This example shows a simple annotation file containing one data set in the bigBed format. This track displays random sized blocks across chr21 in the human genome. The big data formats, such as the bigBed format, can be uploaded using a bigDataUrl that is specified in the track line. For more information on these track line parameters, refer to the Track Lines section. When using bigDataUrls, data is cached and updated every 300 seconds. If you are updating your big data tracks with different displays and are not seeing your track changes in the browser, you may want to add the udcTimeout parameter to prevent caching of your track data and force a reload.
-You may paste these two lines directly into the &Add Custom Tracks& page to view this +You may paste these two lines directly into the "Add Custom Tracks" page to view this example in the browser:
browser position chr21:33,031,597-33,041,570
track type=bigBed name="bigBed Example One" description="A bigBed file" bigDataUrl=http://genome.ucsc.edu/goldenPath/help/examples/bigBedExample.bbAlternatively, you may also upload just the URL of the bigBed file:
http://genome.ucsc.edu/goldenPath/help/examples/bigBedExample.bb This will infer the track type as "bigBed" based on the file extension and set the track name to "bigBedExample".
Here is an example of a file in which the url attribute has been set to point to the file http://genome.ucsc.edu/goldenPath/help/clones.html. The