Preliminary soil-slip susceptibility maps, southwestern California

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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: Douglas M. Morton
Originator: Rachel M.H. Alvarez
Originator: Russell H. Campbell
Publication_Date: 2003
Title:

Preliminary soil-slip susceptibility maps, southwestern California

Edition: Version 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 03-17

Publication_Information:

Publication_Place: Menlo Park, California
Publisher: U.S. Geological Survey

Online_Linkage: http://pubs.usgs.gov/of/2003/0017/

Description:

Abstract:

This data set maps the soil-slip susceptibility for several areas in southwestern California. Created using Environmental Systems Research Institute's ARC/INFO software, the data base consists of raster maps containing grid cells coded with soil- slip susceptibility values. In addition, the data set includes the following graphic and text products: (1) postscript graphic plot files containing the soil-slip susceptibility map, topography, cultural data, and a key of the colored map units, and (2) PDF and text files of the Readme (including the metadata file as an appendix) and accompanying text, and a PDF file of the plot files.
Intense winter rains commonly generated debris flows in upland areas of southwestern California. These debris flows initiate as small landslides referred to as soil slips. Most of the soil slips mobilize into debris flows that travel down slope at varying speeds and distances. The debris flows can be a serious hazard to people and structures in their paths. The soil-slip susceptibility maps identify those natural slopes most likely to be the sites of soil slips during periods of intense winter rainfall. The maps were largely derived by extrapolation of debris-flow inventory data collected from selected areas of southwestern California. Based on spatial analyses of soil slips, three factors in addition to rainfall, were found to be most important in the origin of soil slips. These factors are geology, slope, and aspect. Geology, by far the most important factor, was derived from existing geologic maps. Slope and aspect data were obtained from 10-meter digital elevation models (DEM). Soil-slip susceptibility maps at a scale of 1:24,000 were derived from combining numerical values for geology, slope, and aspect on a 10-meter cell size for 128 7.5' quadrangles and assembled on 1:100,000-scale topographic maps. The resultant maps of relative soil-slip susceptibility represent the best estimate generated from available debris-flow inventory maps and DEM data.

Purpose:

These data sets were derived to describe the relative soil-slip susceptibility for upland areas of southwestern California. Although released on a 1:100,000-scale topographic base, the data were derived at a scale of 1:24,000 and as such can be transferred from 1:100,000-scale to 1:24,000-scale without any loss of accuracy. The maps are not intended to be used at any scale larger than 1:24,000.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2003

Currentness_Reference: Not for use after June, 2003

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -120.00446939
East_Bounding_Coordinate: -116.8742505
North_Bounding_Coordinate: 34.52044023
South_Bounding_Coordinate: 32.49939779

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geology
Theme_Keyword: maps and atlases
Theme_Keyword: landslides
Theme_Keyword: landslide susceptibility assessment
Theme_Keyword: geospatial datasets

Theme:

Theme_Keyword_Thesaurus: none
Theme_Keyword: Soil slips
Theme_Keyword: Debris flows

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: none
Place_Keyword: California
Place_Keyword: Southwestern California
Place_Keyword: Los Angeles County
Place_Keyword: Orange County
Place_Keyword: Riverside County
Place_Keyword: San Bernardino County
Place_Keyword: San Diego County
Place_Keyword: Santa Barbara County
Place_Keyword: Ventura County

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4
Place_Keyword: f06037 = Los Angeles
Place_Keyword: f06059 = Orange
Place_Keyword: f06065 = Riverside
Place_Keyword: f06071 = San Bernardino
Place_Keyword: f06073 = San Diego
Place_Keyword: f06083 = Santa Barbara
Place_Keyword: f06111 = Ventura

Access_Constraints: none
Use_Constraints:

This data base is not to be used at a scale larger than 1:24,000.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Douglas M. Morton
Contact_Organization:

U.S. Geological Survey, Western Region, Earth Surface Processes Team

Contact_Position: Project geologist
Contact_Address:

Address_Type: mailing address
Address: U.S. Geological Survey
Address: Department of Earth Sciences
Address: University of California, Riverside
City: Riverside
State_or_Province: California
Postal_Code: 92521
Country: United States of America

Contact_Voice_Telephone: (909) 276-6397
Contact_Facsimile_Telephone: (909) 276-6295
Contact_Electronic_Mail_Address: scamp@usgs.gov

Data_Set_Credit:

Geologic mapping and digital preparation of this report were sponsored jointly by (1) the National Cooperative Geologic Mapping Program of the U.S. Geological Survey, (2) the California Geological Survey, and (3) the Southern California Areal Mapping Project (SCAMP). The California Geological Survey graciously provided geologic map data and critical input.

Native_Data_Set_Environment:

Windows_NT, 5.0, Intel ARC/INFO version 8.1

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The map meets national geologic map standards. The digital elevation data meet U.S. Geological National Digital Elevation Model standards.

Completeness_Report:

The map reflects the most accurate geologic map data and DEM data currently available to the U.S. Geological Survey.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

For accuracy information for DEM data refer to the U.S. Geological Survey Digital Elevation Models, Data User's Guide 5. Complete reference is in the explanatory text document.

Lineage:

Process_Step:

Process_Description:

Process included mapping debris flows from several generations of aerial photographs in selected areas of southwestern California. Debris flows were transferred by inspection to 7.5' topographic quadrangle maps to produce debris flow inventory maps. Debris flow inventory maps were digitized in a GIS system (Arc/Info). Geologic data were obtained from digital geologic data bases from various sources. Digital elevation data were obtained from U.S. Geological Survey digital elevation models (DEM). Susceptibility values were the product of numerical values assigned to geologic map units, slope, and aspect.

Process_Date: 200209 - 200301

Process_Step:

Process_Description:

First draft of metadata created by Rachel Alvarez using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set

Process_Date: 20030108

Process_Step:

Process_Description: Digital database review by Scott Graham.
Process_Date: 20030113

Process_Step:

Process_Description: Creation of original metadata record
Process_Date: 20030108
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: Rachel M.H. Alvarez

Contact_Position: Geologist
Contact_Address:

Contact_Voice_Telephone: (909) 276-6397
Contact_Facsimile_Telephone: (909) 276-6295
Contact_Electronic_Mail_Address: rhauser@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Grid Cell
Row_Count: 22569
Column_Count: 29031

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 11
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -117
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 10.0
Ordinate_Resolution: 10.0

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Version 1.0 of the Preliminary Soil-Slip Susceptibility Maps, Southwestern California comprises seven ARC/INFO grids, la_sus, lb_sus, ocs_sus, sbern_sus, sd_sus, sa_sus, sbarb_sus, which contain soil-slip susceptibility values.

 Grid name   Quadrangle name
 la_sus      Los Angeles
 lb_sus      Long Beach
 ocs_sus     Oceanside
 sbern_sus   San Bernardino
 sd_sus      San Diego and El Cajon
 sa_sus      Santa Ana
 sbarb_sus   Santa Barbara

The item names and definitions are the same for each raster data set and are as follows:

*_sus.vat
COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
    1  VALUE                  4    10     B      -
    5  COUNT                  4    10     B      -
    9  SUSCODE                8     8     N      3


*_sus.sta
COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
    1  MIN                    8    15     F      3
    9  MAX                    8    15     F      3
   17  MEAN                   8    15     F      3
   25  STDV                   8    15     F      3

The item suscode contains the susceptibility values.

Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/of/2003/0017/pdf/of03-17.pdf

Detailed_Description:

Entity_Type:

Entity_Type_Label: *.vat
Entity_Type_Definition:

Susceptibility values identified in each of the seven mapped areas (the Santa Barbara 100K sheet, the Los Angeles 100K sheet, the south half of the San Bernardino 100K sheet, the Long Beach 100K sheet, the Santa Ana 100K sheet, the Oceanside 100K sheet, and the San Diego and western El Cajon 100K sheets)

Attribute:

Attribute_Label: suscode
Attribute_Definition:

Number corresponding to a susceptibility. Generally, the numbers can be interpreted as follows:

    6 through  999: low susceptibility
 1000 through 3250: moderate susceptibility
 3251 through 5000: high susceptibility

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0
Enumerated_Domain_Value_Definition:

A value of 0 indicates the cell does not meet the criteria needed to fall into the low, moderate or high susceptibility categories.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 6
Range_Domain_Maximum: 5000
Attribute_Measurement_Resolution: 1

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey Information Services

Contact_Address:

Address_Type: mailing address
Address: Box 25286 Denver Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80225
Country: USA

Contact_Voice_Telephone: (303) 202-4700
Contact_Facsimile_Telephone: (303) 202-4693

Resource_Description: USGS Open-File Report 03-17
Distribution_Liability:

The U.S. Geological Survey (USGS) provides these geographic data "as is". The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS.
These digital map databases, 1:100,000 scale, and any derivative maps thereof, is not meant to be used or displayed at any scale larger than 1:24,000 (e.g., 1:12,000).

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcInfo Grid
Format_Version_Number: 8.x
Format_Information_Content: Soil-slip susceptibility grids
File_Decompression_Technique: gzip and tar
Transfer_Size: 31

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://pubs.usgs.gov/of/2003/0017/sbarb_sus.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/of/2003/0017/la_sus.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/of/2003/0017/sbern_sus.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/of/2003/0017/lb_sus.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/of/2003/0017/sa_sus.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/of/2003/0017/ocs_sus.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/of/2003/0017/sd_sus.tar.gz

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20160610
Metadata_Review_Date: 20030113
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Peter N Schweitzer
Contact_Organization: USGS Midwest Area

Contact_Position:

Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/

Contact_Address:

Address_Type: mailing address
Address:

Mail Stop 954
12201 Sunrise Valley Dr

City: Reston
State_or_Province: VA
Postal_Code: 20192-0002
Country: USA

Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: none
Metadata_Use_Constraints: none

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/03-17/metadata.html>