The Human Influence Index (HII) is a measure showing direct
human influence on ecosystem

Ecosystem

An ecosystem is a biological environment consisting of all the organisms living in a particular area, as well as all the nonliving , physical components of the environment with which the organisms interact, such as air, soil, water and sunlight....

s using using 8 measures of human presence.

Measures used

The eight measures used in computing the HII are:

• Population Density
  Population density
  Population density is a measurement of population per unit area or unit volume. It is frequently applied to living organisms, and particularly to humans...
  
  /km²
• Score of Railroads
• Score of Major Roads
• Score of Navigable Rivers
• Score of Coastlines
• Score of Nighttime Stable Lights Values
• Urban Polygons
• Land Cover Categories (urban areas, irrigated agriculture, rain-fed agriculture, other cover types including forests, tundra, and deserts)

HII values range from 0 to 64. Zero value represents no human influence
and 64 represents maximum human influence possible using all 8 measures of human presence

External links

• Official website with Download of the data in ArcGIS
  ArcGIS
  ArcGIS is a suite consisting of a group of geographic information system software products produced by Esri.ArcGIS is a system for working with maps and geographic information...
  
  grid format.
• Scott M. 2003. The Human Footprint. NASA Earth Science Enterprise Data and Services.
• Mayell H. 2002. ‘Human Footprint’ Seen on 83 Percent of Earth’s Land. National Geographic News.
• http://oceanworld.tamu.edu/resources/oceanography-book/Images/humanfootprint.gif