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Ensuring Measures for Geodatabase Reaches: NHD MValue Utility

Learn how to ensure all reaches in your geodatabase have measures using the NHD MValue utility provided by the NHD Stewardship Team. Validate data with this QC tool and flag errors for resolution. Discover the importance of measures in your dataset and their utility.

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Ensuring Measures for Geodatabase Reaches: NHD MValue Utility

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  1. Measures (MValues)

  2. If I extract data from the Geodatabase, will the reaches already have measures? Answer; Yes, but this is not a guarantee that all reaches will have measures

  3. How do I insure that all my reaches have measures? Answer; Use the MValue utility provided by the NHD Stewardship Team of course

  4. Programs NHDGeodatabase NHDMValueUtility

  5. 1.) Select Output Log File: Navigate to folder that contains pgdb (Pgdb will not be displayed) Name output file same as pgdb

  6. 2.) Select a Flowline Feature Class: Navigate to pgdb – select Flowline feature class OK

  7. The MValue utility is a valuable QC tool Measures that cannot be calculated are flagged as errors and can be resolved Error Log generated from NHDMValue Utility

  8. Example: MValue utility identifies reach with opposing flow

  9. OK, Now that I have insured all reaches in my dataset have measures What are they used for?

  10. First you will need your measuring tool…………

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