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2008 Jan 28
0
LOOPS - GIS
Dear R-user community, I need to solve a problem related to river management. The task is to calculate the distance from specified points in a river to the outlet of the river. The river is defined by a database (here called "M"): LinkID |NodeID1 | NodeID2 |Distout |Length ---------------------------------------------------------------------------- 10 |100 |200 |10 | 80 80 |200 |180 |30 | 40 15 |180 |400 |50 | 10 50 |400 |170...