ocs_evs_merge_mhw

Metadata also available as

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS), Coast Survey Development Laboratory (CSDL), Cartographic & Geospatial Technology Program (CGTP)

Publication_Date: 200401

Title: ocs_evs_merge_mhw

Edition: First

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Extracted Vector Shoreline Series
Issue_Identification: kapp number

Publication_Information:

Publication_Place: Silver Spring
Publisher: NOAA's Ocean Service, Office of Coast Survey (OCS)

Online_Linkage: <http://nauticalcharts.noaa.gov/csdl/ctp/cm_vs.htm>

Description:

Abstract:: The Merged Extracted Vector Shoreline file was created from the Coast Survey Development Laboratory, Cartographic & Geospatial Technology Program (CGTP) previous Extracted Vector Shoreline (EVS) project. The original EVS project created individual charted shoreline files in ESRI Shapefile format extracted from NOAA nautical charts using CGTP created processes and software. The project extracted both the Mean Lower Low Water and the Mean High Water Line from the nautical charts at a target scale of 1:20,000. The Merged Extracted Vector Shoreline file provides users of EVS a topologically clean, merged EVS set in ESRI Shapefile format depicting the best scale available Mean High Water line for the contiguous United States, Alaska, the Hawaiian Islands and U.S territories.
Purpose:: The data is intended for use as a vector query tool that represents the charted shoreline of the United States, Alaska, the Hawaiian Islands and U.S. territories. Vector shoreline data are beneficial in many GIS applications. Coastal zone managers need shoreline data for response to natural and manmade disasters, in environmental decision making, and for boundary purposes. Internally, the National Geodetic Survey (NGS) Remote Sensing Division and the Office of Coast Survey (OCS) Hydrographic Surveys Division use the vector data for change analysis. Since the NOS nautical charts contain shoreline in raster format these data are needed to clip and query from in a GIS environment. To ensure a match to charted shoreline, that data set is derived from the nautical chart. The purpose of the Merged EVS is to provide users a topologically clean, merged EVS product depicting the best scale Mean High Water line for the contiguous United States. The previous EVS project required users to obtain multiple overlapping EVS files at varying scales to cover an area of interest. The merged EVS product allows users to obtain a single file at the best scale possible.
Supplemental_Information:: The data is intended for use as a tool for GIS analysis. It is in no way intended for navigational uses or to be used as the legal shoreline. The data accuracy is checked against its source nautical chart only. NOAA assumes no liability for use of this data.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.

Range_of_Dates/Times:

Beginning_Date: 200110
Ending_Date: 200401

Currentness_Reference: publication date

Status:

Progress: In work
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -179.012678
East_Bounding_Coordinate: 179.355327
North_Bounding_Coordinate: 71.591408
South_Bounding_Coordinate: -14.548849

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Vector Shoreline
Theme_Keyword: Geographic Information Systems
Theme_Keyword: Topology
Theme_Keyword: Shapefile
Theme_Keyword: NOAA Nautical Chart
Theme_Keyword: Aerial Photography and Shoreline Mapping
Theme_Keyword: Oceans
Theme_Keyword: Mean High Water

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: U.S. Exclusive Economic Zone
Place_Keyword: U.S. Territories
Place_Keyword: U.S. Waters
Place_Keyword: Coast

Access_Constraints: none

Use_Constraints:

The data is intended for use as a tool for GIS analysis. It is in no way intended for navigational uses or to be used as the legal shoreline. The data accuracy is checked against its source nautical chart only. NOAA assumes no liability for use of this data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS), Coast Survey Development Laboratory (CSDL)

Contact_Position: Cartographic and Geospatial Technology Program

Contact_Address:

Address_Type: mailing and physical address
Address: 1315 East West Highway, N/CS12
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: U.S.A

Contact_Voice_Telephone: (301)713-2645 x143

Contact_Electronic_Mail_Address: matthew.austin@noaa.gov

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722

Cross_Reference:

Citation_Information:

Originator:

National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS),Coast Survey Development Laboratory (CSDL), Cartographic & Geospatial Technology Program (CGTP)

Publication_Date: 200110-200310

Title: Extracted Vector Shoreline

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Extracted Vector Shoreline Series
Issue_Identification: kapp number

Publication_Information:

Publication_Place: Silver Spring, MD
Publisher: NOAA's Ocean Service, Office of Coast Survey (OCS)

Online_Linkage: <http://nauticalcharts.noaa.gov/csdl/ctp/cm_vs.htm>

Cross_Reference:

Citation_Information:

Originator:

National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS),Coast Survey Development Laboratory (CSDL), Cartographic & Geospatial Technology Program (CGTP)

Publication_Date: 200110-200310

Title: Coastal Map

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name: Coastal Map Series
Issue_Identification: kapp number

Publication_Information:

Publication_Place: Silver Spring, MD
Publisher: NOAA's Ocean Service, Office of Coast Survey

Online_Linkage: <http://nauticalcharts.noaa.gov/csdl/ctp/cm_vs.htm>

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: The data accuracy is checked against its source nautical chart only. Prior to 1995, the paper charts were composed manually. In 1995, the paper charts were scanned to create the raster charts. Both the paper and raster charts are composed from the same digital files. This vector data is extracted from those raster set containing all the errors and cartographic interpretations found in the raster nautical chart.

Logical_Consistency_Report:

The projection of the source data set has been altered to non-projected geographic positions. The data set contains topology and has been corrected for spatial relationships between charts using ESRI ArcGIS 8.3 topology tools. While topology is good, lines may not always intersect where intended. Non charted line segments exist to facilitate a seamless topology where necessary. No duplicate lines exist.

Completeness_Report:

A complete list of selection criteria, generalization, and definitions used to determine what is included in the data set are completely outlined in the NOAA Nautical Chart Manual Seventh (1992) Edition. On a 1:40,000 scale chart, a feature could have a potential error of 40 to 80 meters (about 130-160 feet) due to scale alone. This is often the cause of the "ship on the pier" situation, where the vessel tied up at the pier appears on the navigation system to be on the pier rather than alongside. Another source of this type of discrepancy is that symbols on a chart of a given scale may be a representation for multiple real features that are too close together to be shown at chart scale. Similarly, symbols may be displaced from their original location for legibility and presentation. The NOAA Nautical Chart Manual has an extensive description of the horizontal datum.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: Nautical charts are updated as part of an ongoing process to create a cartographic representation of the best available data collected through the years employing a variety of data collection technology and techniques and provided to the Office of Coast Survey using numerous different scales, datums, and projections. As technology has allowed for a drastic increase in positional accuracy historical data has not been superseded for many areas. The availability of digital chart products and Differential Global Positioning System (DGPS) has drastically changed navigation. Navigation systems using DGPS for locating a vessel's position on the earth have put mariners in a unique predicament due to a false perception of greater positional accuracy of features portrayed on the charts. In many cases, the DGPS is more accurate than the surveying technology that was used to put the soundings and features on the nautical chart, paper or raster. The data accuracy is checked against its source nautical chart only. It is in no way intended for navigational uses or to be used as the legal shoreline. The data accuracy is checked against its source nautical chart only. NOAA assumes no liability for use of this data.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:: Depths are biased for shoals. Charts use multiple vertical datums (Mean Higher High Water [MHHW]; Mean High Water [MHW]; Mean Sea Level [MSL]; Mean Low Water [MLW]; Low Water Datum [LWD]; Mean Lower Low Water [MLLW]; Gulf Coast Low Water Datum [GCLWD].) The NOAA Nautical chart manual has an extensive description of the vertical datum used. Sounding datums used in coastal areas for nautical charting are determined by local observations, ideally over a period of 19 years. The official time period over which tide observations are taken to obtain mean values for tidal datums has been standardized by NOS. The present National Tidal Datum Epoch is from 1960 through 1978. There have been two epochs used previously this century; 1924 through 1942, and 1941 through 1959. The individual chart title block documents the datum used for that chart. Nautical charts are updated as part of an ongoing process to create a cartographic representation of the best available data collected through the years employing a variety of data collection technology and techniques. As technology has allowed for a drastic increase in survey accuracy historical data has not been superseded for many areas. Therefore, soundings found on a single chart may contain multiple collection dates and be only accurate as the technology used to collect them allowed. The data accuracy is checked against its source nautical chart only. NOAA assumes no liability for use of this data.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Publication_Date: 200110-200310

Title: Extracted Vector Shoreline

Edition: First

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Vector Shoreline Series
Issue_Identification: kapp number

Publication_Information:

Publication_Place: Silver Spring, MD
Publisher: NOAA's Ocean Service, Office of Coast Survey (OCS)

Online_Linkage: <http://nauticalcharts.noaa.gov/csdl/ctp/cm_vs.htm>

Source_Scale_Denominator: 2,500 to 3,121,170

Type_of_Source_Media: Vector digital data

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 200110
Ending_Date: 200401

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Extracted Vector Shoreline

Source_Contribution:

Merged set created from individual EVS files extracted from Nautical Charts

Source_Information:

Source_Citation:

Citation_Information:

Originator:

National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS), Marine Carting Division (MCD)

Publication_Date: 19950101

Title: Nautical Chart

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: Nautical Charts
Issue_Identification: kapp number

Publication_Information:

Publication_Place: Silver Spring, MD
Publisher: NOAA's Ocean Service, Office of Coast Survey

Online_Linkage: <http://nauticalcharts.noaa.gov/csdl/ctp/cm_vs.htm>

Source_Scale_Denominator: 2,500 to 3,121,170

Type_of_Source_Media: Raster digital data

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19950101
Ending_Date: Present

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Source Nautical Chart

Source_Contribution: Vector shoreline was extracted form source nautical chart

Process_Step:

Process_Description:

Charted shoreline is extracted from the nautical charts using a process and software developed by Cartographic & Geospatial Technology Program (CGTP). The product is easy to update. Because of the automation in the shoreline extraction process, shoreline for a single chart can be created, quality controlled, and provided to users in just a few hours. Hence, it is a simple task to update the shoreline for a specific chart when a new topographic survey is applied to the next edition nautical chart. CGTP began developing and perfecting the automated system of charted shoreline extraction using MicroStation and ArcView. The program extracts both the Mean Lower Low Water and Mean High Water Line from the nautical charts. Next the lines are manually inspected for quality using the raster nautical chart, and modifications are made, if necessary. Those lines are then converted from the paper-charted units to geographic positions and imported to the ArcView Shape file format. Another quality-control inspection is made on the final files using the original raster nautical chart.

Source_Used_Citation_Abbreviation: Source Nautical Chart

Process_Date: 20010801 to 20040101

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS), Coast Survey Development Laboratory (CSDL)

Contact_Position: Chief, Cartographic and Geospatial Technology Program

Contact_Address:

Address_Type: mailing and physical address
Address: 1315 East West Highway, N/CS12
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: U.S.A

Contact_Voice_Telephone: (301)713-2645 x143

Contact_Electronic_Mail_Address: matthew.austin@noaa.gov

Process_Step:

Process_Description:

Using processes and steps developed by the Cartographic and Geospatial Technology Program, the Mean High Water Line form individual Vector Shoreline files extracted from nautical charts were cleaned and merged into a single set. The individual vector files were converted to feature classes in a Geodatabase and ERSI ArcInfo 8.3 topology rules were used to ensure topological consistency. Scale followed by date were used as selection criteria for overlapping vector lines. Where lines extracted form different charts did not line up, non charted line segment were generated to produce a seamless shoreline. The non charted line segments can be identified by a 0 or null value in the chart, kapp, date, and edition attribute fields. Once topologically sound the final merged vector shoreline file was converted back to ESRI Shapefile format.

Source_Used_Citation_Abbreviation: Extracted Vector Shoreline

Process_Date: 200305-20040105

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:: National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS), Coast Survey Development Laboratory (CSDL)

Contact_Position:

Chief, Cartographic and Geospatial Technology Program

Contact_Address:

Address_Type: mailing and physical address
Address: 1315 East West Highway, N/CS12
City: Silver Spring
State_or_Province: MD
Postal_Code: 20910
Country: U.S.A

Contact_Voice_Telephone: (301)713-2645 x143

Contact_Electronic_Mail_Address: matthew.austin@noaa.gov

Process_Step:

Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation:: F:\472 NOAA\472Q Little Elk Creek\GIS\LittleElkCreek_ben\Base\shoreline\ocs_vector_shoreline\ocs_evs_merge_metadata.xml

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: The Coastal United States and Territories

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 101865

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.400000
Denominator_of_Flattening_Ratio: 294.978698

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name:: Mean Higher High Water, Mean High Water, Mean Sea Level, Mean Low Water, Low Water Datum, Mean Lower Low Water, Gulf Coast Low Water Datum
Depth_Resolution: 1
Depth_Distance_Units: feet, meters, fathoms
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: ocs_evs_merge_mhw
Entity_Type_Definition:: The line of contact between land and a body of water. On National Ocean Service nautical charts the shoreline approximates the Mean High Water Line
Entity_Type_Definition_Source: NOAA Nautical Chart Manual Seventh (1992)

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI