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Interpreting Flags (open Schema Browser in new window)

1. Use the Schema Browser (link opens in a new window) to study the list of the SDSS's flags.

2. Type flags into the Search window and click Go.

3. Results of your search will show up in the right-hand window of the Schema Browser. Click on the very first PhotoObj link, next to the name flags. You will go to the schema browser entry for the PhotoObj view.

4. The 13^th entry in the table is flags. Click on the link to the right of flags.

5. The Data Values table shows the name, value, and description of each flag. Name is the name of the flag; this is what you will see in the Explore tool. Value is the bitmask value for the flag. Description is a short description of what the flag means.

6. The Access Functions, fPhotoFlags and fPhotoFlagsN, are needed to use the flag names in SQL queries.

Next: Search for Flags in Imaging Query Form

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