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DNR historical lake survey","url":"https://apps.dnr.wi.gov/doclink/lakes_maps/2480800a.pdf","surveyDate":"1971-06","notice":"June 1971 survey: one original western 15 ft arc and one southern 25 ft arc between matching printed depth labels. Printed number gaps remain open. Isolated 32 ft and 35 ft soundings are excluded. Other contours and rejected ink branches remain undigitized; no gaps are reconnected. The original source lists 113.2 acres. Neighboring Sand Lake and Baker Lake graphics are excluded. Clipped to exact current DNR WBIC water and islands using the unchanged reviewed historical shoreline affine. Maximum independently held-out historical placement mismatch about 59 m excludes manual source-bank picking uncertainty. Partial 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":"f066ea74be70824d1b7aa0b3669aa2f168df96a657048cd9930e958709107047","sourceURL":"https://apps.dnr.wi.gov/doclink/lakes_maps/2480800a.pdf","scope":"Verified attribution notice on appended source-information page; not a graphic-republication license"}},"originalWaterAreaAcres":113.2},"sourceSha256":"f066ea74be70824d1b7aa0b3669aa2f168df96a657048cd9930e958709107047","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":"f066ea74be70824d1b7aa0b3669aa2f168df96a657048cd9930e958709107047","sourceURL":"https://apps.dnr.wi.gov/doclink/lakes_maps/2480800a.pdf","scope":"Verified attribution notice on appended source-information page; not a graphic-republication license"}},"partialCoverage":true}