Hi all, I have a large river network dataset (lines). Now I'd to assign unique categories to each group of connected lines that have an attribute in common.
For example, my rivers are categorized based on some kind of stream order. I want to group all rivers that belong to stream order 2 and are spatially connected; each group should get a unique category value. I thought that I could first extract all rivers with a particular attribute (e.g. stream order = 2) which will provide me some scattered pattern of lines. Then I need a spatial join tool to make subgroups of lines that are connected. How can I achieve the latter? Any idea? Cheers, Johannes
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