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The Albers Equal-Area Conic Projection is an area-preserving conic projection widely used in geographic information systems (GIS) and cartography.
The projection is created by wrapping the Earth’s surface in a cone and unrolling it. It is based on two standard parallels (usually set in mid-latitudes) between which the shape of the area is minimally distorted while preserving the true area.
This projection is widely used for mapping the United States, but is also suitable for countries or regions located in mid-latitudes such as Japan.
This projection is different from a formal geodetic projection and is not usually provided as a standard feature in general-purpose cartography or GIS tools. However, it is often used in visual analysis, education, or visualizations to show the relationship between specific areas.
In geospatial data formats such as GeoTIFF, Shapefile, GeoJSON, etc., the parameters of the Albers Equal Area Conic projection include:
The Albers Conic projection is particularly suitable for statistical or thematic map production that requires area accuracy, such as forest resource management, soil classification, land cover classification, population density, climate zone visualization, etc., especially in situations where area distribution information is important.
In addition, in countries with a large east-west span such as the United States and Canada, it is often used as a national standard projection method.
Transverse Mercator Projection
Longitude / Latitude Projection