Li, Z., and Z. Qin. 2014. "Spacing and Alignment Rules for Effective Legend Design." Cartography and Geographic Information Science 41 (4): 348-362. http://dx.doi.org/10.1080/15230406.2014.933085
When the above article was first published online, a sentence was missing from the beginning of the acknowledgements section. This is added below:
Many thanks are given to the Hong Kong Polytechnic University for the financial support [G-U686 and 184.108.40.206T5]. Furthermore, the second point in the conclusion should have been revised as follows:
Spacing rule g (spacing between adjacent lines of features and between a symbol and its description) is more important than the spacing mies a (spacing between letters of a word) and h (spacing between adjacent lines of...