New Orleans District Army Corps of Engineers20180725AS_12_S2M_20180725_CSVector Digital Data Set (Point)New Orleans LouisianaNew Orleans District Army Corps of Engineershttp://www.mvn.usace.army.mil/Missions/Navigation/ChannelSurveys.aspxSurvey Type: ---Unless otherwise noted---Single Beam Soundings are a first sounding sort at 25 ft. intervals, along transverse lines spaced normal to the channel centerline at irregular intervals.
Horizontal Coordinate System: North American Datum of 1983 (NAD83), projected to the State Plane
Coordinate System (SPCS), Louisiana South Zone. Distance units in U.S. Survey Feet.
Vertical Datum: Soundings are shown in feet and indicate depths below Mean Low Gulf Datum (MLG).
The location of navigation aids are base on and provided by the U.S. Coast Guard.
*** High frequency (200 kHz) survey data represents the first signal return at a sounding
location and will include suspended solids, known as "fluff", if present. Low frequency (24 kHz)
survey data normally penetrates through this "fluff" layer to depict elevations of consoldiated bottom
material. Low frequency accuracies may vary depending on channel conditions and fathometer
settings. Refer to .xyz or .pdf files for information on staff/auto gages used to apply MLG tide reduction.Channel Depth Status, not intended for Navigation20180725publication dateWeekly-91.359640082-91.30220152129.78419111229.754883607Tri - Service Spatial Data StandardCondition SurveyHydro SurveyHydrographicTopographicOrthometricBathymetricSurveySoundingPointGeographic Names Information SystemLouisianaNew OrleansUsers are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations.
The United States Government furnishes these data and the recipient accepts and uses them with the express understanding that the US Government makes no warranties, expressed, or implied concerning the accuracy, completeness, readability, usability or suitability for any particular purpose of the information and the data furnished. The United States shall be under no liability whatsoever to any person by reason of any use made thereof. These data belong to the Government. Therefore the recipient fully agrees not to represent these data to anyone as other
than Government provided data. The recipient may not transfer these data to others without also transferring this Disclaimer.
The information depicted on this map represents the results of a survey conducted on the date indicated and can only be considered to represent the general condition existing at that time.Hydrographic survey data is subject to change rapidly due to several factors including but not limited to dredging activity and natural shoaling and scouring processes. The U. S. Army Corps of Engineers accepts no responsibility for changes in the hydrographical conditions which develop after the date of publication. This data is intended for U. S. Army Corps of Engineers' internal use. Prudent mariners should not rely solely upon it.CEMVN-OD-TRichard EntwisleChief, Channel Survey SectionMailing and Physical7400 Leake AvenueNew OrleansLouisiana70118USA(504) 862-1377(504) 862-2212Richard.C.Entwisle@usace.army.milU. S. Army Corps of Engineers, New Orleans District, Operations Division, Channel Survey SectionEnvironment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.1 (Build 3035) Service Pack 1 (Build 3143)The data represents the results of data collection/processing for a specific US Army Corps of Engineers activity and indicates the general existing conditions. As such, it is only valid for its intended use, content, time and accuracy specifications. The user is responsible for the results
of any of the application of the data for other than its intended purpose.Horizontal_Positional_Accuracy_Explanation: Static Test
Vertical_Accuracy_Explanation: Bar/Ball checkData set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.DGPS, 1 Meter, Static TestExpected values 0.50-1.0 Foot, Bar Checked to 0.1 foot.This data was collected using an Odom MKIII echosounder, associated equipment include Odom sound velocity profiler and Positioning: Trimble SPS852 GPS receiver. Data is edited using Hypack software to exclude erroneous soundings and reduce for tide.20140516PointEntity point2200State Plane Coordinate System 1983360144.333333333346.0-120.543.66666666678202083.333330.0coordinate pair0.010.01Foot_USD_North_American_1983GRS_19806378137.0298.257222101Attribute TableTable containing attribute information associated with the data set.Producer definedxLocationX value of an xyz survey data set in State Plane CoordinatesProducer defined3272488.193290711.7usSurveyFootyLocationY value of an xyz survey data set in State Plane CoordinatesProducer defined456355.26467012.83usSurveyFootsurveyPointElevZ value of an xyz survey data point. The elevation of the survey point.Producer defined-36.4700012207-0.540000021458usSurveyFootZ_depthDepth of sounding point corrected for draft,squat, and chart datumProducer defined0.54000002145836.4700012207usSurveyFootZ_useDepth of sounding point used on chart with adjustment for equipment Total Propagated Error (-0.5)Producer defined0.54000002145836.4700012207usSurveyFootZ_labelCharacter string of Z_use for use on chart as a labelProducer definedDepth of Sounding point rounded and truncated to an integer for display on a chart.SurveyDateStampDate of surveyProducer defined2018-07-25DateProducer definedSurveyIdeHydro Survey location including the date of surveyProducer definedAS_12_S2M_20180725_CSUnique survey ID based on survey location and date of surveyProducer definedsurveyPointIDPKPrimary Key. A unique, user defined identifier for each record or instance of an entity. Number to be added at Enterprise level cross referenced to historical National Channel Framework dataProducer defined{Null Value / Empty Field Entry}Unique ID number to be added at Enterprise levelProducer definedsdsIDThe unique identifier for all features and objects in the SDSFIE added at the Enterprise level Implemented for SDSFIE compliance; reserved for future functionalityProducer definedThe unique identifier for all features and objects in the SDSFIEsdsFeatureNameThe common name of the feature added at the Enterprise level Implemented for SDSFIE compliance; reserved for future functionalityProducer definedThe common name of the featuresdsFeatureDescriptionA description of the feature Implemented for SDSFIE compliance; reserved for future functionalityProducer definedA narrative describing the feature.sdsMetadataIDThe foreign key to a metadata record Implemented for SDSFIE compliance; reserved for future functionalityProducer definedThe foreign key to a metadata recordelevationDatumA code indicating the datum or reference for the elevation.Producer definedMLLWALWP Average Low Water Plane
DHQ Mean Diurnal High Water Inequality - The difference in height of the two high waters of each tidal day for a mixed or semidiurnal tide.
DLQ Mean Diurnal Low Water Inequality - The difference in height of the two low waters of each tidal day for a mixed or semidiurnal tide.
DTL Diurnal Tide Level - The arithmetic mean of mean higher high water and mean lower low water.
GT Great Diurnal Range - The difference in height between mean higher high water and mean lower low water.
HWI Greenwich High Water Interval - The average interval (in hours) between the transit of the moon over the Greenwich meridian and the following high water at a location.
LWI Greenwich Low Water Interval - The average interval (in hours) between the transit of the moon over the Greenwich meridian and the following low water at a location.
LWRP Low Water Reference Plane 1974
MHHW Mean Higher High Water - The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch.
MHW Mean High Water - The average of all the high water heights observed over the National Tidal Datum Epoch.
MLG Mean Low Gulf
MLLW Mean Lower Low Water - The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch.
MLW Mean Low Water - The average of all the low water heights observed over the National Tidal Datum Epoch.
MN Mean Range of Tide - The difference in height between mean high water and mean low water.
MSL Mean Sea Level - The arithmetic mean of hourly heights observed over the National Tidal Datum Epoch. Shorter series are specified in the name; e.g., monthly mean sea level and yearly mean sea level.
MTL Mean Tide Level - The arithmetic mean of mean high water and mean low water.
NA Not applicable.
NAVD_88 North American Vertical Datum of 1988
NGVD_29 National Geodetic Vertical Datum of 1929
NTDE National Tidal Datum Epoch - The specific 19-year period adopted by the National Ocean Service as the official time segment over which tide observations are taken and reduced to obtain mean values (e.g., mean lower low water, etc.) for tidal datums.
OTHER Other. Must be described in the sdsFeatureDescription attribute.
SD Station Datum - A fixed base elevation at a tide station to which all water level measurements are referred. The datum is unique to each station and is established at a lower elevation than the water is ever expected to reach.
TBD To be determined.Producer definedelevationUOMThe unit of measure for the elevation value(s).Producer definedusSurveyFootfathom A conventional unit of measurement of length equal to 6 feet (1.8288 metres).
foot A conventional unit of measurement of length equal to 0.3048 metres.
metre The base unit in SI for the physical quantity length, defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.
NA Not applicable.
TBD To be determined.
usSurveyFoot A conventional unit of measurement of length equal to 0.3048006 metres. Set by the U.S. Coast and Geodetic Survey as exactly 1200/3937 metres.Producer definedmediaIDFKUsed to link the record to associated multimedia records that reference data such as imagery, video, audio, scanned documents, drawings, and other digital media. See your service implementation guidanceProducer definedUsed to link the record to associated multimedia records that reference data such as imagery, video, audio, scanned documents, drawings, and other digital media.sourceTypeAn enumeration of the type of survey source.Producer definedsonarSingleBeamlidar Light detection and ranging.
NA Not applicable.
other Other. Must be described in the sdsFeatureDescription attribute.
sarOrIfsar synthetic aperture radar or interferometric SAR.
sonarMultiBeam underwater echo-ranging equipment that emits multiple directional beams.
sonarSingleBeam underwater echo-ranging equipment that emits a single directional beam.
TBD To be determined.Producer definedsurveyJobIDFKThe foreign key to the related SurveyJob feature.Producer defined{Null Value / Empty Field Entry}UnknownProducer definedxLocationUOMusSurveyFoot, DISR approved units of measure for length.Producer definedusSurveyFootfoot A conventional unit of measurement of length equal to 0.3048 metres.
metre The base unit in SI for the physical quantity length, defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.
nauticalMile A conventional unit of measurement of length equal to 1,852.0 metres.
statuteMile A conventional unit of measurement of length equal to 5,280 feet (1,609.344 metres).
TBD To be determined.
usSurveyFoot A conventional unit of measurement of length equal to 0.3048006 metres. Set by the U.S. Coast and Geodetic Survey as exactly 1200/3937 metres.
usSurveyMile A conventional unit of measurement of length equal to 5,280 U.S. Survey Feet (1,609.347 metres).
yard A conventional unit of measurement of length equal to 0.9144 metres.Producer definedyLocationUOMusSurveyFoot, DISR approved units of measure for length.Producer definedusSurveyFootfoot A conventional unit of measurement of length equal to 0.3048 metres.
metre The base unit in SI for the physical quantity length, defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.
nauticalMile A conventional unit of measurement of length equal to 1,852.0 metres.
statuteMile A conventional unit of measurement of length equal to 5,280 feet (1,609.344 metres).
TBD To be determined.
usSurveyFoot A conventional unit of measurement of length equal to 0.3048006 metres. Set by the U.S. Coast and Geodetic Survey as exactly 1200/3937 metres.
usSurveyMile A conventional unit of measurement of length equal to 5,280 U.S. Survey Feet (1,609.347 metres).
yard A conventional unit of measurement of length equal to 0.9144 metres.Producer definedThe entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set.The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.CEMVN-OD-TRichard EntwisleChief, Channel Survey SectionMailing and Physical7400 Leake AvenueNew OrleansLouisiana70118USA(504) 862-1377(504) 862-2212Richard.C.Entwisle@usace.army.milDistributor assumes no liability for misuse of data.Users must assume responsibility to determine the usability of these data.Vector Digital Data Set (Point)http://www.mvn.usace.army.mil/Missions/Navigation/ChannelSurveys.aspxNone. No fees are applicable for obtaining the data set.20180726Andrew OakmanCEMVN-OD-TCivil Engineer, Channel Survey FunctionMailing and Physical7400 Leak AvenueNew OrleansLouisiana70118USA(504) 862-2054(504) 862-2212Andrew.T.Oakman@usace.army.milFGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998