Hydrological code: Difference between revisions

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Subsequently every watershed along this coast is assigned a number using the Pfafstetter System. This implies that the four largest watersheds are selected and receive numbers 2,4,6, or 8. The watersheds in between the large systems receive numbers 3, 5, and 7. Numbers 1 and 9 are used for the small watersheds on the edges of the strait. The smaller systems can subsequently be numbered recursively or kept together for grouping purpose.
Landmasses (Continent and Islands) are also numbered in a logical manner, along a clock-wise oriented sea. For Europe containing many inner seas this featuresfeature helps to read the relative ___location of a hydrological object in the sea.
 
==United States==