Lahijan: city in Gilan, Iran
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 Lahijan, Iran on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in Lahijan as of 2014, the overall level of street-network sprawl is 1.87, which is relatively well-connected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 1.46, 2.16, 5.1 and 8.54. In each period, new street development in Lahijan steadily grows more disconnected than in the last.
Quantity of street network construction: The street network in Lahijan spans a total of 201 kilometers. It is dominated by roads constructed in 1976-1990. These roads have an SNDi of 2.16, which is relatively well-connected.
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 1.46, 1.84, 1.86 and 1.87. Overall, the SNDi of the aggregate street network has risen: the street network in Lahijan has become more disconnected. This increase has slowed: between 1975 and 1976-1990, SNDi rose by 0.39 points, but between 1991-2000 and 2001-2014, it rose by just 0.02.
Lahijan and Gilan do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Lahijan rose steadily, while the SNDi of street constructions in Gilan followed a zig-zag trend with an overall increase.
How do development practices in Lahijan fare in comparison to others in Gilan? Most recently in 2001-2014, street construction in Lahijan was the 2nd-most disconnected out of the 6 cities in Gilan. Its position in the ranks since 1975 has risen; relative to other cities in Gilan, street construction in Lahijan has become more disconnected. Lahijan ranked 6th in 1975, 3rd in 1976-1990, 2nd in 1991-2000 and 2nd in 2001-2014.
Lahijan and Iran do not follow the same trend in the disconnectivity of their street network constructions. The SNDi in Lahijan rose steadily, while the SNDi of street constructions in Iran was at its lowest in 1976-1990.
How do development practices in Lahijan fare in comparison to others in Iran? Most recently in 2001-2014, street construction in Lahijan was the 4th-most disconnected out of the 181 cities in Iran. Its position in the ranks since 1975 has risen; relative to other cities in Iran, street construction in Lahijan has become more disconnected. Lahijan ranked 94th in 1975, 59th in 1976-1990, 15th in 1991-2000 and 4th in 2001-2014.
Lahijan and Gilan do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Lahijan rose steadily, while the SNDi of street constructions in Gilan was at its lowest in 1976-1990.
To date, Lahijan is the 5th-most disconnected out of the 6 cities in Gilan. Its position in the ranks since 1975 has risen; relative to other cities in Gilan, the street network in Lahijan has become more disconnected. Lahijan ranked 6th in 1975, 5th in 1976-1990, 5th in 1991-2000 and 5th in 2001-2014.
Lahijan and Iran do not follow the same trend in the disconnectivity of their aggregate street networks. The SNDi in Lahijan rose steadily, while the SNDi of street constructions in Iran was at its lowest in 1976-1990.
To date, Lahijan is the 101st-most disconnected out of the 181 cities in Iran. Its position in the ranks since 1975 has fallen; relative to other cities in Iran, the street network in Lahijan has become more connected. Lahijan ranked 94th in 1975, 78th in 1976-1990, 85th in 1991-2000 and 101st in 2001-2014.
As of 2015, Lahijan had a built-up area of 10.37 square kilometers, and a population of 95123 people.
These are some other cities with approximately the same population: