Which statement correctly describes reading grid coordinates for a 1,000-meter grid?

• A. The digits from the left and down form the 1,000-meter grid square
• B. The digits from the right and the digits from the up together form the 1,000-meter grid square
• C. The three digits from the right form the grid
• D. Grid coordinates do not involve specific digit order

Answer: (B)

Reading a 1,000-meter grid means locating the exact 1-km square by its easting and northing within the map’s grid. Each square is defined by two numbers: easting (how far to the east) and northing (how far to the north). The digits you use come from the map margins: the digits on the right edge show the eastings, and the digits on the top edge show the northings. Put the eastings together with the northings to identify the specific 1,000-meter square. This is why that statement is the best choice: it correctly describes which digits contribute to forming the 1,000-meter grid square (eastings from the right, northings from the up). Other ways of reading the grid would either misstate which margins hold the digits or deny that order. In practice, you follow that two-number pair whenever you’re marking a 1-km square on a map, then, if you need a point inside that square, you add more digits for a location inside that square.