Table 7 Completeness defined as the percentage of successful height measurements of the total possible in the photograph coverage

From: Digital elevation model and orthophotographs of Greenland based on aerial photographs from 1978–1987

Land cover

1978

1981

1985

1987

All

Ice/snow, # measured heights

58,525,111

51,673,007

77,815,533

26,683,099

214,696,750

Ice/snow, # interpolated heights

104,124,608

105,690,106

89,128,630

71,333,444

370,276,788

Ice/snow, completeness (%)

36

33

47

27

37

Ice-free, # measured heights

227,871,683

80,380,392

235,502,462

112,388,069

656,142,606

Ice-free, # interpolated heights

138,718,016

127,681,459

147,065,396

102,999,959

516,464,830

Ice-free, completeness (%)

62

39

62

52

56

All, # measured heights

286,396,794

132,053,399

313,317,995

139,071,168

870,839,356

All, # interpolated heights

242,842,624

233,371,565

236,194,026

174,333,403

886,741,618

All, completeness (%)

54

36

57

44

50

  1. The completeness on ice/snow is significantly less than for the ice-free terrain land coverage class. It is particularly evident that the combined effects of snow in the interior of the ice sheet and ice caps, and shadows in deeply incised valleys have a large impact on overall completeness in the southeast (1981) and east (1987).
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