Portland: city in Maine, United States
What exactly constitutes the spatial extent of the city? For these aggregations, we used the Global Human Settlement Layer Urban Center Database (GHS-UCDB) to define the boundaries of the city. These cities -- or urban centers -- cover areas that are densely populated and built-up, and so may extend beyond the spatial borders of these cities that we may be familiar with. The GHS area is shaded in blue.
View Portland, United States on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Portland as of 2014, the overall level of street-network sprawl is 2.91, which is in the 40th to 60th percentile of disconnectedness.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.75, 7.03, 3.55 and 7.03. Disconnectivity in street construction in Portland follows a zig-zag trend. In 1975, street construction was most disconnected, while construction was most connected in 1976-1990.
Quantity of street network construction: The street network in Portland spans a total of 723 kilometers. It is dominated by roads constructed prior to 1975. These roads have an SNDi of 2.75, which is in the 40th to 60th percentile of disconnectedness.
Effect on the aggregate network: New construction in each period adds to the total stock of streets, but does not change streets that have already been built. Therefore, it has a limited effect on the street network as a whole. The SNDis of the aggregate street network in the respective time periods are 2.75, 2.88, 2.88 and 2.91. Overall, the SNDi of the aggregate street network has risen: the street network in Portland has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.13 points, but between 1991-2000 and 2001-2014, it rose by just 0.03.
Portland and Maine do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Portland followed a zig-zag trend with an overall increase, while the SNDi of street constructions in Maine peaked in 1991-2000.
How do development practices in Portland fare in comparison to others in Maine? Most recently in 2001-2014, street construction in Portland was the 1st-most disconnected out of the 1 cities in Maine. Its position in the ranks since 1975 has not changed. Portland ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.
Portland and United States do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Portland followed a zig-zag trend with an overall increase, while the SNDi of street constructions in United States peaked in 1991-2000.
Portland and Maine follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
To date, Portland is the 1st-most disconnected out of the 1 cities in Maine. Its position in the ranks since 1975 has not changed. Portland ranked 1st in 1975, 1st in 1976-1990, 1st in 1991-2000 and 1st in 2001-2014.
Portland and United States follow the same trend in the disconnectivity of their aggregate street networks. The SNDi for both of these rose steadily.
As of 2015, Portland had a built-up area of 42.3 square kilometers, and a population of 88735 people.
These are some other cities with approximately the same population: