Street connectivity
| | |
Alpha index3
|
1 k
|
Ratio of observed to maximum possible route alternatives between nodes (intersections); high values indicate high connectivity.
|
Beta index3
|
1 k
|
Ratio of links (connections between nodes) to nodes; high values indicate high connectivity.
|
Cul de sac density3
|
1 k
|
Number of cul de sacs (single-link nodes) per square kilometer; low values indicate high connectivity.
|
Cyclomatic index3
|
1 k
|
Number of route alternatives between nodes; high values indicate high connectivity.
|
Gamma index3
|
1 k
|
Ratio of observed links to the maximum number of links; high values indicate high connectivity.
|
Intersection density
|
1 k
|
Number of 3- or more-way intersections (≥links in a single node) per square kilometer
|
Commercial database of U.S. businesses (1995)
|
Physical activity facilities
| | |
Instruction (count)
|
3 k
|
Dance studios, basketball instruction, martial arts
|
Member (count)
|
3 k
|
Athletic club and gymnasium, tennis club, basketball club
|
Outdoor (count)
|
3 k
|
Sporting and recreation camps, swimming pools
|
Public (count)
|
3 k
|
Public beach, pools, tennis courts, recreation centers
|
Public fee (count)
|
3 k
|
Physical fitness facilities, bicycle rental, public golf courses
|
Youth organization (count)
|
3 k
|
Boy/Girl Scouts, youth centers
|
ESRI StreetMap Pro, parks component (2003)
|
Parks (count)
|
3 k
|
Local parks and recreation areas, classified by Census Bureau classification code
|
National land cover dataset (1992)
| | |
Landscape diversity
| | |
Mean patch size
|
1 k
|
Total land patch area divided by the number of patches (square meters)
|
Patch size variability
|
1 k
|
Square root of the sum of the squared deviations of each patch area from the mean patch area, divided by the number of patches
|
Land patch density
|
1 k
|
Number of land patches per hectare
|
Simpson's diversity index
|
1 k
|
Represents the probability that any two pixels selected at random would be different patch types.
|
Contagion index
|
1 k
|
Measures texture based on aggregation and interspersion of land patch types
|
Perimeter-fractal dimension
|
1 k
|
Measures perimeter and shape complexity
|
Patch richness3
|
1 k
|
Number of different patch types (classes)
|
Mean shape index3
|
1 k
|
Mean shape index, which measures patch shape and compaction.
|
Mean fractal dimension index3
|
1 k
|
Measures perimeter and shape complexity across a range of spatial scales (patch sizes)
|
U.S. Census (1990)
| | |
Population count
|
1 k
|
Count of persons within buffer
|
% below poverty
|
CT
|
Percent of persons living in households with income below the federal poverty level
|
% minority
|
CT
|
Percent of persons with race/ethnicity other than white non-Hispanic
|
% college educated
|
CT
|
Percent of persons 25 years and older with at least a college education
|
Median household income
|
CT
|
Median household income
|
% homeowners
|
CT
|
Percent of households who own (versus rent) their homes
|
Uniform Crime Reporting data (1995)
|
Crime rate
|
Co
|
Number of non-violent and violent crimes per 100,000 population
|