SCO Pilot Project Efforts to Integrate County PLSS Datasets - Timothy Kennedy

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In 2011, the State Cartographer’s Office announced a new pilot project to develop an updated and more accurate Public Land Survey System digital dataset for the state of Wisconsin. Beginning with a nine-county sample set, our goal was to develop and test methods to aggregate more accurate local survey information, which could serve as a revision and update to the Wisconsin Department of Natural Resources Landnet dataset that was published in the 1990s. As we approach the conclusion of our pilot project, we wish to update the geospatial community as to the results of our pilot project and highlight the significant challenges
we faced and adjustments we made to our data model during the integration of multi-county datasets.

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SCO Pilot Project Efforts to Integrate County PLSS Datasets - Timothy Kennedy

  1. 1. Tim KennedyProgram Specialist
  2. 2. Overview Wisconsin Land Survey Network Pilot Project Project goals and objectives Results to date Realizations Next steps
  3. 3. Wisconsin Land Survey NetworkA Statewide(geospatialdataset)Representationof the PLSS
  4. 4. Goals & Objectives Improved dataset of statewide PLSS data Improved coordinates in participating counties Integration of Landnet where local data unavailable Replicable data model for statewide data integration Broad data access Sustainable
  5. 5. Pilot Project Study Area Varied status of remonumentation Abundance of diverse meander features Non-PLSS areas Data availability
  6. 6. Coordinate Accuracy Number of Landnet section corner points in study area: 6,184 Number of county section corner points in study area: 5,491
  7. 7. Coordinate AccuracyMean distance between Landnet and countycorner points: 8.33 mMaximum distance: 124.95 mMinimum distance: 0.05 m
  8. 8. Expectations vs. Experience Expectation ExperienceAutomated data ingestion Resource intensive County x, y data Limits usefulness Pin cushion effect Very minimal Unique corner point i.d. Resource intensive Automated indexing Many datasets include assignment indexing
  9. 9. Next Steps1. Townships2. Quarter-sections3. Quarter-quarter sections4. Half-quarter sections?5. Half quarter-quarter sections?6. Primary display point determination7. Lines8. Polygons
  10. 10. Project ExpecationsPhase I – Pilot study using nine counties – Solicit partners and support – Finalize data model and data integration procedures – Geodatabase of study counties PLSS dataPhase II – Statewide coverage (non-PLSS areas – long lots, metes & bounds, etc.) – Distribution network (web-mapping application, download)
  11. 11. PLSS Finder http://maps.sco.wisc.edu/PLSSFinder/
  12. 12. Project Team Howard Veregin State Cartographer 608-262-6852 veregin@wisc.edu Brenda Hemstead Data Services Professional 608-263-4371 hemstead@wisc.edu Timothy Kennedy Program Specialist 608-890-3793www.sco.wisc.edu ttkennedy@wisc.edu

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