This is a set of 287000 geographic points together with their coordinates in the transverse Mercator projection. The WGS84 ellipsoid (equatorial radius a = 6378137 m, flattening f = 1/298.257223563) is used, with central meridian 0°, central scale factor 0.9996 (the UTM value), false easting = false northing = 0 m. Each line of the test set gives 6 space delimited numbers latitude, φ (degrees, exact) longitude, λ (degrees, exact — see below) easting (meters, accurate to 0.1 pm) northing (meters, accurate to 0.1 pm) meridian convergence (degrees, accurate to 10−18 deg) scale (accurate to 10−20) These are computed using high-precision calculations using the exact formulas for the projection, see Lee (1976). The latitude and longitude are all multiples of 10−12 deg and should be regarded as exact, except that λ = 82.63627282416406551° should be interpreted as exactly (1 − e) 90°, where e is the eccentricity given by e2 = f (2 − f ). The contents of the file are as follows: 250000 entries randomly distributed in φ ∈ [0°, 90°], λ ∈ [0°, 90°] 1000 entries randomly distributed on φ ∈ [0°, 90°], λ = 0° 1000 entries randomly distributed on φ = 0°, λ ∈ [0°, 90°] 1000 entries randomly distributed on φ ∈ [0°, 90°], λ = 90° 1000 entries close to φ = 90° with λ ∈ [0°, 90°] 1000 entries close to φ = 0°, λ = 0° with φ ≥ 0°, λ ≥ 0° 1000 entries close to φ = 0°, λ = 90° with φ ≥ 0°, λ ≤ 90° 2000 entries close to φ = 0°, λ = (1 − e) 90° with φ ≥ 0° 25000 entries randomly distributed in φ ∈ [−89°, 0°], λ ∈ [(1 − e) 90°, 90°] 1000 entries randomly distributed on φ ∈ [−89°, 0°], λ = 90° 1000 entries randomly distributed on φ ∈ [−89°, 0°], λ = (1 − e) 90° 1000 entries close to φ = 0°, λ = 90° (φ < 0°, λ ≤ 90°) 1000 entries close to φ = 0°, λ = (1 − e) 90° (φ < 0°, λ ≤ (1 − e) 90°) The entries for φ < 0° and λ ∈ [(1 − e) 90°, 90°] use the “extended” domain for the transverse Mercator projection explained in Sec. 5 of Karney (2011). The first 258000 entries have φ ≥ 0° and are suitable for testing implementations following the standard convention.

{"references": ["L. P. Lee, Conformal Projections Based on Elliptic Functions, (B. V. Gutsell, Toronto, 1976).", "C. F. F. Karney, Transverse Mercator with an accuracy of a few nanometers, J. Geodesy 85(8), 475-485 (2011)."]}