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Mission: To provide a uniform system of mapping for Ramsey County. Goal: To establish and maintain a coordinate control

Ramsey County Land Records Mapping Modernization 1984. Mission: To provide a uniform system of mapping for Ramsey County. Goal: To establish and maintain a coordinate controlled base for computerized mapping. Mapping Project Development. Records & Revenue. Public Works.

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Mission: To provide a uniform system of mapping for Ramsey County. Goal: To establish and maintain a coordinate control

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  1. Ramsey County Land Records Mapping Modernization 1984 Mission: To provide a uniform system of mapping for Ramsey County. Goal: To establish and maintain a coordinate controlled base for computerized mapping.

  2. Mapping Project Development Records & Revenue Public Works Information Services

  3. Development Responsibilities Information Services • Computer Hardware • Computer Software System Networking • System Accounting

  4. Development Responsibilities Public Works • Land Surveys (traditional & GPS) • Least Squares Adjustments • PLSS Publications and Maintenance • SGR Control Skeletons • Aerial Photography • Planimetric Features

  5. Development Responsibilities Property Records & Revenue • Editing and Delivery of ½ Section Maps • Ultimap Software Master Level • Property Records Administration

  6. PLAT DOCUMENTS

  7. 1985 Ramsey CountyLand Records Modernization

  8. 1985 Ramsey CountyLand Records Modernization

  9. Ramsey County Surveyor’s Office

  10. Survey Equipment (198X)

  11. Survey Traverse Network

  12. Traverse and Network Adjustments

  13. Ramsey County GPS Survey October 1985

  14. Global Positioning System (GPS) • Used widely in the surveying and construction fields • A major time saver – no line of sight • Limitations include: tree cover, buildings, and data link • Weather does not impact

  15. How it works • Measures distance by the time it takes a signal to get from satellite to the receiver • Use at least 4 satellites (can have as many as 15-20) to determine the users location

  16. Ramsey County Control Points

  17. GPS Quadrangle Daily Setups

  18. Least Square Adjustments • U or M Fortran (Tom Wagemaker) • City of Mpls. Fortran (Brad Henry) • GPS Fixed, Assumed Float, Observed Angles and Observed Distances • Adjusted Float, Std. Deviation, Adj. Angles, Adj. Distances and RoP

  19. Least Squares Today • Mostly observed GPS vectors • Star*Net, C Progamming Language, MicroSurvey Software Inc.

  20. Ramsey County Published PLSS Corners

  21. UltiMap 1985 - 1996 • Acquired from Hennepin County • Enhanced from CARS program • Developed in Fortran 77 Prgm. Lng. • Apollo Hardware • Domain Editor • Token Ring • Aegis, BSD 4.3, Sys5 • CalcompPlotters and Digitizing tables

  22. UltiMap

  23. UltiMap 1985 - 1996 • Hierarchical Data Dictionary • Revision, Alternate, Master Data Storage • RCDMS • Batch Processing, $loc, $exec • SGR files con, tcon, dcon • PLC, DXF • Q*VIEW, Macros, Menus • Proprietary Database

  24. Ultimap System GBU • Good - Double Precision • Good - Apollo/HP multitasking, OS • Bad - Fortran 77 buggy – Divide by 0 • Bad - SGR files only edit 32,768 rec. • Bad – Proprietary objects leader lines • Ugly - Data Dictionary and Master, Alternate and Revision DB levels.

  25. ESRI ArcInfo/ArcStorm1996-2004 • Sun SparcStation 20 RISC Server • Sun Solaris OS • Client Server connection from Pent. PC • Exceed Hummingbird X-Windows • Proprietary DB • Checkin/Checkout – Coverages • Feature Locking

  26. ArcInfoArcStorm

  27. ArcInfoArcStorm GBU • Good – Rock Solid Computer System and OS - NIC • Bad - Difficult to initially Setup and load data • Ugly - X-Windows and X-Authority difficult to initially configure

  28. ESRI ArcSDE Enterprise DB2004- Present • Intel Based Servers Multiprocessors • FlexLM license manager. • Node Locked - Single Use License • Concurrent – Floating Licenses • Uses relational RDBMS (DB2, Informix, Oracle, MS SQL)

  29. ESRI ArcSDE Enterprise DB2004- Present • Versioned DB • Reconcile and Post • Topology • Dirty areas • Custom tools for Spatial Adjustments • Single lines for parcels • Working on Pilot for Parcel Fabric DM

  30. ArcSDE - GBU • Good - Supports large amounts of data and multiuser editing • Bad – Complex especially database compressions, keeping DB schema in order and in sync with other replications • Ugly – Topology Dirty Areas

  31. Definition of GIS • A Collection of People, Computer Hardware and Computer Software for Capturing, Managing, Analyzing and Displaying Geographic Information.

  32. GIS (Short Definition) • DATA • SYSTEM • MAP

  33. GIS ARCHITECTURE

  34. Ramsey County GIS Future • ESRI Parcel Data Model • Routing Street Centerlines • Statewide Street Centerline Model • NSAS (Urisa, NENA, DGDC) • Cloud (Web) Based Seamless Integrated Data

  35. Parcel Fabric Data Model

  36. Ramsey County Online Mapping

  37. Questions? Curt Peterson curtis.peterson@co.ramsey.mn.us Phone: 651-266-7172 PP: ftp://ftp.co.ramsey.mn.us/PubWorks/Outgoing/UofM

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