QDGC – quarter-degree grid cells (or QDS – quarter-degree squares) are a way of dividing the longitude and latitude degree square cells into smaller squares, forming in effect a system of geocodes. Historically QDGC has been used in a lot of African atlases.
QDGC – quarter-degree grid cells (or QDS – quarter-degree squares) are a way of dividing the longitude and latitude degree square cells into smaller squares, forming in effect a system of geocodes. Historically QDGC has been used in a lot of African atlases.
Source: Wikipedia "QDGC" · CC BY-SA 4.0
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