Possible Costs Associated with Investigating and Mitigating Some Geologic Hazards in Rural Parts of San Mateo County, 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: Brabb, Earl E.
Originator: Roberts, Sebastian
Originator: Cotton, William R.
Originator: Kropp, Alan L.
Originator: Wright, Robert H.
Originator: Zinn, Erik N.
Originator: Mills, Suzanne K.
Originator: Barnes, Jason B.
Originator: Marsolek, Joanna E.
Publication_Date: 2000
Title:

Possible Costs Associated with Investigating and Mitigating Some Geologic Hazards in Rural Parts of San Mateo County, California

Edition: 1.0
Geospatial_Data_Presentation_Form: geologic map
Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 00-127

Publication_Information:

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

Online_Linkage: http://pubs.usgs.gov/of/2000/0127/

Description:

Abstract:

This publication addresses deep-seated landslide susceptibility, debris flow susceptibility, and other geologic hazards in rural parts of western San Mateo County. The report also estimates possible costs of investigating and mitigating the landslide hazards. The study area includes the Half Moon Bay 7.5' quadrangle, the Montara Mountain 7.5' quadrangle, and the Pescadero/Butano Creeks watershed. Hazard maps were derived by integrating slope data and previous geologic, landslide and debris flow mapping. The digital database includes 43 plotfiles for slope maps, Digital Orthophoto Quadrangle maps, Digital Raster Graphic topographic base maps, geologic maps, deep-seated landslide inventory maps, deep-seated landslide susceptibility maps, and debris flow inventory and susceptibility maps. Twelve ARC export files of supporting digital data are included in the database, and other data have been published previously and are available at other USGS websites named in an accompanying pamphlet (of00-127_2. ps, of00-127_2.pdf, of00-127_2.txt).
All data layers are in Universal Transverse Mercator (UTM) projection, zone 10. The scale of the source maps limits the spatial resolution (scale) of the database to 1:24,000.

Purpose:

These susceptibility maps and the cost assessment data allow landowners in rural western San Mateo County to determine if their property is impacted by deep-seated landslide and debris flow hazards and, if so, how much money might be required to investigate them. The information is also useful for land use planners, local officials and public interest groups. For example, the maps will be useful for purposes such as determining where sediment from landslides might adversely affect fish in the various creeks, or where roads might be closed after heavy rainfall.

Supplemental_Information:

An explanatory pamphlet (of00-127_2.ps, of00-127_2.pdf, of00-127_2.txt) accompanies the digital database.

Data_Set_Structure:
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_3a
Part_Description: Debris Flow Susceptibility grid, Pescadero/Butano watershed, 1383 rows, 2545 columns
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_3b
Part_Description: Debris Flow Susceptibility grid, Half Moon Bay quadrangle, 1393 rows, 1114 columns
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_3c
Part_Description: Debris Flow Susceptibility grid, Montara Mountain quadrangle, 1393 rows, 1614 columns
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: of00-127_4a
Part_Description: Deep-seated landslide inventory, Pescadero/Butano watershed
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: of00-127_4b
Part_Description: Deep-seated landslide inventory, Half Moon Bay quadrangle
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: of00-127_4c
Part_Description: Deep-seated landslide inventory, Montara Mountain quadrangle
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_5a
Part_Description: Deep-Seated Landslide Susceptibility grid, Pescadero/Butano watershed, 461 rows, 848 columns
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_5b
Part_Description: Deep-Seated Landslide Susceptibility grid, Half Moon Bay quadrangle, 465 rows, 372 columns
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_5c
Part_Description: Deep-Seated Landslide Susceptibility grid, Montara Mountain quadrangle, 465 rows, 539 columns
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_6a
Part_Description: Slope grid, Pescadero/Butano watershed, 1383 rows, 2545 columns
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_6b
Part_Description: Slope grid, Half Moon Bay quadrangle, 1393 rows, 1114 columns
Data_Set_Part:
Part_Type: Grid
Part_Name: of00-127_6c
Part_Description: Slope grid, Montara Mountain quadrangle, 1393 rows, 1614 columns

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2000

Currentness_Reference:

The date given is the publication date. The information in the report is the most up-to-date available at the time of publication.

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.55760384
East_Bounding_Coordinate: -122.12402152
North_Bounding_Coordinate: 37.62578981
South_Bounding_Coordinate: 37.19339877

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: structural geology
Theme_Keyword: landslides
Theme_Keyword: erosion
Theme_Keyword: geologic maps
Theme_Keyword: geospatial datasets
Theme_Keyword: earthquakes
Theme_Keyword: faulting (geologic)

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: none
Theme_Keyword: landslide
Theme_Keyword: deep-seated landslide
Theme_Keyword: debris flow
Theme_Keyword: geologic hazard
Theme_Keyword: susceptibility
Theme_Keyword: landslide inventory
Theme_Keyword: debris flow inventory
Theme_Keyword: earthquake
Theme_Keyword: fault rupture
Theme_Keyword: liquefaction
Theme_Keyword: ground failure
Theme_Keyword: shaking
Theme_Keyword: coastal erosion
Theme_Keyword: cost
Theme_Keyword: mitigation
Theme_Keyword: investigation
Theme_Keyword: property
Theme_Keyword: slope
Theme_Keyword: landslide deposit

Place:

Place_Keyword_Thesaurus: none
Place_Keyword: United States of America
Place_Keyword: California
Place_Keyword: San Mateo County
Place_Keyword: Half Moon Bay
Place_Keyword: Montara Mountain
Place_Keyword: Pescadero
Place_Keyword: Butano
Place_Keyword: San Francisco Bay Area

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4
Place_Keyword: f06081 = San Mateo

Stratum:

Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Definite landslide deposit
Stratum_Keyword: Probable landslide deposit
Stratum_Keyword: Questionable landslide deposit
Stratum_Keyword: Unattributed landslide deposit
Stratum_Keyword: Young Quaternary landslide deposit
Stratum_Keyword: Questionable young Quaternary landslide deposit
Stratum_Keyword: Old Quaternary landslide deposit
Stratum_Keyword: Questionable old Quaternary landslide deposit

Temporal:

Temporal_Keyword_Thesaurus: None
Temporal_Keyword: Quaternary

Access_Constraints: None

Use_Constraints:

Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:24,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USGS Western Geologic Mapping Team
Contact_Person: Database coordinator

Contact_Address:

Address_Type: mailing address
Address: 345 Middlefield Road, MS 975
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA

Data_Set_Credit:

The authors are grateful to Russell Graymer, David Howell, William Lettis, Bruce Clark, John O'Rourke, Betsy Mathieson, Reid Fisher, Roberta Smith, Gerald Weber, Earl Hart, and John Wade who kindly provided excellent comments used to revise various drafts. Suzanne Mills kindly made corrections to the text, figures and database, and made plots of all the maps. Scott Graham helped to revise the Web text.
Note: Authorship of the geology of this publication resides in the first six names in the author list in the order given. Sebastian Roberts is also the primary digital database author. The last three names, starting with Suzanne K. Mills, are the other digital database authors in the order given.

Native_Data_Set_Environment: SunOS, 5.5.1, sun4u UNIX, ARC/INFO version 7.2.1

Data_Quality_Information:

Logical_Consistency_Report: Polygon and chain-node topology present

Completeness_Report:

The report is intended to be a complete analysis of all previous landslides through 1963 at a 1:24,000 scale.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The position of each data item is derived from the USGS topographic base map, and therefore additional inaccuracies arising from inaccuracies in the base map may also be encountered.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 1991
Title: Digital Raster Graphic Topographic Base Map
Publication_Information:

Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey

Online_Linkage: http://bard.wr.usgs.gov

Source_Scale_Denominator: 24000
Source_Citation_Abbreviation: USGS DRGs
Source_Contribution:

These digital topographic raster graphics (DRGs) are base maps for the study area.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 1998
Title: 10 meter Digital Elevation Model
Publication_Information:

Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey

Online_Linkage: http://bard.wr.usgs.gov

Source_Scale_Denominator: 24000
Source_Citation_Abbreviation: USGS DEMs
Source_Contribution:

On the geohazard website, a shaded relief base is always used on the debris flow susceptibility map, may or may not be used on the deep-seated landslide susceptibility map, or may be displayed by itself. Shading the hillsides from a sun angle of 315 degrees clockwise from north, and an azimuth of 45 degrees creates an illusion of three-dimensional topography. The shaded relief is derived from a 10 meter USGS Digital Elevation Model (DEM). This is a raster data set with cells 10 meters on a side and an elevation value interpolated from the orthophotos described below. A shaded relief grid can be made from a DEM using the ARC/INFO GRID 'hillshade' command. The shaded relief is combined on the map with the other data layers, such as the pink debris- flow susceptibility map, by using the ARC/INFO 'gridcomposite' command. The slope maps are also derived from USGS 10-meter Digital Elevation Models (DEMs) using the ARC/INFO GRID 'slope' command. For each 10-meter cell, the slope is calculated from an average of the slope in each of 8 cells surrounding the 10-meter cell. This slope is expressed as percent rise.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: October 30, 1991
Title: Digital Orthophoto Quadrangle
Publication_Information:

Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey

Online_Linkage: http://bard.wr.usgs.gov

Source_Scale_Denominator: 24000
Source_Citation_Abbreviation: USGS DOQs
Source_Contribution:

The Pescadero watershed DOQ map includes parts of 11 separate DOQs spanning 6 quadrangles. The Half Moon Bay quadrangle includes 4 DOQs in their entirety. The Montara Mountain quadrangle includes 6 DOQs because it is slightly larger than a standard USGS quadrangle.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Brabb, E.E.
Originator: Graymer, R.W.
Originator: Jones, D.L.
Publication_Date: 1998
Title: Palo Alto 30' x 60' Quadrangle, California: a digital database
Edition: Open-File Report 98-348
Geospatial_Data_Presentation_Form: ARC/INFO coverage
Publication_Information:

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

Online_Linkage: http://pubs.usgs.gov/of/1998/of98-348/

Source_Scale_Denominator: 62500
Source_Citation_Abbreviation: USGS OFR 98-348
Source_Contribution:

The geologic map of the Pescadero watershed is from the digital geologic map of the Palo Alto 30' x 60' quadrangle by Brabb and others (1998). This map shows general distribution of bedrock and surficial deposits that can influence the distribution of landslide deposits and affect mitigation costs. The description of the geologic units represented on the geologic map can be found on the unit description sheet accompanying Open-File Report 00-127.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Brabb, E.E.
Originator: Graymer, R.W.
Originator: Jones, D.L.
Publication_Date: 1998
Title:

Geology of the onshore part of San Mateo County, California: A digital database

Edition: Open-File Report 98-137
Geospatial_Data_Presentation_Form: ARC/INFO coverage
Publication_Information:

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

Online_Linkage: http://pubs.usgs.gov/of/1998/of98-137/

Source_Scale_Denominator: 62500
Source_Citation_Abbreviation: USGS OFR 98-137
Source_Contribution:

The geologic maps of Half Moon Bay and Montara Mountain quadrangles are from the geologic map of San Mateo County by Brabb and others (1998). This map shows general distribution of bedrock and surficial deposits that can influence the distribution of landslide deposits and affect mitigation costs. The description of the geologic units represented on the geologic map can be found on the unit description sheet accompanying Open- File Report 00-127.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Ellen, S.D.
Originator: Mark, R.K.
Originator: Wieczorek, G.F.
Originator: Wentworth, C.M.
Originator: Ramsey, D.W.
Originator: May, T.E.
Publication_Date: 1997
Title:

Map showing principal debris-flow source areas in the San Francisco Bay region, California

Edition: Open-File Report 97-745e
Geospatial_Data_Presentation_Form: ARC/INFO coverage
Series_Information:

Series_Name: San Francisco Bay Region Landslide Folio

Publication_Information:

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

Online_Linkage: http://pubs.usgs.gov/of/1997/of97-745/

Source_Scale_Denominator: 125000
Source_Citation_Abbreviation: USGS OFR 97-745e
Source_Contribution:

Debris flow points of origin from these maps are incorporated into the debris flow hazard map included in the OF00-127 database.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Brabb, E. E.
Originator: Pampeyan, E.H.
Publication_Date: 1972
Title: Preliminary Map of Landslides in San Mateo County, California
Edition: Miscellaneous Field Studies Map MF-344
Geospatial_Data_Presentation_Form: geologic map
Publication_Information:

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

Source_Scale_Denominator: 62500
Source_Citation_Abbreviation: USGS MF-344
Source_Contribution:

The digital compilation of the landslide inventory for the Pescadero watershed and the Half Moon Bay quadrangle was derived from this map.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Pampeyan, E. H.
Publication_Date: 1994
Title:

Geologic map of the Montara Mountain and San Mateo 7.5' quadrangles, San Mateo County, California

Edition: Miscellaneous Investigations Map I-2390
Geospatial_Data_Presentation_Form: geologic map
Publication_Information:

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

Source_Scale_Denominator: 24000
Source_Citation_Abbreviation: USGS I-2390
Source_Contribution:

The digital compilation of the landslide inventory for the Montara Mountain quadrangle was derived from this map.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Brabb, E. E.
Originator: Pampeyan, E.H.
Originator: Bonilla, M.G.
Publication_Date: 1972
Title: Landslide Susceptibility in San Mateo County, California
Edition: Miscellaneous Field Studies Map MF-360
Geospatial_Data_Presentation_Form: geologic map
Publication_Information:

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

Source_Scale_Denominator: 62500
Source_Citation_Abbreviation: USGS MF-360
Source_Contribution:

The deep-seated landslide susceptibility grids were developed in ARC/INFO GRID and are based on this susceptibility matrix developed by Brabb and others (1972).
The maps are constructed using three source maps: a slope map, a geologic map, and a landslide inventory map (all described above). To develop the 1972 susceptibility map, Brabb and others superimposed the landslide inventory map onto a geologic map and arranged the geologic units by increasing percentage of area that had failed due to landsliding. The units were then given an overall susceptibility ranging from I (low) to VII (high). The highest susceptibility class (L) was assigned to the landslide deposits themselves, because they were believed to be more susceptible to future landsliding than the rock units from which they are derived. The slope map was then superimposed onto the combined geologic map and landslide inventory map to determine the incidence of landsliding in each geologic unit in each slope category. The overall susceptibility rating for the geologic unit was adjusted downward where no landslides had formed on low slopes. The primary differences between the 1972 map and the susceptibility maps provided here are the use of new slope maps and the use of polygons around just the landslide deposits. On the 1972 map, areas between the deposits and the scarps were also included as a landslide polygon. The matrix table used by Brabb and others (1972) for the entire county is the same one used here. Susceptibility numbers are assigned for each 30-meter cell depending on the unit-slope combination defined in the table. Only the three highest hazard zones, including the landslide deposits (L), are used to determine costs on the web site because these zones are the same ones used by San Mateo County (1973) to restrict development.

Process_Step:

Process_Description:

Data from the published sources was combined and interpreted using methods described in Brabb and others (1972).

Process_Date: 1998

Process_Step:

Process_Description: Creation of original metadata record
Process_Date: 20000804
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: S. K. Mills
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: Mailing
Address: 345 Middlefield Rd., M/S 975
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA

Contact_Voice_Telephone: 650-329-4915
Contact_Electronic_Mail_Address: skmills@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector and Raster
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 10
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123
Latitude_of_Projection_Origin: 0.0
False_Easting: 0.0
False_Northing: -500000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 1.0
Ordinate_Resolution: 1.0

Planar_Distance_Units: METERS

Geodetic_Model:

Horizontal_Datum_Name: NAD27
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_4A.PAT
Entity_Type_Definition: Attribute table of OF00-127_4A.PAT.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: PTYPE
Attribute_Definition: Landslide label
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: D
Enumerated_Domain_Value_Definition: Definite landslide deposit

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: P
Enumerated_Domain_Value_Definition: Probable landslide deposit

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: UA
Enumerated_Domain_Value_Definition: Unattributed landslide deposit

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: ?
Enumerated_Domain_Value_Definition: Questionable landslide deposit

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_4A.AAT
Entity_Type_Definition: Attribute table of OF00-127_4A.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: LTYPE
Attribute_Definition:

Type of geologic or geographic feature denoted by a line in the database.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: contact, certain
Enumerated_Domain_Value_Definition: landslide boundary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: map boundary
Enumerated_Domain_Value_Definition: watershed boundary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: topographic escarpment
Enumerated_Domain_Value_Definition: landslide escarpment

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_4B.PAT
Entity_Type_Definition: Attribute table of OF00-127_4B.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: PTYPE
Attribute_Definition:

refer to the definition of PTYPE listed for OF00-127_4A.PAT, as all PTYPEs in OF00-127_4A.PAT are identical to those in OF00-127_4B.PAT.

Attribute_Definition_Source: author

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_4B.AAT
Entity_Type_Definition: Attribute table of OF00-127_4B.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: LTYPE
Attribute_Definition:

refer to LTYPE definitions listed under OF00-127_4A.AAT, as all LTYPEs in OF00-127_4A.AAT are identical to those in OF00-127_4B.AAT.

Attribute_Definition_Source: author

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_4C.PAT
Entity_Type_Definition: Attribute table of OF00-127_4C.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: PTYPE
Attribute_Definition: Landslide label
Attribute_Definition_Source: author
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qol
Enumerated_Domain_Value_Definition: Old Quaternary landslide deposit

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qol?
Enumerated_Domain_Value_Definition: Questionable old Quaternary landslide deposit

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyl
Enumerated_Domain_Value_Definition: Young Quaternary landslide deposit

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyl?
Enumerated_Domain_Value_Definition: Questionable young Quaternary landslide deposit

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_4C.AAT
Entity_Type_Definition: Attribute table of OF00-127_4C.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: LTYPE
Attribute_Definition:

refer to LTYPE definitions listed under OF00-127_4A.AAT, as all LTYPEs in OF00-127_4A.AAT are identical to those in OF00-127_4C.AAT.

Attribute_Definition_Source: author

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_3A.VAT
Entity_Type_Definition: Attribute table of OF00-127_3A.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: VALUE
Attribute_Definition: debris flow susceptibility
Attribute_Definition_Source: author
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 15
Enumerated_Domain_Value_Definition: having a slope >= 15%
Enumerated_Domain_Value_Definition_Source: author

Attribute:

Attribute_Label: COUNT
Attribute_Definition: Number of GRID cells of a VALUE
Attribute_Definition_Source: Computed

Detailed_Description:

Entity_Type:

Entity_Type_Label: OF00-127_5A.VAT
Entity_Type_Definition: Attribute table of OF00-127_5A.
Entity_Type_Definition_Source: ARC/INFO

Attribute:

Attribute_Label: VALUE
Attribute_Definition: relative landslide susceptibility
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 7

Attribute:

Attribute_Label: COUNT
Attribute_Definition: Number of GRID cells of a VALUE
Attribute_Definition_Source: Computed

Overview_Description:

Entity_and_Attribute_Overview:

The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California). Almost all the attributes in the attribute tables of the landslide inventory coverages included in the report are set or calculated by ARC/INFO. The exceptions are "coveragename"-ID, LTYPE, and PTYPE. " coveragename"-ID is required by internal policy to be sequential. This ensures the highest compatibility of our databases with other GISs. Therefore "coveragename"-ID is calculated equal to " coveragename"#, which is a unique, sequential integer assigned by ARC/INFO to each data record. LTYPE and PTYPE are author added items to the coverage AAT or PAT that are used to describe the type of line (LTYPE) or landslide area (PTYPE) being recorded. The PTYPEs define the degree of confidence which the author had when identifying the area as a landslide deposit. All coverages include these items in the data structure. Each item has WIDTH 35, OUTPUT 35, TYPE C. For the susceptibility grids, integers stored in the database field VALUE of the VAT correspond to susceptibility values. In the debris flow susceptibility grids, the value '15' designates cells with a slope greater than or equal to 15%, which corresponds to areas susceptible to debris flows. In the landslide susceptibility grids, each cell is assigned a relative susceptibility value of 0 through 7. The slope grids contain slope data stored as continuous floating-point numbers, and thus a VAT is not present for these grids.

Entity_and_Attribute_Detail_Citation: This report combined with the explanatory pamphlet: of00-127_2.

Distribution_Information:

Distributor:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey Information Services

Contact_Address:

Address_Type: mailing address
Address: Box 25248, Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80255-0286
Country: USA

Contact_Voice_Telephone: 1-888-ASK-USGS
Contact_Facsimile_Telephone: 1-303-202-4693

Resource_Description: USGS Open-File Report OF-00-127
Distribution_Liability:

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this publication 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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE
Format_Version_Number: 7
Format_Information_Content: Grids (10m resolution) of debris-flow susceptibility
File_Decompression_Technique: gzip -d
Transfer_Size: 1

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20160205
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_Extensions:

Online_Linkage: http://geology.usgs.gov/tools/metadata/tools/ext/parts.ext

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/00-127/metadata.html>