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