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The National Science Digital Library provides high quality online educational resources for teaching and learning, with current emphasis on the sciences, technology, engineering, and mathematics (STEM) disciplines—both formal and informal, institutional and individual, in local, state, national, and international educational settings. The NSDL collection contains structured descriptive information (metadata) about web-based educational resources held on other sites by their providers. These providers have contribute this metadata to NSDL for organized search and open access to educational resources via this website and its services.
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In addition to the common documentation methods of cylinder seals by rolled impression and photography, this collection also offers 3D-models and digital impressions. The 3D-scans can be performed without impacting the objects, thus reducing the risks. This method allows even the most fragile of seals to be documented, including those too delicate to be used for a rolled impression. These scans offer a true-to-scale reproduction of the seals.