Arlington County: Shoreline Structures 2018

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
Jessica Hendricks, Comprehensive Coastal Inventory, Center for Coastal Resources Management, Virginia Insitute of Marine Science (VIMS), Scientist
Publication_Date: 20181219
Title: Arlington County: Shoreline Structures 2018
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
Shoreline Situation Reports (SSR) were first generated by VIMS in the 1970s to report the condition and status of the shore lands. The SSR series were published in hardcopy on a county by county basis for each of the Tidewater Virginia localities. The reports were intended to assist planners, managers, and regulators in decisions pertaining to management of coastal areas and natural resources therein. This report continues the process which updates and expands earlier reports. Data collected describes conditions in the immediate riparian zone, the bank, and along the shore.
Purpose: To inventory Virginia's tidal shoreline conditions.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Ending_Date: 20181221
Currentness_Reference: Ground condition at time of imagery.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.081452
East_Bounding_Coordinate: -77.030670
North_Bounding_Coordinate: 38.875845
South_Bounding_Coordinate: 38.838517
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword:
Land use, Land cover, Shoreline conditions, Shoreline structures, Hardened structures, Access structures, Riparian land use, Shoreline inventory
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: farming
Theme_Keyword: boundaries
Theme_Keyword: elevation
Theme_Keyword: environment
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: inlandWaters
Theme_Keyword: location
Theme_Keyword: structure
Access_Constraints: None
Use_Constraints:
These data should not be used for jurisdictional permit determinations beyond providing general shoreline condition or status information. These data have not been surveyed to property boundaries.The Comprehensive Coastal Inventory Program (CCI) at VIMS performs a service by distributing data generated by either CCI or public agencies which offer data without restriction or charge. CCI assumes no responsibility for data accuracy or precision, metadata completeness or correctness for digital information. CCI assumes no liability for misuse of any data which may arise as a result of any alteration, conversion, or combination with other data sources. As well, the timeliness and scale of these products must be considered when evaluating appropriate use.
Native_Data_Set_Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270
Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
A shoreline for Arlington County was created using 2017 Virginia Base Mapping Program (VBMP) imagery at a scale of 1:1000 as a backdrop and using ArcGIS version 10.4. Using this as a baseline, the shoreline inventory was remotely generated using two sources: Google Earth 2015 imagery and 2013 high resolution imagery available through Bing Maps.
Process_Date: 20180125
Process_Step:
Process_Description:
All processing steps for the shoreline inventory were generated using ArcGIS - ArcMap v10.4 while viewing conditions observed in 2015 Bing high resolution oblique imagery and 2017 imagery from the Virginia Base Mapping Program (VBMP). Using the latest VBMP 2017 imagery as a background, conditions visible on shore were used to code a digital shoreline, created at a scale of 1:1000. Conditions were verified using Bing Birds Eye and VBMP 2009 imagery. For the land use/bank cover shapefile, arcs were split and coded for land use, bank height, bank cover, tree fringe, and presence or absence of spit. For the beaches shapefile, arcs were coded for the presence or absence of a beach. For the access structure shapefile, points were placed where structures (dock, dilapidated dock, boathouse, public ramp, and private ramp) are located on the shoreline. For the shoreline structure shapefile, arcs were coded for bulkhead, delapidated bulkhead, riprap, unconventional, debris, wharf, breakwater, groinfield, jetty, marsh toe revetment, and marina >50 slips and <50 slips.
Process_Date: 20180222
Process_Step:
Process_Description:
The first and second step in the QAQC process involves complete checks of shoreline coding by a GIS Programmer/Analyst and a Marine Scientist.
Process_Date: 20180404
Spatial_Data_Organization_Information:
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: 29
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD 1983 UTM Zone 18N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -75.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000002220024164500956
Ordinate_Resolution: 0.000000002220024164500956
Planar_Distance_Units: meter
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Arlington_sstru_2018
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Id
Attribute:
Attribute_Label: Structure
Attribute_Definition:
Erosion control conditions at the shoreline: breakwater, bulkhead, dilapidated bulkhead, debris, groinfield, jetty, marina >50 slips, marina <50 slips, marsh toe revetment, riprap, unconventional, and wharf.
Attribute_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Bulkhead
Enumerated_Domain_Value_Definition:
Bulkheads, traditionally, are treated wood or steel “walls” constructed to offer protection from wave attack. More recently, plastics are being used in construction. Bulkheads are vertical structures built slightly seaward of the problem area and backfilled with suitable fill material. They function like a retaining wall, as they are designed to retain upland soil and prevent erosion of the bank from impinging waves.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Breakwater
Enumerated_Domain_Value_Definition:
Breakwaters are structures that sit offshore and generally occur in a parallel series along the shore. Some breakwaters are attached to the land, referred to as headland breakwaters. Their purpose is to attenuate and deflect incoming wave energy, protecting the fastland behind and between the structures.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Debris
Enumerated_Domain_Value_Definition:
Debris represents nonconforming materials and rubble dumped along the shoreline in a haphazard manner. Debris can include tires, bricks, broken concrete rubble, and railroad ties. The inventory maps Unconventional instead of Debris when the material is deliberately placed for shoreline protection in a manner similar to riprap, bulkhead, and other shoreline protection structures.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Dilapidated Bulkhead
Enumerated_Domain_Value_Definition:
A bulkhead which has failed due to deterioration from age or storm damage is called a dilapidated bulkhead. In many cases the structure may not be able to perform erosion control functions any longer.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Groinfield
Enumerated_Domain_Value_Definition:
Groins are low profile structures that sit perpendicular to the shore. They can be constructed of rock, timber, or concrete. They are frequently set in a series known as a groinfield, which may extend along a stretch of shoreline for some distance. Unless only a single groin can be detected, this inventory does not delineate individual groins in a groinfield. The groinfield is mapped as one linear feature parallel to the shoreline running along the length of the groin series. When effective, groins will trap sediment moving alongshore.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Jetty
Enumerated_Domain_Value_Definition:
A jetty is a structure, generally constructed of stone, which is perpendicular to the shoreline and generally located at the entrance of tidal creeks, tributaries, and marina boat basins. The function of a jetty is to prevent sediment transported alongshore from accumulating in the inlet.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Marinas: < 50 slips and > 50 slips
Enumerated_Domain_Value_Definition:
Marinas are denoted as line features in this survey. The infrastructure associated with the marina (e.g. bulkheading, docks, wharfs, etc) are not digitized individually; however, if a boat ramp is present, it will be surveyed separately and coded as a private ramp. Marinas are generally commercial operations; however, smaller scale community docks offering slips and launches for residences are becoming more popular. To distinguish these facilities from commercial marinas, the user could check the riparian land use delineation. If “residential”, the marina is most likely a community facility. The survey estimates the number of slips within the marina and classifies marinas as those with less than 50 slips and those with more than 50 slips.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Marsh Toe Revetment
Enumerated_Domain_Value_Definition:
(aka Marsh sill) – A low revetment placed offshore from an existing marsh or new planted marsh is classified as marsh toe revetment. The structure may include tidal openings to allow for the easy exchange of free swimming organisms during tidal cycles. Marsh toe revetments are mapped as offshore linear features running along the length of the structure. Marsh toe revetments are distinguished from breakwaters by the linear placement and presence of a tidal marsh instead of a sand beach landward from the structure. The classification can include best professional judgment.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Riprap
Enumerated_Domain_Value_Definition:
(aka Revetments) - Sloped structures constructed with large, heavy stone or other materials placed against the upland bank for erosion protection. Riprap is mapped as a linear feature along the shoreline. Riprap is also used next to failing bulkheads (bulkhead toe revetments). The inventory maps only riprap when this type of structure is co-located with bulkheads. A similar structure is used to protect the edge of eroding marshes, which is mapped as marsh toe revetment, not riprap.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Unconventional
Enumerated_Domain_Value_Definition:
Unconventional features represent segments along the shore where alternative material has been deliberately placed for shoreline protection. Unconventional features may include unique materials placed in a similar manner as riprap or bulkheads, such as engineered pre-cast concrete products. It may also include unique placement or arrangement of conventional materials like riprap that does not fit other structure definitions. The inventory maps "debris" instead of "unconventional" when the material is haphazardly scattered and not providing any shoreline protection.
Enumerated_Domain:
Enumerated_Domain_Value_Definition_Source:
Glossary of Shoreline Features Defined, Center for Coastal Resources Management, VIMS
Enumerated_Domain_Value: Wharf
Enumerated_Domain_Value_Definition:
A wharf is typically described a shore parallel structure where boats are tied. In this inventory, wharfs are generally associated with large industrial, public or commercial facilities.
Attribute:
Attribute_Label: Inventory
Metadata_Reference_Information:
Metadata_Date: 20190108
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Comprehensive Coastal Inventory, Center for Coastal Resources Management, Virginia Insitute of Marine Science (VIMS)
Contact_Person: Jessica Hendricks
Contact_Position: Scientist
Contact_Address:
Address_Type: mailing and physical
Address: 1375 Greate Road, P.O. Box 1346
City: Gloucester Point
State_or_Province: VA
Postal_Code: 23062
Country: US
Contact_Voice_Telephone: 804-684-7140
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Generated by mp version 2.9.12 on Tue Jan 08 14:09:06 2019