Title of Dataset: Maps of wind-wave height on Minnesota lake shorelines Date of data collection: 2017-2018 Geographic location of data collection: Minnesota lakes Spatial reference: NAD83 / UTM zone 15N -- EPSG: 26915 Description: These shapefiles map out estimated wave height and energy parameters for each series of points around the shoreline of 460 lakes in Minnesota. The various files give annual (Annual_WaveStats.shp) and monthly (e.g. April_WaveStats.shp) wave statistics. The Study_Lakes shape file gives the polygons for all 460 study lakes, derived from the following Minnesota DNR hydrography layer (water_dnr_hydrography.gdb\dnr_hydro_features_all): DNR Division of Fish & Wildlife - Fisheries Unit (09/20/2012). DNR Hydrography - All Water Features. State of Minnesota. https://gisdata.mn.gov/dataset/water-dnr-hydrography Metadata describing field names is available from: https://resources.gisdata.mn.gov/pub/gdrs/data/pub/us_mn_state_dnr/water_dnr_hydrography/metadata/dnr_hydrography_all_water_features.html Methodology: Details on how these wave data were calculated can be found the Univerisity of Minnesota St. Anthony Falls Project Report #598, "Quantifying Wave Energy on Minnesota Lakes", authored by William Herb, Ben Janke, Heinz Stefan, Meijun Cai, and Lucinda Johnson. https://hdl.handle.net/11299/226012 Author contact: Questions on these data may be directed to William Herb (herb0003@umn.ed). Wave Parameter Description Lake: Minnesota Department of Natural Resources Department of Waters Lake Number Point: Sequential point number for each lake Month: Month number UTM_x: Universal Transverse Mercator Easting (Zone 15N) coordinate of the lakeshore point UTM_y: Universal Transverse Mercator Northing (Zone 15N) coordinate of the lakeshore point ndays: Number of ice free days Hsig: Significant wave height (meters) Hmean: Mean wave height (meters) Thresh5: Number of days that the significant wave height exceeds 0.05 meters Thresh10: Number of days that the significant wave height exceeds 0.10 meters Thresh15: Number of days that the significant wave height exceeds 0.15 meters Pcnt50: 50th percentile wave height Pcnt75: 75th percentile wave height Pcnt90: 90th percentile wave height Pcnt95: 95th percentile wave height Ave_Fetch: Average open water distance (fetch) for all wind directions Max_Fetch: Maximum open water distance (fetch) for any wind direction Energy: cumulative wave energy (megajoules)