SkyServer: GLossary

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hole A field or set of fields which is missing from the data, either because of non-photometric conditions, tracking problems, very poor seeing, or simply because that area has not been surveyed yet. This is encoded in the status flags.

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hole	A field or set of fields which is missing from the data, either because of non-photometric conditions, tracking problems, very poor seeing, or simply because that area has not been surveyed yet. This is encoded in the status flags.