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Mission: To provide a uniform system of mapping for Ramsey County.
Goal: To establish and maintain a coordinate controlled base for computerized mapping.
Ramsey County Land Records Mapping Modernization
1984
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Records & Revenue
Mapping Project Development
Information Services
Public Works
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Development Responsibilities
Information Services• Computer Hardware• Computer Software System
Networking• System Accounting
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Development Responsibilities
Public Works• Land Surveys (traditional & GPS)• Least Squares Adjustments• PLSS Publications and Maintenance• SGR Control Skeletons• Aerial Photography • Planimetric Features
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Development Responsibilities
Property Records & Revenue• Editing and Delivery of ½ Section
Maps• Ultimap Software Master Level• Property Records Administration
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PLAT DOCUMENTS
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1985 Ramsey CountyLand Records Modernization
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1985 Ramsey CountyLand Records Modernization
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Ramsey County Surveyor’s Office
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Survey Equipment (198X)
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Survey Traverse Network
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Traverse and Network Adjustments
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Ramsey County GPS Survey October 1985
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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
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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
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Ramsey County Control Points
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GPS Quadrangle Daily Setups
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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
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Least Squares Today
Mostly observed GPS vectors Star*Net, C Progamming
Language, MicroSurvey Software Inc.
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Ramsey County Published PLSS Corners
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UltiMap1985 - 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• Calcomp Plotters and Digitizing tables
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UltiMap
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UltiMap1985 - 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
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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.
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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
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ArcInfo ArcStorm
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ArcInfo ArcStorm 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
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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)
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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
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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
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Definition of GIS A Collection of
People, Computer Hardware and Computer Software for Capturing, Managing, Analyzing and Displaying Geographic Information.
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GIS (Short Definition)
DATASYSTEM MAP
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GIS ARCHITECTURE
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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
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Parcel Fabric Data Model
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Ramsey County Online Mapping
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Questions?Curt Peterson
[email protected]: 651-266-7172
PP: ftp://ftp.co.ramsey.mn.us/PubWorks/Outgoing/UofM