Survey of Point Beach, Wisconsin, August 2020

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Lake Michigan experiences quasi-decadal fluctuations between high and low water levels, resulting in variable impacts to navigation and tourism, as well as changes in shoreline position and coastal habitat extent. Recent high water levels are a concern for homeowners and policy-makers due to significant shoreline recession. Nearshore waves, currents and bathymetry are major factors influencing local sediment transport and shoreline behavior, but rigorous models of these processes are largely absent for Lake Michigan and frequent “real-time” surveying can be cost prohibitive for small communities. As such, there have been few attempts to quantitatively estimate potential rates and extents of wave-driven erosion and nearshore sediment transport at sandy coastal systems in the Great Lakes, particularly related to fluctuations in lake level. In this study we numerically model nearshore sediment transport and resulting changes in sandy beach and nearshore morphology in order to estimate future coastal geomorphic change in response to storms and varying lake levels.

opentopoID: OTDS.062021.32616.2
DOI: https://doi.org/10.5069/G9X63K4B
Platform: Structure from Motion / Photogrammetry
Data Format: Point Cloud, Raster
Dataset Acknowledgement: This project funded by the Wisconsin Geologic Survey and UW Madison Geosciences.
This dataset included in a thesis for partial completion of a Master’s degree from University Wisconsin, Madison WI (Volpano 2021)
Dataset Citation: Volpano, C. (2021). Survey of Point Beach, Wisconsin, August 2020. Distributed by OpenTopography. https://doi.org/10.5069/G9X63K4B. Accessed: 2024-04-18
Survey Date: 08/12/2020
Survey Area: 0.17 km2
Publication Date: 06/16/2021
Number of lidar returns: 117,319,408 pts
Point Density: 697.96 pts/m2
Coordinates System:
Horizontal: WGS 84 / UTM zone 16N [EPSG: 32616]
Vertical: NAVD88 [EPSG: 5703]

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Spatial Extent
Point Cloud Extent Raster Extent

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    Point Cloud Data
  File Name Size Points Area (m2) Density  
1     PBSF_08122020.laz     1.06 GB     117,319,408     168,089     697.96         View Detail    
  SpatialReference:
COMPD_CS["unknown",PROJCS["WGS 84 / UTM zone 16N",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433],AUTHORITY["EPSG","4326"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-87],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","32616"]],VERT_CS["unknown",VERT_DATUM["unknown",2005],UNIT["metre",1.0,AUTHORITY["EPSG","9001"]],AXIS["Up",UP]]]
Lat/Lon/Elevation Boundary:
North-East (lat,lon,elev): [44.21383999, -87.50668642, 201.303]
South-West (lat,lon,elev): [44.20399808, -87.51041148, 154.983]
Coordinates Boundary:
North-East (X,Y): 459516.309, 4895748.874]
South-West (X,Y): 459225.449, 4894657.471]
Classifications:
Class 0 (Created, never classified):     117,319,408
    Raster Data
  File Name Size Resolution Dimensions Layer Type  
1     PBSF_08122020_10cmDEM.tif     123.64 MB     0.1 meter     2909 x 10914                 View Detail    
  SpatialReference:
PROJCS["WGS_1984_UTM_Zone_16N", GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4326"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",-87], PARAMETER["scale_factor",0.9996], PARAMETER["false_easting",500000], PARAMETER["false_northing",0], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AUTHORITY["EPSG","32616"]]
Lat/Lon Boundary:
North-East (lat,lon) [44.21383996904015, -87.50677016591528]
South-West (lat,lon) [44.20399807824243, -87.51032663151832]
Coordinates Boundary:
North-East (X,Y) [459516.349, 4895748.871]
South-West (X,Y) [459225.449, 4894657.471]
2     PBSF08122020_ortho.tif     906.61 MB     0 meter     13081 x 53306                 View Detail    
  SpatialReference:
GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]], TOWGS84[0,0,0,0,0,0,0], AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433], AUTHORITY["EPSG","4326"]]
Lat/Lon Boundary:
North-East (lat,lon) [44.2138442, -87.5068549]
South-West (lat,lon) [44.2039643, -87.5102256]
Coordinates Boundary:
North-East (X,Y) [-87.5068549, 44.2138442]
South-West (X,Y) [-87.5102256, 44.2039643]
  Summary 1.01 GB            
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