U.S. Geological Survey
2015
Digital Shoreline Analysis System (DSAS) version 4.3 transects with end-point rate calculations for exposed shorelines between Point Barrow and Icy Cape for the time period 1947 to 2012
vector digital data
Open-File Report
2015-1030
Pacific Coastal and Marine Science Center, Santa Cruz and Menlo Park, CA
U.S. Geological Survey, Coastal and Marine Geology Program
http://pubs.usgs.gov/of/2015/1030/downloads/EastChukchi_exposed_transects.zip
Ann E. Gibbs
2015
National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the North Coast of Alaska, U.S.-Canadian Border to Icy Cape
Open-File Report
2015-1030
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/of/2015/1030/
The Arctic Coastal Plain of northern Alaska is an area of strategic economic importance to the United States, is home to remote Native American communities, and encompasses unique habitats of global significance. Coastal erosion along the north coast of Alaska is chronic, widespread, may be accelerating, and is threatening defense and energy-related infrastructure, natural shoreline habitats, and Native communities. There is an increased demand for accurate information regarding past and present shoreline changes across the United States. To meet these national needs, the Coastal and Marine Geology Program of the U.S. Geological Survey (USGS) is compiling existing reliable historical shoreline data along sandy shores of the conterminous United States and parts of Alaska and Hawaii under the National Assessment of Shoreline Change project.
There is no widely accepted standard for analyzing shoreline change. Existing shoreline data measurements and rate calculation methods vary from study to study and prevent combining results into state-wide or regional assessments. The impetus behind the National Assessment project was to develop a standardized method of measuring changes in shoreline position that is consistent from coast to coast. The goal was to facilitate the process of periodically and systematically updating the results in an internally consistent manner.
This dataset consists of shoreline change rates for the north coast of Alaska between Point Barrow and Icy Cape. Rate calculations were computed within a GIS using the Digital Shoreline Analysis System (DSAS) version 4.3, an ArcGIS extension developed by the U.S. Geological Survey. Rates of shoreline change were calculated using an end-point rate method based on shorelines between 1947 and 2012 to provide an approximately 65-yr rate. A reference baseline was used as the originating point for the orthogonal transects cast by the DSAS software. The transects intersect each shoreline establishing measurement points, which are then used to calculate change rates.
1947
2012
ground condition
None planned
-161.956503072
-156.468395224
71.3900102677
70.2843959875
USGS Metadata Identifier
USGS:fa5ffbfa-84ec-43e6-8b60-919d5ebc2c26
None
Shoreline
Historic Shoreline
Shoreline Change Rate
Erosion
Accretion
End-point Rate
Baseline
Transect
Digital Shoreline Analysis System
DSAS
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Pacific Coastal and Marine Science Center
PCMSC
ISO 19115 Topic Category
oceans
environment
geoscientificInformation
Marine Realms Information Bank (MRIB) keywords
effects of coastal change
coastal processes
shoreline accretion
shoreline erosion
USGS Thesaurus
coastal processes
erosion
shoreline accretion
Coastal and Marine Ecological Classification Standard (CMECS)
Continental/Island Shore Complex
Geographic Names Information System (GNIS)
North Slope
Beaufort Sea
Barrow
Demarcation Bay
Jago River
Staines River
Sagavanirktok River
Colville River
Cape Halkett
Harrison Bay
Drew Point
Tangent Point
Smith Bay
Elson Lagoon
Peard Bay
Alaska
Arctic National Wildlife Refuge
General
United States
Arctic
National Petroleum Reserve-Alaska
NPR-A
ANWR
Coastal and Marine Ecological Classification Standard (CMECS)
Chukchi Sea Ecoregion
Coastal and Marine Ecological Classification Standard (CMECS)
Substrate
None
This information is not intended for navigational purposes.
Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data.
Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is 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.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
U.S. Geological Survey
Ann E. Gibbs
mailing and physical address
Pacific Coastal and Marine Science Center
400 Natural Bridges Dr.
Santa Cruz
CA
95060-5792
USA
831-460-7540
831-427-4748
agibbs@usgs.gov
Environment 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)
Ann E. Gibbs
Bruce M. Richmond
2015
National Assessment of Shoreline Change: Historical Shoreline Change along the North Coast of Alaska, U.S.-Canadian Border to Icy Cape
Open-File Report
2015-1030
Santa Cruz, CA
U.S. Geological Survey, Coastal and Marine Geology Program
http://pubs.usgs.gov/of/2015/1030/
E.R. Thieler
E.A. Himmelstoss
J.L. Zichichi
A. Ergul
2009
Digital Shoreline Analysis System (DSAS) version 4.0 - An ArcGIS extension for calculating shoreline change
Open-File Report
2008-1278
Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
Current version at time of use was 4.3
http://woodshole.er.usgs.gov/project-pages/dsas/
http://woodshole.er.usgs.gov/project-pages/dsas/version4/index.html
The attributes of this dataset are based on the field requirements of the Digital Shoreline Analysis System and were automatically generated by the software during the generation of the transect layer or during the calculation of shoreline change rates performed by the software.
These data were generated using DSAS v4.3, an automated software program which does not perform checks for fidelity of the input features. The transects were visually inspected and sometimes manually adjusted within a standard ArcMap edit session to adjust the position at which an individual transect intersected the shorelines.
This dataset contains the transects automatically generated by the DSAS software application that were used to calculate shoreline change rates along sections of the north coast of Alaska, between the U.S.-Canadian border and Icy Cape, where shoreline position data were available. Additional transects may have been generated but did not intersect the shoreline dates specified.
A formal accuracy assessment of the horizontal positional information in the data set has not been conducted.
A formal accuracy assessment of the vertical positional information in the data set has either not been conducted, or is not applicable.
Transect Features Generated using DSAS v4.2 in ArcMap v9.3. Parameters Used: baseline layer=UTMX_Baseline, transect spacing=50 meters, transect length=500m, cast direction=onshore, baseline location=offshore, cast method=smoothed, smoothing distance=50 meters. For additional details on these parameters, please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: http://pubs.usgs.gov/of/2008/1278/
2012
Some transects did not intersect all shorelines at the default transect length. These transects were manually lengthened in an edit session using standard editing tools in ArcMap v10.1. Some transects intersected the shorelines at an oblique angle. These transects were manually adjusted to a more shore-normal position in an edit session using standard editing tools in ArcMap v9.3.
2012
Rate calculations performed in DSAS v4.3 using ArcMap v10.1 on selected shoreline features. Parameters Used: shoreline layer= Shorelines_EastChukchi, shoreline date field=DATE_, shoreline uncertainty field name=Uncy, the default accuracy= 0 meters, shoreline intersection parameters=nearest, stats calculations=[End Point Rate (EPR)], shoreline threshold=2, confidence interval=90%, Output rate table name= Transects_EastChukchi_Exposed_rates_20141008_162633
20141008
Shoreline rates table (Transects_EastChukchi_Exposed_rates_20141008_162633) was joined to the transect feature class in ArcMap v10.1 by right-clicking on the transect layer > joins and relates > join > join attributes from a table. Parameters: join field - ObjectID; table to join - Transects_EastChukchi_Exposed_rates_20141008_162633; field in table: TransectID; join options - keep only matching records.
20141008
The joined transect feature class was exported to a shapefile in ArcMap v10.1 by right-clicking the transect layer > data > export data, permanently linking the joined rate fields to the transect attribute table.
20141008
The exported transect shapefile was projected in Esri's ArcToolbox (v.10.1) > Data Management Tools > Projections and Transformations > Feature > Project. Parameters: input projection - UTM zone XN (NAD83; where X is the corresponding UTM Zone); output projection - geographic coordinates (WGS84); transformation = WGS_1984_(ITRF00)_To_NAD_1983.
20141008
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
20170207
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata.
20180426
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
20201019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
String
5022
0.0196082030
0.0572840268
Decimal seconds
D_WGS_1984
WGS_1984
6378137.0
298.257223563
Attribute Table
Table containing attribute information associated with the data set.
Producer defined
OBJECTID
Internal feature number generated for each row of the transect attribute table when stored as a feature class in a geodatabase. This value is the common attribute field when joining to the TransectID value in short-term results output table calculated by DSAS.
U.S. Geological Survey
241
5463
BaselineID
Unique identification number of the baseline segment. If BaselineID=0 no transects will be generated. Used by DSAS to determine transect ordering alongshore if multiple baseline segments exist.
U.S. Geological Survey
1
9
Group_
Region ID as defined in Gibbs and Richmond (Cross referenced in this report)
U.S. Geological Survey
8
Dease Inlet to Barrow
Producer defined
9
Barrow to Peard Bay
Producer defined
10
Peard Bay to Icy Cape
Producer defined
TransOrder
Assigned by DSAS based on ordering of transects along the baseline. Used to allow user to sort transect data along the baseline from baseline start to baseline end.
U.S. Geological Survey
1
5099
ProcTime
Assigned by DSAS automatically to record the date and time a transect was processed.
U.S. Geological Survey
Unknown
Autogen
Assigned by DSAS to indicate whether or not a transect was automatically created by DSAS (1= transect was auto generated by DSAS; blank or 0=transect was not auto-generated).
U.S. Geological Survey
0
Unknown
Producer defined
1
Transect was auto generated by DSAS
Producer defined
StartX
Assigned by DSAS automatically to record the X coordinate of the beginning of the transect in meter units
U.S. Geological Survey
388839.46
589686.43
StartY
Assigned by DSAS automatically to record the Y coordinate of the beginning of the transect in meter units
U.S. Geological Survey
7799590.16
7922716.21
EndX
Assigned by DSAS automatically to record the X coordinate of the end of the transect in meter units
U.S. Geological Survey
389282.23
590199.19
EndY
Assigned by DSAS automatically to record the Y coordinate of the end of the transect in meter units
U.S. Geological Survey
7799245.82
7922412.88
Azimuth
Assigned by DSAS to record the azimuth of the transect measure in degrees clockwise from North. When zero, transect was manually created by user.
U.S. Geological Survey
104.93
253.1
ShoreType
User defined shoreline type
U.S. Geological Survey
Exposed Barrier Beach
Unknown
Producer defined
Exposed Barrier Island
Unknown
Producer defined
Exposed Barrier Spit
Unknown
Producer defined
Exposed Mainland
Unknown
Producer defined
SHAPE_Leng
Length of feature in meter units
U.S. Geological Survey
117.652782719
842.310786497
meter
TransectId
Same value as ObjectID. Used as a permanent and unique identification number for each transect in the output rates table calculated by DSAS. This attribute was used as the common field when joining the rates table (.dbf) to the transect feature class in a geodatabase.
U.S. Geological Survey
241
5463
EPR
The end point rate is calculated by dividing the distance of shoreline movement by the time elapsed between the two shorelines. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion.
U.S. Geological Survey
-8.5
8.05
meters per year
ECI
Describes the uncertainty of the reported end point rate in meters. The shoreline uncertainties for the two positions used in the end point calculation are each squared, then added together (summation of squares). The square root of the summation of squares is divided by the number of years between the two shorelines. This result is reported as the confidence of the end point rate calculation (ECI).
U.S. Geological Survey
0.267
0.295
All calculations for length are in meter units and were based on the coincident UTM zone WGS84
Unknown
U.S. Geological Survey
mailing and physical address
Pacific Coastal and Marine Science Center
400 Natural Bridges Dr.
Santa Cruz
CA
95060-5792
USA
831-460-7540
831-427-4748
EastChukchi_exposed_transects.shp
This information is not intended for navigational purposes.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is 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.
Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
vector digital data
9.0
Esri polyline shapefile
This WinZip file contains a shapefile of transects generated by the Digital Shoreline Analysis System including short-term rate calculations for the Alaska North Coast region from the U.S.-Canadian border to Icy Cape.
Use WinZip or pkUnzip
0.396
http://pubs.usgs.gov/of/2015/1030/downloads/EastChukchi_exposed_transects.zip
Data are downloadable via the World Wide Web (WWW).
None
This zip file contains data available in Environmental Systems Research Institute (Esri) polyline shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from Esri at www.esri.com.
20201019
Ann E. Gibbs
U.S. Geological Survey
Geologist
mailing and physical address
Pacific Coastal and Marine Science Center
400 Natural Bridges Dr.
Santa Cruz
CA
95060-5792
USA
831-460-7540
831-427-4748
agibbs@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time