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Quality controlling your data
RivEX requires your river network to be topologically correct for it to successfully process. Various errors can occur when a network is created and/or updated.
RivEX provides a set of quality controls which you can run on your network. The output of a quality control is a dBase or text file identifying the polylines which failed the quality control. It is then up to you, the user, to correct your data.
RivEX provides a set of quality controls which you can run on your network. The output of a quality control is a dBase or text file identifying the polylines which failed the quality control. It is then up to you, the user, to correct your data.
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Polyline attributes
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Zero (null) length polylines
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Multi-part polylines
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Self-intersecting polylines
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Closed polylines
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Small polylines composed of two vertices
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Disconnected polylines
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Double digitised polylines
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Intersecting polylines
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Overlapping polylines
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Duplicate geometry
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Sources within a network
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Monotonic trend
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Network cycles
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Polyline spikes
RivEX also provides a tool for automatically removing self-intersections
about dealing with these errors: