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DNR historical lake survey","url":"https://apps.dnr.wi.gov/doclink/lakes_maps/2463100a.pdf","surveyDate":"1972-05","notice":"May 1972 survey: two original 6 ft arcs in West Elbow and two original 8 ft arcs in East Elbow. Original number gaps remain open. Exact water clipping splits these four source paths into six rendered parts without connectors. The isolated East X symbol is excluded. Other 3 ft and 5 ft contours remain undigitized where source ink meets grid lines or chart markings. Clipped to current DNR WBIC water and the reviewed separate historical main-basin footprints and original East island. Neighboring pond graphics and the uncertain southern Cottail zone are excluded by a conservative coverage cut, not a claimed complete historical shoreline. The source lists 233 acres. Its West/East assumed water-level values 93.03/96.77 are not new depths. A disclosed component-prefix geographic identifier error was corrected with the original failed trial retained; original source pixels remain unchanged. Maximum independently held-out historical placement mismatch about 43 m excludes manual source-bank picking uncertainty. Historical depth facts, not current measurements. Not for navigation.","reuse":"Factual depth geometry redrawn with source attribution; not an agency license or CC0 claim","reuseBasis":{"assessment":"Factual-data derivative interpretation, not an explicit agency license or CC0 claim","factsGuidance":"https://www.copyright.gov/comp3/chap300/ch300-copyrightable-authorship.pdf","mapAuthorshipGuidance":"https://www.copyright.gov/comp3/chap900/ch900-visual-art.pdf","sourceUsePolicy":"https://dnr.wisconsin.gov/legal/acceptableuse","sourceNotice":"A Public Document - Please Identify the Source when using it.","graphicRepublished":false,"limitations":"Source website terms remain relevant; reassess for commercial sale or image republication.","sourceNoticeVerified":true,"sourceNoticeEvidence":{"pages":[2],"sourceSha256":"87fe028d7a4f07785ba787e7677715951161b909b01cbe3558e289cf00156bc8","sourceURL":"https://apps.dnr.wi.gov/doclink/lakes_maps/2463100a.pdf","scope":"Verified attribution notice on appended source-information page; not a graphic-republication license"}},"originalWaterAreaAcres":233},"sourceSha256":"87fe028d7a4f07785ba787e7677715951161b909b01cbe3558e289cf00156bc8","reuseBasis":{"assessment":"Factual-data derivative interpretation, not an explicit agency license or CC0 claim","factsGuidance":"https://www.copyright.gov/comp3/chap300/ch300-copyrightable-authorship.pdf","mapAuthorshipGuidance":"https://www.copyright.gov/comp3/chap900/ch900-visual-art.pdf","sourceUsePolicy":"https://dnr.wisconsin.gov/legal/acceptableuse","sourceNotice":"A Public Document - Please Identify the Source when using it.","graphicRepublished":false,"limitations":"Source website terms remain relevant; reassess for commercial sale or image republication.","sourceNoticeVerified":true,"sourceNoticeEvidence":{"pages":[2],"sourceSha256":"87fe028d7a4f07785ba787e7677715951161b909b01cbe3558e289cf00156bc8","sourceURL":"https://apps.dnr.wi.gov/doclink/lakes_maps/2463100a.pdf","scope":"Verified attribution notice on appended source-information page; not a graphic-republication license"}},"partialCoverage":true}