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DNR historical lake survey","url":"https://apps.dnr.wi.gov/doclink/lakes_maps/2651800a.pdf","surveyDate":"1967-08","notice":"August 1967 survey: one original northern 50 ft ring and two separate original main-basin 60 ft rings. Printed contour-number gaps remain open. The isolated 50, 62 and 63 ft spot soundings are excluded; the 50 ft contour is independently identified by its separate on-curve label. Other deep and shallow contours, including the southern 60 ft loop, remain undigitized. The source lists 243.32 acres. Assumed elevation 104.97 and water elevation 97.00 are not new depths. Clipped to exact current DNR WBIC water and a reviewed conservative historical in-water coverage footprint. Historical northwest, northeast head and southwest shore differences and the Wood River outlet are excluded by coverage cuts, not surveyed shorelines. The unchanged source-bank affine retains five separate held checks with maximum mismatch about 35 m, excluding 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":"5c72c4b775649c05d882edbe80f01e13f1ce216b95b784399a26bb7090af1964","sourceURL":"https://apps.dnr.wi.gov/doclink/lakes_maps/2651800a.pdf","scope":"Verified attribution notice on appended source-information page; not a graphic-republication license"}},"originalWaterAreaAcres":243.32},"sourceSha256":"5c72c4b775649c05d882edbe80f01e13f1ce216b95b784399a26bb7090af1964","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":"5c72c4b775649c05d882edbe80f01e13f1ce216b95b784399a26bb7090af1964","sourceURL":"https://apps.dnr.wi.gov/doclink/lakes_maps/2651800a.pdf","scope":"Verified attribution notice on appended source-information page; not a graphic-republication license"}},"partialCoverage":true}