Sheet contains four maps at the same scale (1:12 500 000) utilizing 26 coloured categories of solar radiation. For each of April and October, one map shows solar radiation and its variability on a horizontal surface, a second shows solar radiation on inclined surfaces. Data primarily for period 1956 to 1978. Companion sheet to Solar Radiation – Annual and Solar Radiation – December and June.
List of 5th Edition Maps
List of Map Archive Collections
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