• Displaying personal annotation data in the Genome Browser
• Adding a personal annotation track to the Genome Browser website
• Defining filter parameters for custom tracks
• Coloring a custom track using the useScore parameter
• Constructing a Genome Browser URL
• Using the hgsid parameter in a URL
• Creating a details page for a custom annotation track
• Custom annotation track troubleshooting

Question:
"How do I display my own personal annotation data in the Genome Browser?"

Response:
To create an annotation track that will display on the Genome Browser, you must first organize your data into one of the four formats supported by the browser: GTF, GFF, BED, or PSL. The formatted data is then pasted in or uploaded into the Genome Browser. Once you've created your annotation track, you can share it with others over the internet by putting your annotation file on your website, then creating a custom URL that will allow others to directly start the browser with your track displayed.

Read Displaying Your Own Annotations in the Genome Browser for a step-by-step description of how to format and display a custom annotation track, and how to create a custom URL.

Question:
"I have an annotation track that I think might be of general interest to the research community. Will UCSC consider including my track in their browser?"

Response:
We are always interested in receiving new annotation tracks for the Genome Browser, and encourage our users to share their tracks with us and others in the research community. Please send the URL for your track -- along with a description of the methods, data, and format used -- to lowe @ soe.ucsc.edu. If your track is of general interest to distribute as part of our browser, we'll work with you to include it.

Question:
"Is it possible to define a filter parameter for a custom track to highlight certain features?"

Response:
This feature is not currently implemented.

Question:
"When designing a custom track, is there a way to assign specific colors to each segment, as is done in the mouse/rat synteny tracks? Is there a way to assign a value range for the useScore variable such that I can have four shades and specify the value range for each?"

Response:
Currently useScore works only with tracks that are black or specific shades of brown or blue. The score range is 0-1000. To display four shades, use the scores 0, 333, 666, and 1000.

Question:
"How can I construct a URL to retrieve data from the Genome Browser? What do the various parameters in the Genome Browser URLs mean?"

Response:
One way to determine how to construct a correct URL is to open a Genome Browser link in which you are interested and examine how the Genome Browser constructs the URL. See the Custom Annotation Track documentation for a discussion of the basic components of a Genome Browser URL. Note that the c parameter that appears in some URLs specifies the chromosome name or the chromosome name and position.

Question:
"Should I use the hgsid parameter in my URL?"

Response:
You should try to avoid using hgsid. It is a temporary identifier, and will typically stop working after a day.

Question:
"While working on a custom track, we noticed that the feature details page for custom track looks different from regular tracks on the site. Is the details page for a custom track customizable?"

Response:
This feature is not currently implemented.

Question:
"When I click the Submit button, I get the error message "line # of custom input: BED chromStarts[i] must be in ascending order"."

Response:
We have tightened up the input checking on custom tracks. This error is caused by a logical conflict in the Genome Browser software. It accepts custom GFF tracks that have multiple "exons" at the same position, but not BED tracks that have this feature. Because the browser translates GFF tracks to BED format before storing the custom track data, GFF tracks with multiple exons will cause an error when the BED is read back in. To work around this problem, remove duplicate lines in the GFF track.