Numbers/Equations Flashcards
US Geological Survey scale
1:24:000 (inches)
Standard parking stall
10’x18’ (180 sf)
1 hectare
2.47 acres
1 square mile
640 acres
feet/acre
43,560
Perry’s Neighborhood Unit
160 acres, 10 units per acre, population 5,000
Avg. trips per day in single family home
9.52 (ITE Trip Generation)
Shift Share Analysis
Evaluates strengths & weaknesses of a specific region’s industries.
1. total employment for the local area
2. total employment for the state or entire country
3. industry employment totals at the one or two digit SIC level for the local area
4. industry employment totals at the one or two digit SIC level for state or entire country
Floor Area Ratio
Buildings total floor area/size of land on which it was built
Step-Down Ratio Method
ratio of population in a city or county at known point of time
Fertility Rate
live births/1000 in women 15-44
Cost-Effectiveness Strategy
(cost of new strategy - cost of current practice)/(effect of new strategy - effect of current practice)
Cohort Survival
Current pop + births + net migration; calculated for specific age groups
Location quotient
Divides the local employment in an industry by the national employment in the industry. A location quotient of greater than 1 means that it is an exporting industry.
Kurtosis
A measurement about data outliers
Net Operating Income (NOI)
Operating income x (1 - vacancy rate) - operating expenses
Affordability Index
Median housing price to median income. >2.5 = unaffordable
National Recreation and Park Association recommendation for ratio of parks to population
10 acres/1000 people
Big box retail
Typically 50,000+ sf
Total acreage of national forest land in the United States
192 Million (as of 2011)
Probability of an event that is certain to happen
1
Probability of an event that will not happen
0
Probability of an event that might happen
0.5
What is an analysis of the relationship between two variables called?
Regression analysis
USGS Section Size
640 acres
Land area of elementary school
10 acres
