|
Tampa
Bay Research Diagrams and Slides
|
|
Tampa
Bay Research Diagrams and Slides
|
| Water Surface Data | 
Tampa Bay GPS Stations by Kevin Cheng, OSU |
 |
| System
Design |
Data Systems Architecture |
NOAA BathymetryThe best available bathymetry was extracted from GEODAS. Soundings were converted from multiple vertical chart datums to the ellipsoid using a new tool developed at NGS called VDatum. Soundings from 47 hydrographic surveys conducted from 1945-1996 were employed. About 800,000 soundings were selected and clipped from the original surveys by a spatial-temporal index. The indexes were used to filter bathymetry to create a temporal and seamless view of bathymerty for Tampa Bay.Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
NOAA BathymetryThe Bathymetry was processed into four vertical datums. Original soundings were converted to a common tidal datum (MLLW) and then transformed to the ellipsoid (NAD83(86)). After a DEM was built, the data was converted to NAVD88. Soundings are available in the (1) original datum, (2) MLLW, (3) NAD83(86),and (4) NAVD88. Soundings are available in shapefile format, geographic projection and NAD83.Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
USGS Digital Elevation DataThe best available digital elevation data was extracted from the USGS National Elevation Dataset (NED). Elevation values were selected and converted to the ellipsoid and registered with VERTCON and GEOID 99.Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
Raster Nautical ChartsRaster Nautical Charts were employed as a base layer for Marine GIS work. Charts were reprojected to a geographic projection, so that the position and sounding values on nautical charts could be compared to the GRIDDED soundings. Charts are available in a geographic projection and a .kap format.Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
Hydrographic Survey TransectsRecent NOAA soundings (1999) came from a vertical-beam echosounder that records depths to the nearest decimeter. The survey data is not compensated for vessel heave, roll, or pitch (no attitude data available). The seafloor ellipsoidal heights are accurate to around 0.5 meter. Soundings are available in a shapefile format.Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
Bathy/Topo Merged DEMNOAA/USGS digital Elevation ModelA merged Topo/Bathy GRID was produced at a 1-arc-second and one-third arc-second resolution. High resolution grids were created from the exact same source data as the 1-arc-second grids. For topo this means that the original DEM was just overstamped to fit the higher resolution. On the bathy side, in some areas the density of the soundings actually supports the higher resolution grid spacing, so the interpolated grid will show some improved bathemetric detail in those areas. In areas where the density is sparse, there's just more cells based on the fewer points available for interpolation. Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
Tampa Bay Bathymetry Showing ChannelSource: Tampa Bay Bathy/Topo/Shoreline Demonstration Project -- NOAA National Ocean Service Office of Coast SurveyWebsite: http://chartmaker.ncd.noaa.gov/bathytopo/ |
 |
Digital Shoreline from NOAA T-SheetsUSGS Tampa Bay Bathy/Topo/Shoreline Demonstration ProjectThe best avalable NOAA shoreline data was employed to delineate shoreline boundary and temporal processing of nearshore bathymetry. Shoreline data is available in shapefile format with FGDC-compliant metadata. Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
.jpg) |
Digital Internal ShorelineUSGS Tampa Bay Bathy/Topo/USGS Tampa Bay Bathy/Topo/Shoreline Demonstration ProjectSource: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
NOAA Hydrographic Surveys for Tampa BaySpatial Survey IndexesFourty-seven NOAA hydrographic survey indexes were constructed into polygons, imported into a GIS. Polygons were sorted by date, merged with other survey polygons, and edited and cleaned. As a result, 15 master spatial-temporal indexes were produced showing the spatial extent of the most current bathymetry in Tampa Bay. The master polygons were then used to select soundings from the original NOAA hydrographic surveys using an inside/outside polygon clipping routine. Source: Tampa Bay Bathy/Topo/Shoreline
Demonstration Project -- NOAA National Ocean Service Office
of Coast Survey
|
 |
NOS Hydrographic Survey DataSource: http://chartmaker.ncd.noaa.gov/bathytopo/spatial/spatialdata.html |
 |
