Cheryl Hapke
David Reid
2006
CENCAL_1998_2002 - Vectorized Shoreline of Central California Derived from 1998-2002 Lidar Source Data
1.0
vector digital data
Open-File Report
2006-1251
Pacific Science Center, Santa Cruz, CA
U.S. Geological Survey, Coastal and Marine Geology Program
Cheryl Hapke
David Reid
2006
National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the Sandy Shorelines of the California Coast
1.0
Open-File Report
2006-1251
Pacific Science Center, Santa Cruz, CA
U.S. Geological Survey, Coastal and Marine Geology Program
http://pubs.usgs.gov/of/2006/1251/
Cencal_1998_2002
http://pubs.usgs.gov/of/2006/1251/CCal.zip
There are critical needs for a nationwide compilation of reliable shoreline data. To meet these needs, the U.S. Geological Survey (USGS) has produced a comprehensive database of digital vector shorelines by compiling shoreline positions from pre-existing historical shoreline databases and by generating historical and modern shoreline data. Shorelines are compiled by state and generally correspond to one of four time periods: 1800s, 1920s-1930s, 1970s, and 1998-2002. Each shoreline may represent a compilation of data from one or more sources for one or more dates provided by one or more agencies. Details regarding source are provided in the 'Data Quality Information' section of this metadata report. Shoreline vectors derived from historic sources (first three time periods) represent the high water line at the time of the survey, whereas modern shorelines (final time period) represent the mean high water line.
Historical shoreline change is considered to be a crucial element in studying the vulnerability of the national shoreline. These data are used in a shoreline change analysis for the U.S. Geological Survey (USGS) National Assessment Project.
en
1998
2002
ground condition
None planned
-123.010701
-120.001241
38.201953
34.445401
-123.010701
-120.001241
38.201953
34.445401
General
Shoreline
Historic Shoreline
Shoreline Change Rate
Linear Regression Rate
Endpoint Rate
Baseline
Beach Erosion
Beach Nourishment
LIDAR
T-sheet
Tp-sheet
Coastal Survey Map
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
ESRI polyline shapefile
ISO 19115 Topic Category
oceans
oceans and estuaries
oceans and coastal
elevation
United States
California
General
None
This data set is not to be used for navigational purposes.
Public domain data from the U.S. government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Bruce Richmond
U.S. Geological Survey
mailing and physical address
Pacific Science Center
400 Natural Bridges Drive
Santa Cruz
Ca
95060
USA
(831) 427-4450
(831) 427-4748
Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
Cheryl J. Hapke
David Reid
Bruce M. Richmond
Peter Ruggiero
Jeff List
2006
National Assessment of Shoreline Change Part 3: Historical Shoreline Change and Associated Coastal Land Loss Along Sandy Shorelines of the California Coast
1.0
Open-File Report
2006-1219
Pacific Science Center, Santa Cruz, CA
U.S. Geological Survey, Coastal and Marine Geology Program
http://pubs.usgs.gov/of/2006/1219/
Shapefile
There is significant agreement of linework between adjacent shorelines. Shorelines were checked for accuracy, but no edgematching attempts were made between adjacent shorelines even if slight offsets existed.
This shoreline data adequately represented the shoreline at the time of the survey. Remaining gaps in this data, if applicable, are a consequence of non-existing data or existing data that did not meet quality assurance standards.
The maximum positional error for this shoreline, considered independently, is 1.5m. However, if the lidar mean high water shoreline (mhwl) is used for comparison with other high water shorelines (hwl), an additional shoreline proxy offset must be considered. When the offset error is considered, as it pertains to lidar shorelines of the coastline of California, it varies based on beach slope, wave height, wave length, and tide level. Calculations of these parameters along the open coastline of California were made in order to quantify this bias offset. Please visit our full report on shoreline change along the sandy shoreline of the coast of California (http://pubs.usgs.gov/of/2006/1219/), under the heading 'Uncertainties and Errors', for a complete explanation of the measurement error.
Lidar Vector Shoreline
19980408
19980415
19980417
19980418
20021002
ground condition
Lidar
USGS/NASA Airborne Topographic Mapper
The USGS in collaboration with NASA, used the NASA Airborne Topographic Mapper (ATM II and III) mounted on a Twin Otter Aircraft to map coastal beaches. The raw data was georeferenced at elevation points every few square meters. The original data from ATM was collected in WGS 84, ITRF 97, in a geographic (lat/long) coordinate system with irregular spacing. The data was then converted to NAD 83 and NAVD 88. The shoreline generation involved an analysis of shore-normal profiles at 20m intervals alongshore. First, a shore-parallel reference line was digitized as a permanent baseline for any future shoreline generation. Profiles were assessed at 20m intervals perpendicular to the reference line. Each profile consisted of a 4m wide swath of data points. An algorithm determined the shoreline position for each profile based on a regression fit through the foreshore of the profile. The function was evaluated at the mean high water (mhw) level to identify the horizontal position of the shoreline. Results were only accepted if the R-squared value of the regression was significant to the 95% confidence level. The shoreline point solutions were then quality checked in ArcView GIS software against a gray scale elevation grid of the same data. Point solutions were connected to produce a continuous vector shoreline in shapefile format.
Bruce Richmond
U.S. Geological Survey
mailing and physical address
Pacific Science Center
400 Natural Bridges Drive
Santa Cruz
Ca
95060
USA
(831) 427-4450
(831) 427-4748
Monday through Friday, 8 a.m. to 5 p.m., Pacific Standard Time
Data were projected from UTM zone 10 to geographic with a datum shift from NAD27 to NAD83
Tool: ArcGIS > ArcToolbox > Toolboxes > Data Management Tools > Project
Command issued:
GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]] # NAD_1927_To_NAD_1983_NADCON
20070716
Emily Himmelstoss
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2262
(508) 457-2310
ehimmelstoss@usgs.gov
ArcGIS 9.2 Toolbox
Vector
String
15126
Simple
FALSE
FALSE
TRUE
Polyline
15126
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
GCS_North_American_1983
Decimal degrees0.0000000.000000
Cencal_1998_2002
Vector Shoreline from Lidar Overflight
USGS
15126
Feature Class
FID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
0
FID
OID
0
4
ACCURACY
Position accuracy of feature.
U.S. Geological Survey
0
The accuracy is not given or is not known.
U.S. Geological Survey
ACCURACY
Number
3
Shape
Feature geometry.
ESRI
Coordinates defining the features.
Shape
Number
8
ID
Feature number.
U.S. Geological Survey
1
40677
ID
String
20
TYPE
Type of feature.
U.S. Geological Survey
Shoreline
Vector shoreline.
U.S. Geological Survey
TYPE
String
64
DESCR
Detailed description of the feature.
U.S. Geological Survey
Describes additional characteristics of the feature.
DESCR
String
32
SOURCE
Agency that provided feature or data used to create feature.
U.S. Geological Survey
Describes source data of the feature.
SOURCE
Number
3
DATE_
Date of Lidar Over Flight
USGS
19980408
20021002
DATE_
String
10
U.S. Geological Survey
mailing and physical address
Pacific Science Center
Santa Cruz
Ca
95060
USA
400 Natural Bridges Drive
(831) 427-4450
(831) 427-4748
Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time
Downloadable Data: USGS Open-File Report 2006-1251
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user.
Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.
Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.
SHP
20060901
Seven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbn
no compression applied
1.338
1.338
http://pubs.usgs.gov/of/2006/1251/CCal.zip
http://pubs.usgs.gov/of/2006/1251/#gis
Data may be downloaded via the World Wide Web (WWW).
None
These data are available in Environmental Systems Research Institute (ESRI) 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.
20070716
U.S. Geological Survey
mailing and physical address
Pacific Science Center
400 Natural Bridges Drive
Santa Cruz
Ca
95060
USA
(831) 427-4450
(831) 427-4748
Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time
None
None
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
en
http://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile20070301
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
-123.010701
38.201953
34.445401
-120.001241
1
Cencal_1998_2002
-123.010701
38.201953
34.445401
-120.001241
1
002
Local Area Network
file://\\gisdata\data01\regional\westcoast\shoreline_change\ca_coast\geo\cencal\Cencal_1998_2002.shp
1.338
Shapefile
20060803
20070716
14035700
FALSE
20070301
FALSE
18511200
08584700
{D0B69890-D9E4-4C89-9B06-81EE7A98063D}
20070716
dataset
ISO 19115 Geographic Information - Metadata
DIS_ESRI1.0
GCS_North_American_1983
15126