Land cover and land use in the St. Johns River Water Management District based on 2020-2022 digital orthophotography. This layer is a copy of the 2014 LCLU dataset, with updates based on conditions in the 2020-2022 orthophotography. The Photointerpretation Key accompanying the 2014 dataset remains correct in its classes and their descriptions, but is being revised to reflect the current imagery, data description and mapping process. SJRWMD LCLU 2020 Photo Interpretation (PI) KeySource imagery is county imagery flown primarily by FDOT, at varying dates. The 2020 map used the below dates of capture for the various counties: Year Flight Season Counties2020 Dec. 2019 - Mar. 2020 Alachua, Baker, Clay, Duval, Flagler, Lake, Marion, Osceola, Polk, Putnam2021 Dec. 2020 - Mar. 2021 Brevard, Indian River, Nassau, Okeechobee, Orange, St. Johns, Seminole, Volusia2022 Dec. 2021 - March 2022 Bradford, UnionThe 2020 data is mapped to the extent of the previous 2014 dataset as far as available imagery allowed.IMAGERY NOTE: Security restrictions in effect during the COVID 19 epidemic prohibited aerial imagery capture over the easternmost portion of Brevard County (USGS Quarter Quads 3705 (False Cape) and 3606 NE (Cape Canaveral). A private contractor has this area in his project plan, but as of June 2024 imagery is not yet available. Land cover data in this area has not been updated. CODING NOTE: The requirement for the Land Use Class 1180 Rural Residential to have a separate Land Cover code was eliminated, and the class was revised to reflect the PI Key description as a Land Use class. It was noted during this update that this 1180 class was misapplied in many cases in the previous update as far as both areal extent and size. The PI Key describes this class in part as "not intended to be applied to small patchy features in the landscape." Many polygons were either merged together, or where appropriate, merged into adjacent low density residential areas. This update continues the District's historical practice of mapping the portion of Ocklawaha River Basin in Polk County that was transferred to the Southwest Florida Water Management District.

Land cover and land use in the St. Johns River Water Management District based on 2013-2016 digital orthophotography. This layer is a copy of the 2009 lulc dataset, with updates based on conditions in the 2013-2016 orthophotography. The previous Photointerpretation Key was also revised and updated for this project.Source imagery is county imagery flown primarily by FDOT, at varying dates . The 2014 map used the below imagery:Year Flight Season Counties2013 (Dec 2012 –Mar 2013) Duval2014 (Dec 2013 –Mar 2014) Alachua, Baker, Bradford, Clay, Flagler, Lake, Marion, Nassau, Osceola, Polk, Putnam, St. Johns2015 (Dec 2014 –Mar 2015) Brevard, Indian River, Okeechobee, Seminole, Volusia2016 (Dec 2015 –Mar 2016) OrangeNOTE: Mapping convention made for Marion/Alachua counties. Imagery Dates: Alachua - December 2013 - January 2014; Marion - March 2014 -April 2014. Implications for land cover mapping: We experienced a wetter than average winter, and significant rain fell between Alachua and Marion flight dates. Orange Lake looked very different in areas where the two county imagery datasets overlapped (higher water levels in Marion imagery). We decided on the following mapping convention: always map according to the Marion imagery where it exists.The 2014 data is mapped to the extent of the previous update in 2009 as far as available imagery allowed. There is data to the east of Nassau County (outside our District and Water Basin boundaries) where no imagery was available. The 2014 data extends beyond its previous limit in a few small areas to fulfill an internal staff request.It continues the historical practice of mapping the portion of the Ocklawaha River Basin in Polk County that was transferred to the Southwest Florida Water Management District.NOTE: June 2018 Changes to Dataset:The 2014 dataset was modified in June 2018 based on results from an Accuracy Assessment, These edits changed net acreage counts for some classes as follows:ACREAGE INCREASES: Class 3300 +2.77 ac / Class 4200 +5.12 ac / Class 5200 +7,254.66 ac / Class 5300 +174,082.38 ac / Class 8350 +122.27 acACREAGE DECREASES: Class 1750 -16.64 ac / Class 2110 -100.00 ac / Class 4110 -3.63 ac / Class 4210 -2.00 ac / Class 5100 -181,337.04 / Class 7400 -7.90 ac