Using Geographical Information Systems to Enhance Public Finance Analyses

Transcription

1 Using Geographical Information Systems to Enhance Public Finance Analyses Presented by: Bob Wallace, P.E., AICP November 5, 2009 Presentation Overview Introduction 2008 Recap New Application: GIS & Fire Services Planning Enhanced Approach: GIS & School Impact Fees 1

2 Introduction Using GIS to: Extract demographic data and other data Identify variations in demand for services by service or benefit area Demand for fire services Variation in student generation rates by dwelling unit type Expand on last year s session: Enhance impact fee and other public finance analyses by using GIS Methodology spreading quickly 2009: FL - Volusia, St.Lucie, Osceola, Sumter, City of Bartow; MT - Lewis & Clark Presentation Overview Introduction 2008 Recap New Application: GIS & Fire Services Planning Enhanced Approach: GIS & School Impact Fees 2

3 2008 Recap Volusia County, Florida GIS Approach to Student Generation Rate (SGR) 1) Extracted # of dwelling units from property appraiser parcel database 2) School District provided geocoded student addresses 3) Joined student data to parcel layer to get students per dwelling unit (by type) 2008 Recap St. Lucie County, Florida GIS & Density Approach to Creating Fee Districts Used GIS to illustrate density variation Density Variation: Density per capita infrastructure cost 3

4 2008 Recap St. Lucie County, Florida GIS & Density Approach to Creating Fee Districts Used GIS to colorcode calls by fire station 1) Confirmed distinct service areas 2) Created district boundaries Presentation Overview Introduction 2008 Recap New Application: GIS & Fire Services Planning Enhanced Approach: GIS & School Impact Fees 4

5 GIS & Fire Services Planning Station/Facility Planning Application: Determine demand 1 vs. 2 more stations? Identify optimal station location Urban or rural? Stage construction based on segmented population growth Now or in 5 years? GIS & Fire Services Planning GIS Methodology: Create service/fee districts: Extract population/density data Road Network/ Locate geographical barriers Variation in demand: Map incident data 5

6 City of Bartow Population Growth City of Bartow Response Times (Road Network) 6

7 City of Bartow Fire Facilities Plan 1) Relocate existing station vs. new? 2) Where to buy land for second station? 3) Timing for station construction? 4) Capital & operating financial plan Presentation Overview Introduction 2008 Recap New Application: GIS & Fire Services Planning Enhanced Approach: GIS & School Impact Fees 7

8 GIS & School Impact Fees Basic Impact Fee Formula: (Cost credit) x Demand Student Generation Rate (students per dwelling unit) GIS Approach Issues: Extracting dwelling units Student data parcel data matching Osceola SIF Issues in SGR Analysis New Methodology: Actual vs. Sample Variable Dwelling Units Student Count 2003 Original Census (sample) PUMS (sample) Data Source 2009 Proposed Property Appraiser Parcel Database (actual) School District Student Enrollment (actual) Client Input: Accept New Method? Back Up If Challenged? 8

9 Osceola County Use GIS to Link Student Data with Parcel Data Osceola County Confirm Land Use Designations with Site Checks Property Appraiser labeled student address as industrial park field verification used to confirm multi-family/apartment land use 9

10 Osceola SIF Issues in GIS GIS Tasks Student Data Acceptable match rate What is good? 98% Client GIS Capabilities Ability to zoom in to specific areas and designate units with appropriate land use category Osceola SIF Issues in SGR Analysis Enhanced Method: LUC Building Code Property Appraiser Parcel Data Layers Land Use Code vs. Building Code Parcel Count vs. Unit Count Description Land Use Code Building Code Unit Count Student Count Single Family , ,734 34,592 Townhouse ,035 1,944 Multi-Family , 1000, 1100, ,068 5,214 Condominium , 6000, ,480 1,858 Mobile Home ,217 2,544 10

11 Osceola SIF Issues in SGR Analysis Expand Land Use Equitable Distribution Expand land use schedule Program Administration Issues E.g. Feasibility of obtaining State required condo papers Single Family Multi-Family { Single Family Townhouse NEW! Mobile Home { Multi-Family Condo NEW! Mobile Home Osceola SIF Issues in SGR Analysis Client Input: Preference for Low/High SGR? Original Land Use Schedule SGR Expanded Land Use Schedule Single Family SGR Single Family Townhouse Multi-Family Multi-Family Mobile Home Condominium Mobile Home

12 Osceola SIF Issues in SGR Analysis Enhanced Method Recap: Move from land use layer to building code layer Expand land use schedule Equitable distribution of student generation rates Field verification to confirm land use/ building designations 98% accuracy Thank You National Impact Fee Roundtable Bob Wallace, P.E., AICP 1595 S. Semoran Blvd., Suite 1540 Winter Park, FL Ph

13 Sumter County 2 District Fire Impact Fee Map station locations Map City limits Sumter County 2 Districts Fire Impact Fee Æ Variables by District Extract Socio-Economic Data by District Æ Population as basis for Level of Service (Demand Component) INSERT MAP Pop/Emp 13

14 Sumter County Incident Data by District Variation in Demand INSERT MAP - Calls 14