Presentation on theme: "Mission: To provide a uniform system of mapping for Ramsey County. Goal: To establish and maintain a coordinate controlled base for computerized mapping."— Presentation transcript:
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 Hardware Computer Software System Networking Computer Software System Networking System Accounting System Accounting
Development Responsibilities Public Works Land Surveys (traditional & GPS) Land Surveys (traditional & GPS) Least Squares Adjustments Least Squares Adjustments PLSS Publications and Maintenance PLSS Publications and Maintenance SGR Control Skeletons SGR Control Skeletons Aerial Photography Aerial Photography Planimetric Features Planimetric Features
Development Responsibilities Property Records & Revenue Editing and Delivery of ½ Section Maps Editing and Delivery of ½ Section Maps Ultimap Software Master Level Ultimap Software Master Level Property Records Administration Property Records Administration
Global Positioning System (GPS) n Used widely in the surveying and construction fields n A major time saver – no line of sight n Limitations include: tree cover, buildings, and data link n Weather does not impact
How it works n Measures distance by the time it takes a signal to get from satellite to the receiver n Use at least 4 satellites (can have as many as 15-20) to determine the users location
Least Square Adjustments n U or M Fortran (Tom Wagemaker) n City of Mpls. Fortran (Brad Henry) n GPS Fixed, Assumed Float, Observed Angles and Observed Distances n Adjusted Float, Std. Deviation, Adj. Angles, Adj. Distances and RoP
Least Squares Today n Mostly observed GPS vectors n Star*Net, C Progamming Language, MicroSurvey Software Inc.
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 Calcomp Plotters and Digitizing tables
Ultimap System GBU n Good - Double Precision n Good - Apollo/HP multitasking, OS n Bad - Fortran 77 buggy – Divide by 0 n Bad - SGR files only edit 32,768 rec. n Bad – Proprietary objects leader lines n Ugly - Data Dictionary and Master, Alternate and Revision DB levels.
ESRI ArcInfo/ArcStorm 1996-2004 n Sun SparcStation 20 RISC Server n Sun Solaris OS n Client Server connection from Pent. PC n Exceed Hummingbird X-Windows n Proprietary DB n Checkin/Checkout – Coverages n Feature Locking
ArcInfo ArcStorm GBU n Good – Rock Solid Computer System and OS - NIC n Bad - Difficult to initially Setup and load data n Ugly - X-Windows and X-Authority difficult to initially configure
ESRI ArcSDE Enterprise DB 2004- Present n Intel Based Servers Multiprocessors n FlexLM license manager. n Node Locked - Single Use License n Concurrent – Floating Licenses n Uses relational RDBMS (DB2, Informix, Oracle, MS SQL)
ESRI ArcSDE Enterprise DB 2004- Present n Versioned DB n Reconcile and Post n Topology n Dirty areas n Custom tools for Spatial Adjustments n Single lines for parcels n Working on Pilot for Parcel Fabric DM
ArcSDE - GBU n Good - Supports large amounts of data and multiuser editing n Bad – Complex especially database compressions, keeping DB schema in order and in sync with other replications n Ugly – Topology Dirty Areas
Definition of GIS n A Collection of People, Computer Hardware and Computer Software for Capturing, Managing, Analyzing and Displaying Geographic Information.