Corrections compiled by John P. Snyder and Daan Strebe (GeoCART author)
for AN ALBUM OF MAP PROJECTIONS (PROF. PAPER 1453)
by John P. Snyder and Philip M. Voxland

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Note:
This information is for editions printed before 1994.
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p. iii,	entry for p. 62:
	Putnins P2'
	SHOULD READ
	Wagner IV

p. 3,	Oblique aspect: Lines 2-4:
	the center ... Equator.
	SHOULD READ
	the axis of the Earth is rotated so it is neither aligned
	with nor perpendicular to the conceptual axis of the map
	projection.

p. 5,	table, "INTERSECTION OF" Equidistant "AND" Equal-area:
	No
	SHOULD READ
	Yes
	AT TWO PLACES.

p. 60,	64, and 82, 2nd column of each:
	Putnins P2'
	SHOULD READ
	Wagner IV

p. 62, title:
	PUTNINS P2' 
	should read
	WAGNER IV

	UNDER origin
	Presented by Reinholds V. Putnins of Latvia in 1934
	SHOULD READ
	Presented by Karlheinz Wagner of Germany in 1932

	UNDER Similar projections
	Wagner IV projection (1949)
	SHOULD READ
	Putnins P2' Equal-area projection (1934)

p 62-63, captions for figures 22A and 22B:
	Putnins P2'
	SHOULD READ
	Wagner IV

p. 82,	UNDER Usage:
	AFTER maps INSERT , by National Geographic Society for world
	map after 1988,

p. 138, caption:
	105 degrees
	SHOULD READ
	10 degrees

p. 140, last column, line 8:
	Equidistant
	SHOULD READ
	Equal-area

p. 156, UNDER Origin:
	Heinrich Berghaus (1797-1884)
	SHOULD READ
	Hermann Berghaus (1828-1890)

p. 171, caption:
	DELETE with national boundaries

p. 175, UNDER Graticule, AFTER Parallels:
	Parallel straight lines equally spaced on the meridians
	90 degrees apart from center
	SHOULD READ
	Circular arcs equally spaced on the central meridian and
	on meridians 90 degrees from center

P. 176, DITTO CORRECTION FOR P. 175

P. 191, Caption:
	10 degree graticle
	SHOULD READ
	15 degree graticle

P. 194, Caption:
	10 degree graticle
	SHOULD READ
	15 degree graticle

p. 200, UNDER Origin:
	(1852 - ?)
	SHOULD READ
	(1852 - 1921)

p. 202, UNDER Origin:
	Presented by ... 1904
	SHOULD READ
	Presented and named Van der Grinten II by Alois Bludau
	in 1912 as a modification of Van der Grinten I.

p. 203, ditto correction on p. 202, except that II becomes III

p. 204, UNDER Origin:
	(1852 - ?)
	SHOULD READ
	(1852 - 1921)

p. 221, 3rd header:
	Putnins P2'
	SHOULD READ
	Wagner IV

p. 220, 2nd line after equation (35):
	which Phi
	SHOULD READ
	which Phi / 2 is

p. 223,	line 3:
	1974):
	SHOULD READ
	1974) with Y taking the sign of Phi:

p. 230, equation (136) denominator:
	(Lambda sub A - Lambda sub o)
	SHOULD READ
	COS(Lambda sub A - Lambda sub o)

P. 230, next to last line of para. following equation (143):
	(1 - z sub o / PI)^2
	SHOULD READ
	(1 - z sub o / PI)^1/2

p. 231, equation (151):
	(1 + sin Phi)
	SHOULD READ
	(1 - sin Phi)

p. 235, equation (208):
	V = A sub 1 * A
	SHOULD READ
	V = A / A sub 1

p. 235 - 236, equations (225)-(234):
	Note that these formulas apply to one hemisphere of the
	projecton at a time. The other hemisphere requires a different
	center in lat/long and a transposed origin of the map.

p. 236, 2nd line of para. preceding equation (240):
	Phi between 0 degrees
	SHOULD READ
	Theta between 0 degrees

p. 236, two subtitles:
	Adams World in a Square I
	SHOULD READ
	Adams World in a Square II
	AND VICE VERSA

p. 237, equations (253) and (254):
	R
	SHOULD READ
	+/- R
	AFTER EQUATION (254) INSERT
	where x and y take the sign of Lambda and Phi, respectively.

p. 242, alphabetical entry:
	Aipan
	SHOULD READ
	Apian

p. 247, Rechteckige Plattcarte
	SHOULD READ
	Rechteckige Plattkarte

p. 247 and 249, Interchange all page references to Putnins P2' with
	those for Wagner IV

p. 248, alphabetical entry:
	Rosemund
	SHOULD READ
	Rosenmund