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Area-weighted edge density
Variable Definition
Total perimeter of all patches multiplied by the corresponding area weight, and divided by the total area of the geographic unit. This is the area-weighted version of edge density. By weighting by patch size, larger urban patches have a higher influence in this weighted-average metric. Researchers could decide at their own discretion on using this weighted index or the corresponding unweighted one. Interpretation: Indicator of fragmentation and shape complexity. A higher value indicates, for the same total area of urban patches: (1) there are likely to be more smaller patches versus fewer larger patches, and (2) on average, patches have a more complex shape.
Variable Information
- Variable Name
- BECAWEDGDENS
- Observation Type
- area-level
- Value Type
- double
- Domain
- Built and Natural Environment
- Subdomain
- Urban Landscape
Coverage
- Years Available
- 1985;1990;1995;2000;2005;2010;2015;9999
- Countries
- Argentina, Brasil, Chile, Colombia, Costa Rica, El Salvador, Guatemala, Mexico, Nicaragua, Panama, Peru
- Geographic Levels
- L1ADL1UXL1XSL2
- Public Access
- ⓘ Restricted (Contact salurbal.data@drexel.edu)
Data Availability by Country and Year
| Year | AR | BR | CL | CO | CR | GT | MX | PA | SV | PE | NI |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1985 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1990 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1995 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2000 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2005 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2010 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2015 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 9999 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Data Sources
| ISO2 | Year | Source |
|---|---|---|
| AR;BR;CL;CO;CR;GT;MX;NI;PA;PE;SV | 1985;1990;1995;2000;2005;2010;2015;9999 | High spatiotemporal resolution mapping of global urban change from 1985 to 2015; Global Urban Footprint (GUF), 2012 |
Data Access Information
SALURBAL respects the Data Use Agreements of our data sources. Some data is not publicly available.
To request access to non-public data or for more information about our data, please contact salurbal.data@drexel.edu.