Detail
Type Dom. u. Forsth. - Niedeck is a Dom. u. Forsth.
See Gross Lengden - A See notation means the entry is dependent on another entry. In this case, Niedeck is dependent on Gross Lengden, which should be consulted for additional information.
Vgl Nideck - A Vgl (Vergleiche) notation lists places with similar spellings that you may want to compare. In this case, you may want to try searching for Nideck.