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The bar check involves suspending a 2-ft-diameter flat aluminum plate directly below the echo sounder. This was done to ensure that the echo sounder was calibrated correctly. Army Corps of Engineers, 1994, Engineering and design: Hydrographic survey EM 03, chap. Position (easting and northing) and depth units were collected in feet.Ī bar check calibration on the echo sounder was performed at the start of each day following established protocols (U.S. In Hypack Max, the geodetic parameters were set to UTM north, Zone 15, and ellipsoid GRS-1980. 2.12a) (Hydrographic Survey Software, User's Manual, Hypack Max, Coastal Oceanographics, Inc., Middlefield, Conn.).
#HYPACK GPS ECHO SOUNDER SET UP SOFTWARE#
Bathymetry data were collected and stored in Hypack Max software (ver. The differential GPS has a horizontal accuracy of less than 1 meter (3.281 ft). Lineage: Source_Information: Source_Citation: Citation_Information: Type_of_Source_Media: computer program Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Source_Currentness_Reference: ground condition Process_Step: Process_Description:ĭata collection: Bathymetry data were collected using the Bathymetric Survey System (BSS+5) with a 200-kHZ intelligent depth sounder (IDS) and a differential GPS (Novatel DGPS beacon or omnistar receiver) (Specialty Devices, Inc., 2003, Bathymetric Survey System BSS+5 with omnistar manual: Specialty Devices, Inc., Plano, Texas, 38 p.). Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report:Īccuracy is tested by visual comparison of source with digital data on an interactive computer system. Data were weeded from 137,477 to 14,134 data points and used for input into a TIN model. Data were weeded in the data-collection software, Hypack Max, prior to generation of this coverage. Data were weeded in the data collection software, Hypack Max, prior to generation of this coverage. Point coverage of weeded bathymetry data points collected along transects and perimeter using the 200-KHz transducer.
#HYPACK GPS ECHO SOUNDER SET UP WINDOWS#
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2 ESRI ArcCatalog 9.1.0.722ĭata_Quality_Information: Completeness_Report: Geological Survey Contact_Person: Greg Nalley Contact_Position: Project Chief - Eastern Field Unit Supervisory Hydrologist Contact_Voice_Telephone: 31 Contact_Facsimile_Telephone: 31 Contact_Electronic_Mail_Address: Native_Data_Set_Environment: Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. The data are released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -91.575280 East_Bounding_Coordinate: -91.529049 North_Bounding_Coordinate: 41.810566 South_Bounding_Coordinate: 41.787637 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Lakes Theme_Keyword: Bathymetry Theme_Keyword: Inland Waters Theme_Keyword: Hydrology Theme_Keyword: USGS Place: Place_Keyword: Iowa Access_Constraints: This point coverage (among other coverages) was then used to generate a three-dimensional surface representing the lake-bottom elevation. Geological Survey to be used with the Lake Bathymetric project, Eastern Field Unit, Iowa City, Iowa.ĭata collected during the bathymetric survey were input into a geographic information system (GIS) software package, ArcInfo, to create a point coverage representing discrete point locations. This digital, geographically referenced data set was developed by the U.S. Geological Survey conducted a bathymetric survey of Lake Macbride in 2003. Point coverage of bathymetry data for Lake Macbride in Johnson Co., Iowa. Geological Survey Online_Linkage: None Description: Abstract: Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Scientific Investigations Map 2933-C Publication_Information: Publisher: U.S. Geological Survey, Iowa Water Science Center, Eastern Iowa Field Unit, Iowa City, Iowa Identification_Information: Citation: Citation_Information: Originator: Geological Survey Scientific Investigations Map 2933 Prepared in cooperation with the Iowa Department of Natural Resources Bathymetric Contour Maps for Lakes Surveyed in Iowa in 2003 Data-Collection Points Along Transects and Around Perimeter at Lake Macbride, Johnson County, Iowa