N= 99 pts :grid
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$partialdiff sub gid$ $integral dgid$ [ Features Hydrological Rivers MajorRivers system ] [ | gid]
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