Binning scheme for optimizing database accesses for genomic annotations that cover a particular region of the genome. This diagram shows bins of three different sizes. Features are put in the smallest bin in which they fit. A feature covering the range indicated by line Awould go in bin 1. Similarly, line B goes in bin 4 and lineC in bin 20. When the browser needs to access features in a region, it must look in bins of all different sizes. To access all the features that overlapped or were enclosed by line A, the browser looks in bins 1, 2, 3, 7, 8, 9, 10, and 11. For B the browser looks in bins 1, 4, 14, 15, 16, 17. For C, the browser looks in bins 1, 5, and 20.
