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

curtis.peterson@co.ramsey.mn.usPhone: 651-266-7172

PP: ftp://ftp.co.ramsey.mn.us/PubWorks/Outgoing/UofM