Atlas of Urban Expansion

Population

The Population of Yiyang, Hunan in 2013 was 412,685, increasing at an average annual rate of 1.9% since 1999. The population of Yiyang, Hunan in 1999 was 315,559, increasing at an average annual rate of 2.7% since 1994, when its population was 274,739.

Urban Extent

The Urban Extent of Yiyang, Hunan in 2013 was 17,304 hectares, increasing at an average annual rate of 6.8% since 1999. The urban extent in 1999 was 6,627 hectares, increasing at an average annual rate of 14.8% since 1994, when its urban extent was 3,077 hectares.

• 1994
• 1999
• 2013

•  
• Urban Extent
• Urban Built-up
• Suburban Built-up
• Rural Built-up
• Urbanized Open Space
•  
• Exurban Area
• Exurban Built-Up Area
• Exurban Open Space
•  
• Rural Open Space
• Rural Open Space

Density

Built-up Area Density in Yiyang, Hunan in 2013 was 41 persons per hectare, decreasing at an average annual rate of -4.6% since 1999. The built-up area density in 1999 was 79 persons per hectare, decreasing at an average annual rate of -13.2% since 1994 when the built-up area density was 156.86 persons per hectare.

The Urban Extent Density in Yiyang, Hunan in 2013 was 24 persons per hectare, decreasing at an average annual rate of -4.9% since 1999. The urban extent density in 1999 was 48 persons per hectare, decreasing at an average annual rate of -12.2% since 1994 when the urban extent density was 89 persons per hectare.

Composition of Added Area

A total of 5,963 hectares of built-up area was added to the Yiyang, Hunan urban extent between 1999 and 2013. Of that added built-up area, 16% was Infill, 57% was Extension, 0% was Leapfrog, and 27% was Inclusion. A total of 2,236 hectares of built-up area was added to the urban extent between 1994 and 1999. Of that added built-up area, 24% was Infill, 59% was Extension, 0% was Leapfrog, and 17% was Inclusion.

• 1994–1999
• 1999–2013

• Built-up Area
  1994
• Infill
• Extension
• Leapfrog
• Inclusion

Roads

Average road width in the Yiyang, Hunan 1990-2014 expansion area was 6.8 meters, compared to 10.71 meters in its pre-1990 area.

The share of built-up area in Yiyang, Hunan occupied by roads in the 1990-2014 expansion area was 16%, compared to 17% in the pre-1990 area.

• Pre 1990
• 1990 – 2014

Arterial Roads

The density of arterial roads in Yiyang, Hunan's 1990-2014 expansion was 0.83 km/km2, compared to 1.64 km/km2 in its pre-1990 area.

The share of built-up area within walking distance of an arterial road in Yiyang, Hunan's 1990-2014 expansion area was 77%, compared to 91% in the pre-1990 area.

• 1994
• 2013

Blocks and Plots

Average block size in Yiyang, Hunan's 1990-2014 expansion area was 13.1 hectares, compared to 10.4 hectares in its pre-1990 area.

• Pre 1990
• 1990 – 2014