Download
land use planning n.
Skip this Video
Loading SlideShow in 5 Seconds..
Land Use Planning PowerPoint Presentation
Download Presentation
Land Use Planning

Land Use Planning

159 Vues Download Presentation
Télécharger la présentation

Land Use Planning

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Land Use Planning Making Physical Connections – Part 1 How Much Land Do I Need For What?

  2. The Inventory • Current Land Data • SIC Codes – 2, 4, 6 digit • Land Based Classification System

  3. SIC Codes • Nine one-digit groups - #3 Trade • 67 two digit groups – Retail> food • 294 three-digit groups • 772 four digit groups • 3457 six digit groups • Auxiliary groups

  4. Example SIC Codes • 0259 - Egg farms – poultry except chicken and turkey • 0279 - Honey Production • 5999 - Hot tubs – retail • 3716 - Recreational Vehicles • 7377 - Computer Rentals • http://www.wave.net/upg/immigration/sic_index.html

  5. Land Based System • Activity Codes • Function Codes • Ownerships Codes • Site Codes • Structure Codes • Classification Data Base

  6. Product – Current Map • The land use • Structure Type • Age of structure • Condition • Conformance

  7. Current Parcel Uses

  8. Lot By Lot – Land Use

  9. Building Condition Map

  10. Next Step - Standards • Purpose – To compare our community’s land use to current standards • Outcome – To pinpoint deficiencies • Link – To program needs into future land use plan

  11. Journey To Land Use • When you come to a fork in the road – take it • Yogi Bera

  12. Before Going On! • Three Characteristics of Population • Size (basic yardstick for space needs) • Composition (age, household type ..) • Spatial Distribution (where people are located)

  13. Population Terms • Estimate – applies only to a time period between censuses or the current time • Projection – Is a set of methods to determine future population size based on past assumptions • Forecast – Effort to accurately predict a future population point based on modeled assumptions

  14. Population Data • Primary Data – how do you obtain local primary data? • Secondary Data – Census?

  15. Population Standards • Determine growth factors • Project population • Compare rates of growth/decrease with peers • Use comparative models to determine reasons for variance from peers

  16. The Methods • The Big Four Methods • Trend Extrapolation • Ratio/Share • Disaggregate/simulation/component • Symptomatic Association

  17. Trend Extrapolation • Quick – dirty – but generally works in normal populations • Linear Model • Exponential Change – compounding method. Rate of change is constant but the absolute change increases with compounding

  18. Linear Series

  19. Exponentials - Polynomials • Patterns of smaller and smaller incremental growth • Complicated patterns of growth change on regular frequencies • Explosive then incipient growth

  20. Exponentials - Polynomials

  21. Ratio- Share • Used only to estimate the ratio of small unit population to a larger/known unit • Extraterritorial areas • CEA units Unknown Population Known Population

  22. Disaggregate • Cohort – component method • Components of change methods – Chicago transportation/land model • Vacancy/housing estimate models Cohorts

  23. Symptomatic Models • A statistical equation is applied to known indicators: • Jobs • Building permits • School Enrollment • Water/power consumption

  24. Population Variants – Estimate Projection Intervals • Est. World Pop 1950 – 2,523 • Est. World Pop 1990 – 5,687 • Low Variant 2050 – 7,662 • Medium Variant 2050 – 9,366 • High Variant 2050 – 11,156

  25. World Pop. Variance High Series High Series

  26. Population Method Problems • Forecasting when you should be projecting • The long range fairy (25 years) • Very rapid gains • Small area analysis rather than city as a whole • Large area analysis rather than just the reporting district

  27. Translate Population • Housing needs • Retail/Trade Needs • Facilities needs • Manufacturing needs • Open space needs

  28. Translating Requirements • Per capita approach – standards • Requires an LOS assumption 5.6 Ac. Parkland per 1,000 245 Structures per five miles per pumper Pad to parking ratio of 3:1 &5% water retention of record 10 year event

  29. Translating Requirements • Demand approach • Based on current investigation of actual demand under the assumption that one size does not fit all • Income distribution approach • Survey approach for mass transit • Maintenance and useful life approach

  30. Set Density Standards • L.U.I Index (Land Use Intensity) Calculation of the of floor area ratio to the open space ratio Ranges from 1 du/40Ac. To 650 du’s/Ac Calculate slack space equal to about 25% of all land area that is used for roads, facilities, and utilities

  31. Just Checking!

  32. Housing Needs • Disaggregation • Unit demand per population mix • Average square feet per mix • Pad site • Parking Ratio • Per/L.U.I mix

  33. Density = 4.0 DU/Ac 8 units on 2 Ac. Lot Size 9,114 sf PAD = 1,490 sf Parking 500 sf

  34. 32 units on 3.35 Ac Lot size 3,465 sf PAD 1,120 sf Parking 220 sf 9.55 DUs/Ac

  35. Retail Trade Needs • Neighborhood Trade • Maximum travel distance = 4 min • Gross sf per family = 175 • Typical requirement = 7.5 acres • Parking Ratio 2 to 1 • Total requirements 319,200 sf

  36. Community Cluster • Community Cluster • Maximum travel distance = 15 min • Gross sf per family = 35 sf • Typical requirement = 25 Ac (also equals one Super Wal-Mart • Parking Ratio = 3 to 1 • Pad site = 412,500 – 1,250,000sf

  37. Regional Shopping • Regional Scale Facilities – 60 miles • 100,000 population served • Gross sf per family = 40 • Pad sites = 1.1 million sf • Parking ratio = 4 –1 • Total site requirements 60 Ac.

  38. Galleria – Example Ratios

  39. Regional SuperBlock

  40. Another View

  41. Facilities Calculations • Roads – streets – public parking and utility easements = .30 gross • Land Fill = 80 Ac per 20,000 served or 170 sf per person • Sewer = 60 Ac. Per 10,000 served or 85 Ac with sludge injection • Water = 252 Ac Ft. processed per 100 persons = 34 Ac/10,000 pers

  42. Land Use Ratio - Visual

  43. High Density Mobile Home Park

  44. Facilities …………… • Schools – Neighborhood System • Kindergarten Center – 15 Ac (220) • Elementary Center – 20 Ac (240) • Middle School - 40 Ac (650) • High School 60 Ac (1,250)

  45. School Sites

  46. Middle School Site

  47. NEIGHBORHOOD UNIT SYSTEM 160 Ac Target 5,000 persons per average unit