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Improving workflow at CNDDB

Annie Chang. Improving workflow at CNDDB. California Natural Diversity Database. Natural heritage program Map rare plants and animals http://www.dfg.ca.gov/biogeodata/cnddb/. Work is time-consuming. Purpose. Automate part of the workflow using python script. Select by attributes.

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Improving workflow at CNDDB

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  1. Annie Chang Improving workflow at CNDDB

  2. California Natural Diversity Database • Natural heritage program • Map rare plants and animals • http://www.dfg.ca.gov/biogeodata/cnddb/

  3. Work is time-consuming

  4. Purpose • Automate part of the workflow using python script

  5. Select by attributes • Needed to select new records that are not yet buffered (Source_Feature = N)

  6. Buffer selected records

  7. Append • Each time the script runs, the buffer feature class would be deleted and recreated • Save the results of the buffer in the feature class SOURCE_FEATURE through append

  8. Calculate Field • Needed to mark the records as processed • Values of Source_Feature were changed from “N” to “Y”

  9. Dissolve • Occurrences are summaries of detection areas for particular species

  10. Obstacles • When to put single, double, or no quotes around variables • Text values for the CalculateField operation needed double quotes

  11. Obstacles (continued) • Originally, the buffer was done on the entire source layer. Then, I realized if I were to add additional records to the source layer (like when we receive new data at CNDDB), there is no way to only buffer the new data. I added a new field “Source_Feature” that had values “Y” or “N” to indicate whether this record has already been buffered and saved in the SOURCE_FEATURE feature class.

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