parallel reduction preserving and equal-area projection by Sanson (1650)   (Tissot's Indicatrices with 30° graticule)
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equal-area projection by Mollweide (1805)   (Tissot's Indicatrices with 30° graticule)
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equal-area renumeralised projection by Sanson   (Tissot's Indicatrices with 30° graticule)
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projection by Robinson (1963)   (Tissot's Indicatrices with 30° graticule)
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equal-area projection IV by Wagner (1932)   (Tissot's Indicatrices with 30° graticule)
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equal-area projection IV by Eckert (1906)   (Tissot's Indicatrices with 30° graticule)
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projection V by Eckert (1921)   (Tissot's Indicatrices with 30° graticule)
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equal-area projection VI by Eckert (1906)   (Tissot's Indicatrices with 30° graticule)
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equal-area (triangular) projection by Collignon (1865)   (Tissot's Indicatrices with 30° graticule)
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equal-area (diamond-shaped) projection by Collignon (1865)   (Tissot's Indicatrices with 30° graticule)
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