3.4.1 Maps where greater legibility is required

3.4.1 Maps where greater legibility is required

These may be maps of small areas to be used for training, for introductory and school events. They may be competition maps for older and younger age groups where reading fine lines and small symbols becomes a problem.

These maps must be drawn with lines, line screens and symbol dimensions 50% greater than those used for 1:15,000 maps. Where practical the same dot screens as used at 1:15,000 will give the most legible map and are therefore to be preferred. In practice drawing the artwork at 1:7,500 for reduction to 1:15,000 will give the correct dimensions if the same artwork is reduced to 1:10,000. It may be more practical and cheaper to produce a 1:10,000 version by enlarging the 1:15,000 film negatives/positives.

For 1:10,000 maps the spacing of grid lines should be 25 mm which represents 250 m on the ground.

In education there is usually a progression of scales from 1:2,500 to 1:5,000 to 1:10,000. Maps at very large scales such as 1:2,500 will clearly contain more detail such as playground equipment. Line dimensions for 1:10,000 maps should also be used for these maps.