OFR O-03-10, Earthquake and Landslide Hazard Maps and Future Earthquake Damage Estimates for Clackamas County, Oregon

Citation:

Citation Information:

Originator:
R. Jon Hofmeister, Ian P. Madin, and Yumei Wang, Department of Geology and Mineral Industries, Portland, Oregon
Carol S. Hasenberg, Civil Engineering Department, Portland State University, Portland, Oregon

Publication Date: 10/31/2003
Publication Time: Unknown
Title: OFR O-03-10, Earthquake and Landslide Hazard Maps and Future Earthquake Damage Estimates for Clackamas County, Oregon
Edition: 1.0
Geospatial Data Presentation Form: Vector
Series Information:

Series Name: Open-File Report
Issue Identification: O-03-10

Publication Information:

Publication Place: Portland, Oregon
Publisher: Oregon Department of Geology and Mineral Industries

Other Citation Details:
A map showing relative earthquake hazards in Clackamas County is shown in DOGAMI's publication, Open-File Report OFR O-03-09, 2003, Relative Earthquake and Landslide Hazards in Clackamas County. Together with a relative earthquake hazard map, single hazard maps for ground shaking amplification, liquefaction, and slope instability within the same county are also included. The purpose of the map is to characterize those areas just in Clackamas County where further on-the-ground investigation is prudent prior to land management and development activities.

A county-level, polygon-based ESRI ArcView shapefile is the basis for the relative earthquake hazards used to prepare this map. The shapefile contains polygons representing areas having tendencies to experience damage due to any combination of the following hazards: liquefaction, ground shaking amplification, or slope instability. Questions regarding the process for deriving the polygons should be directed to Clackamas County Geographic Information Systems, a division of the Information Service Department.

Description:

Abstract:
Earthquakes and landslides pose significant hazards in many parts of Oregon. Extremely significant coastal earthquakes along the Cascadia Subduction Zone (magnitudes ~9.0) have occurred many times in our geologic past (Atwater, 1987; Yamaguchi and others, 1997), and scientific consensus is that we can expect them to happen again (Clague and others 2000). Smaller—yet also significant—crustal earthquakes also pose significant local risks in Oregon due to the proximity of many fault sources near our downtown centers. Important reminders of the danger and impact of local earthquakes include the relatively recent magnitude 5.6 earthquake that occurred near Scotts Mills in 1993 and the Klamath Falls earthquakes (magnitudes 5.9 and 6.0) that occurred later that year. Combined, these earthquakes caused more than $40 million in direct damage. Many parts of Oregon are also highly susceptible to landslide impacts. Particularly in the mountainous portions of the state, landslides pose significant threats to our citizens and infrastructure, and negative impacts are likely to accelerate as population growth continues to expand development into steeper terrain. Most of our landslide damages have been associated with severe winter storms where landslide losses can exceed $100 million in direct damage (such as the February 1996 event-see FEMA 1996), but annual maintenance and repair costs for landslides are still significant at approximately $10 million (Wang and others 2002). Landslides induced by earthquake shaking are likely in many parts of Oregon, and losses associated with sliding in moderate-to-large earthquakes are likely to be significant. This study was initiated by Clackamas County as part of Project Impact efforts to better address earthquake and landslide hazards. The two main objectives of this study were to (a) develop a set of county-wide maps to identify areas of relatively low and high earthquake and landslide hazard, and (b) to improve the county’s capabilities for earthquake damage and loss estimation. The body of this report describes the results for these two main components (the relative hazard maps and earthquake damage and loss modeling using HAZUS). Preceding the main body of the report is a brief coverage of some previous work that is particularly relevant to these subjects, and a short introduction to the geographic setting of the project. The final sections of the report include some discussion of possible uses of the study products, and some initial recommendations for county implementations.

Purpose: The primary focus of this study was to develop county-wide relative earthquake and landslide hazard information, and improve the county’s capabilities for earthquake damage and loss estimation.
Supplemental Information:
A description of how the underlying geologic and geophysical data were prepared as well as the methology used to calculate ground shaking amplification, liquefaction, and regional landslide hazards can be found in the following report: R. Jon Hofmeister, Carol S. Hasenberg, Ian P. Madin, and Yumei Wang, 2003, Earthquake and Landslide Hazard Maps and Future Earthquake Damage Estimates for Clackamas County, Oregon: Oregon Department of Geology and Mineral Industries Open-File Report O-03-10.
Time Period of Content:

Time Period Information:

Single Date/Time:

Calendar Date: 10/31/2003
Time of Day: Unknown

Currentness Reference: publication date

Status:

Progress: In Work
Maintenance and Update Frequency: None planned

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -122.874
East Bounding Coordinate: -121.635
North Bounding Coordinate: 45.4724
South Bounding Coordinate: 44.8743

Keywords:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Earthquake hazard
Theme Keyword: Landslide
Theme Keyword: Ground shaking amplification
Theme Keyword: Liquefaction
Theme Keyword: Slope instability
Theme Keyword: Historic landslides
Theme Keyword: Seismic hazard

Place:

Place Keyword Thesaurus: None
Place Keyword: Oregon
Place Keyword: Clackamas County

Access Constraints: None
Use Constraints:
The spatial files that accompany this report can be used to create maps depicting various earthquake/landslide hazard zones. Bear in mind that the hazard zones are based on limited geologic and geophysical data, along with other constraints, as described in DOGAMI's publication: R. Jon Hofmeister, Carol S. Hasenberg, Ian P. Madin, and Yumei Wang, 2003, Earthquake and Landslide Hazard Maps and Future Earthquake Damage Estimates for Clackamas County, Oregon: Oregon Department of Geology and Mineral Industries Interpretative Open-File Report O-03-10. Any hazard map created from the spatial data or derivatives thereof is not a substitute for site-specific investigations by qualified practitioners. At any point in the mapped area, site-specific data may give results that differ from the digital data depicited on a hazard map. Some appropriate uses for the spatial data are discussed in the text. The user is responsible for the appropriate use of this data.
Point of Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Oregon Department of Geology and Mineral Industries
Contact Person: R. Jon Hofmeister

Contact Position: Geotechnical Engineer
Contact Voice Telephone: 503/731-4100 x243
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: jon.hofmeister@dogami.state.or.us
Contact Instructions: Please DOGAMI for assistance.

Data Set Credit: Oregon Department of Geology and Mineral Industries for creation of the spatial data sets.
Security Information:

Security Classification System: None
Security Classification: Unclassified
Security Handling Description: None

Native Data Set Environment:
MapInfo GIS .tab format, MapInfo Corp., Troy, NY
MapInfo® Native Table consists of files with following suffixes:

.TAB: table structure in ASCII format (required)
.DAT: table date storage in binary format (required)
.MAP: storage of map objects in binary format (optional)
.ID: links to the .map file (optional, but required if .map file exists)

Cross Reference:

Citation Information:

Originator:
R. Jon Hofmeister, Ian P. Madin, and Yumei Wang, Department of Geology and Mineral Industries, Portland, Oregon
Carol S. Hasenberg, Civil Engineering Department, Portland State University, Portland, Oregon

Publication Date: 10/31/2003
Publication Time: Unknown
Title: OFR O-03-10, Earthquake and Landslide Hazard Maps and Future Damage Estimates for Clackamas County, Oregon
Edition: 1.0
Geospatial Data Presentation Form: Vector
Series Information:

Series Name: Open-File Report
Issue Identification: O-03-10

Publication Information:

Publication Place: Portland, Oregon
Publisher: Oregon Department of Geology and Mineral Industries

Other Citation Details:
A map showing relative earthquake hazards in Clackamas County is shown in DOGAMI's publication, Open-File Report OFR O-03-09, 2003, Relative Earthquake and Landslide Hazards in Clackamas County. Together with a relative earthquake hazard map, single hazard maps for ground shaking amplification, liquefaction, and slope instability within the same county are also included. The purpose of the map is to characterize those areas just in Clackamas County where further on-the-ground investigation is prudent prior to land management and development activities.

A county-level, polygon-based ESRI ArcView shapefile is the basis for the relative earthquake hazards used to prepare this map. The shapefile contains polygons representing areas having tendencies to experience damage due to any combination of the following hazards: liquefaction, ground shaking amplification, or slope instability. Questions regarding the process for deriving the polygons should be directed to Clackamas County Geographic Information Systems, a division of the Information Service Department.

Attribute Accuracy:

Attribute Accuracy Report: Unknown

Logical Consistency Report: Spatial data is presented in the form of polygons that delineate earthquake and landslide hazard zones in Clackamas County, Oregon. This dataset does not have topology.
Completeness Report: The text and accompanying spatial dataset is available for Clackamas County, Oregon and designed to identify areas subject to future earthquake damage in the same county.
Positional Accuracy:

Horizontal Positional Accuracy:

Horizontal Positional Accuracy Report: The map data are intended to be used at a scale of 1:24,000, and the hazard information is stored at the original 10-meter DEM (digital elevation model) spacing.
Quantitative Horizontal Positional Accuracy Assessment:

Horizontal Positional Accuracy Value: 10
Horizontal Positional Accuracy Explanation: U.S. Geological Survey National Map Accuracy Standard for 1:24,000 scale topographic quadrangle maps.

Lineage:

Source Information:

Source Citation:

Citation Information:

Originator:
R. Jon Hofmeister, Ian P. Madin, and Yumei Wang, Department of Geology and Mineral Industries, Portland, Oregon
Carol S. Hasenberg, Civil Engineering Department, Portland State University, Portland, Oregon

Publication Date: 10/31/2003
Publication Time: Unknown
Title: OFR-03-10, Earthquake and Landslide Hazard Maps and Future Earthquake Damage Estimates for Clackamas County, Oregon
Edition: 1.0
Geospatial Data Presentation Form: Vector
Series Information:

Series Name: Open-File Report
Issue Identification: O-03-10

Publication Information:

Publication Place: Portland, Oregon
Publisher: Oregon Department of Geology and Mineral Industries

Other Citation Details:
A map showing relative earthquake hazards in Clackamas County is shown in DOGAMI's publication, Open-File Report OFR O-03-09, 2003, Relative Earthquake and Landslide Hazards in Clackamas County. Together with a relative earthquake hazard map, single hazard maps for ground shaking amplification, liquefaction, and slope instability within the same county are also included. The purpose of the map is to characterize those areas just in Clackamas County where further on-the-ground investigation is prudent prior to land management and development activities.

A county-level, polygon-based ESRI ArcView shapefile is the basis for the relative earthquake hazards. The shapefile contains polygons representing areas having tendencies to experience damage due to any combination of the following hazards: liquefaction, ground shaking amplification, or slope instability. Questions regarding the process for deriving the polygons should be directed to Clackamas County Geographic Information Systems, a division of the Information Service Department.

Source Time Period of Content:

Time Period Information:

Single Date/Time:

Calendar Date: 10/31/2003
Time of Day: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: OFR O-03-10
Source Contribution: The text accompanying OFR O-03-10 describes the GIS model, calibrations, and limited field evaluations used to derive the polygons, and contains a listing of references.

Process Step:

Process Description:
Gound Shaking Amplification

The spatial dataset for ground shaking amplication map was based generally on the NEHRP 1997 method of catagorizing relative hazards. With the available information compiled, NEHRP 1997 susceptibility classes were assigned based on the dominant lithologies for each geologic unit in the study area, checked source data boundaries, and simplified the GIS outputs into relative hazard classes: Low, Moderate, and High.

Liquefaction

Liquefaction hazards were assessed using a classification system developed by Youd and Perkins (1978). The steps used to develop the liquefaction hazard dataset and original data sources are listed in full in Appendix A of the text. Liquefaction susceptibility classes were assigned based on the dominant lithologies for each geologic unit in the study area, checked source data boundaries, and simplified the GIS outputs into four relative hazard classes: None/Very Low, Low, Moderate, and High.

Landslide Hazard Maps (two types)

Historic Landslides: A GIS compilation of historic landslide areas derived from published geologic reports and geohazards studies. Sources for the compilation of historic landslide areas are: Schlicker and Finlayson (1979), Hampton (1972), Orr and Miller (1986), Madin (1994), Sherrod and Scott (1995), Tolan and Beeson (1999), Miller and Orr (1984a, b), unpublished data from Leonard Orzol at the U.S. Geological Survey, and the Mt. Hood National Forest "Landslide" "Earthflow" and "Landform" layers available at http://www.reo.gov/mth/mth_data_www.htm. The methods employed to identify historic slide areas in these studies included such things as aerial photograph assessments, topographic map interpretations, and limited field reconnaissance. Using these sources, we simply used GIS operations to select areas mapped as landslide deposits and/or digitized the original maps to develop the database of known landslide areas.

Known Landslide Locations: A GIS database of known landslide locations (point and polyline features) derived from previous DOGAMI compilation efforts following the major 1996 and 1997 Oregon storm events (Hofmeister, 2000).

Regional Landslide Hazards

A regional landslide hazard map distinguishes different areas based on the simple combination of slope gradient derived from a 10-meter Digital Elevation Model (DEM) and geologic material strength, an approach similar to the Wilson and Keefer (1985) methodology employed within HAZUS. (Table 3 in the report was developed specifically for this project, and reflects the structure of the Wilson and Keefer (1985) method employed within HAZUS.) Geologic material strength was inferred from soil unit mapping by the USDA Natural Resource Conservation Service (USDA, 1981) and the USDA Forest Service (USDA, 1979). The units from these two sources were grouped into three simple classes: Low, Medium, and High; based on the unit characteristics identified in the soils reports and our comparisons with other landslide hazard information available for portions of the county (Mabey and others, 1997; Brunengo, 1978; Schlicker and Finlayson, 1979; Beaulieu, 1974; Madin and Wang, 1999a, b; Burns and others, 1998; Hofmeister, 2000; Walker and Duncan, 1989; Mt. Hood GIS data available at http://www.reo.gov/mth/mth_data_www.htm). Hazard classes of None, Low, Moderate, High, and Very High were derived from the combination of the slope map and the material type categories.

Process Date: 10/31/2003
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Oregon Department of Geology and Mineral Industries
Contact Person: R. Jon Hofmeister

Contact Position: Geotechnical Engineer
Contact Voice Telephone: 503/731-4100 x243
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: jon.hofmeister@dogami.state.or.us
Contact Instructions: Please DOGAMI for assistance.

Cloud Cover: Unknown

Direct Spatial Reference Method: Vector

Horizontal Coordinate System Definition:

Planar:

Grid Coordinate System:

Grid Coordinate System Name: State Plane Coordinate System 1983
State Plane Coordinate System:

SPCS Zone Identifier: 3601
Lambert Conformal Conic:

Standard Parallel: 44.3333333333
Standard Parallel: 46
Longitude of Central Meridian: -120.5
Latitude of Projection Origin: 43.6666666667
False Easting: 8202099.738
False Northing: 0

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:

Abscissa Resolution: 0.001
Ordinate Resolution: 0.001

Planar Distance Units: international feet

Geodetic Model:

Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.257

Vertical Coordinate System Definition:

Altitude System Definition:

Altitude Datum Name: National Geodetic Vertical Datum of 1929

Detailed Description:

Entity Type:

Entity Type Label: GSA
Entity Type Definition: Polygon feature and attribute table
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Attribute:

Attribute Label: GSA_Hazard
Attribute Definition:
Ground Shaking Amplification: Some soil types cause the earthquake waves to amplify, causing increased shaking and damage. The risk of amplification decreases when you are on bedrock, like the basalt that covers much of Oregon, and increases when you are on certain fine-grained soils. In some cases, these soils will also liquefy.
Attribute Definition Source: Oregon Department of Geology and Mineral Industries
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: Low
Enumerated Domain Value Definition: Low amplification hazard: Hazard zones are based on the degree to which ground shaking from a given earthquake is likely to be amplified.
Enumerated Domain Value Definition Source: Oregon Department of Geology and Mineral Industries
Enumerated Domain Value: Moderate
Enumerated Domain Value Definition: Moderate amplification hazard: Hazard zones are based on the degree to which ground shaking from a given earthquake is likely to be amplified.
Enumerated Domain Value Definition Source: Oregon Department of Geology and Mineral Industries
Enumerated Domain Value: High
Enumerated Domain Value Definition: Highest amplification hazard: Hazard zones are based on the degree to which ground shaking from a given earthquake is likely to be amplified.
Enumerated Domain Value Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: LSHazGridC
Entity Type Definition: The relative hazard map depicts locations of higher and lower relative hazard at 10-meter grid spacing based on general material type and slope. Text file.
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: Liquefaction
Entity Type Definition: Polygon feature and attribute table
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Attribute:

Attribute Label: Liq_hazard
Attribute Definition:
Liquefaction: Certain types of fine-grained, unconsolidated soils behave like a liquid during an earthquake, and cannot support buildings. Liquefaction is a major source of damage. These soils are particularly prevalent along flood plains and on land that was artificially filled before construction.
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: None/very low
Enumerated Domain Value Definition: No liquefaction hazard
Enumerated Domain Value Definition Source: Oregon Department of Geology and Mineral Industries
Enumerated Domain Value: Low
Enumerated Domain Value Definition: Low liquefaction hazard
Enumerated Domain Value Definition Source: Oregon Department of Geology and Mineral Industries
Enumerated Domain Value: Moderate
Enumerated Domain Value Definition: Moderate liquefaction hazard
Enumerated Domain Value Definition Source: Oregon Department of Geology and Mineral Industries
Enumerated Domain Value: High
Enumerated Domain Value Definition: High liquefaction hazard
Enumerated Domain Value Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: LSPolys
Entity Type Definition: Polygon feature and attribute table for Historical Landslides
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Attribute:

Attribute Label: DESCRIPTION
Attribute Definition: Definition for Unit
Attribute Definition Source: SOURCE_PUB

Attribute:

Attribute Label: ID
Attribute Definition: Unique integar that identifies the polygon
Attribute Definition Source: Computer generated
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: Integar
Enumerated Domain Value Definition: Unique identifier
Enumerated Domain Value Definition Source: Automatically assigned

Attribute:

Attribute Label: SOURCE_PUB
Attribute Definition: Publication sources for designation of the geologic material.

Attribute:

Attribute Label: UNIT
Attribute Definition: Classification of slide
Attribute Definition Source: From SOURCE_PUB
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: Qls
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: M
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: L
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: H
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: M
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: X
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: ALD
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: ALA
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: L
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: AL
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: D
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: A
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: DL
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB
Enumerated Domain Value: LD
Enumerated Domain Value Definition: None
Enumerated Domain Value Definition Source: SOURCE_PUB

Detailed Description:

Entity Type:

Entity Type Label: Lslocations
Entity Type Definition: Point and polyline feature and attribute table
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Overview Description:

Entity and Attribute Overview:
See accompanying report for methodology used to calculate the earthquake and landslide hazard zones and references cited. The following geospatial data files are included with the report: Ground shaking amplification hazards - GSA.tab; Liquefaction hazard areas - Liquefaction.tab; Individual landslide impact locations - Lslocations.tab; Historic landslide areas - LSPolys.tab. These files are in vector format and spatially referenced to the Oregon State Plane Coordinate System, North Zone, NAD83, international feet. The regional landslide hazards for Clackamas County is an ASCII grid formatted raster - LSHazGridC.txt, projected in the UTM zone 10, NAD27, meters.
Entity and Attribute Detail Citation: For detailed attribute information contact the Oregon Department of Geology and Mineral Industries

Distributor:

Contact Information:

Contact Person Primary:

Contact Person: Donald Haines
Contact Organization: Nature of the Northwest Information Center

Contact Position: Manager
Contact Address:

Address Type: Mailing and physical address
Address: 800 NE Oregon Street #5
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Address:

Address Type: mailing and physical address
Address: 800 NE Oregon Street
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Voice Telephone: 503/872-2750
Contact TDD/TTY Telephone: Unavailable
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: don.haines@state.or.us
Hours of Service: 8:00 a.m. to 4:30 p.m. Monday through Friday
Contact Instructions: Contact Nature of the Northwest Information Center by e-mail, phone, or letter explaining what products are needed.

Resource Description: Geohazards
Distribution Liability:
No warranty, expressed or implied is made regarding the accuracy or utility of the data described and/or contained herein, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The Oregon Department of Geology and Mineral Industries shall not be held liable for improper or incorrect use of these data.
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: .tab
Format Version Number: MapInfo 7.0

Fees: $10 for CD
Ordering Instructions:
Ordering capability is available through Nature of the Northwest Information Center, 800 NE Oregon Street #5, Portland, Oregon 97232, (503) 872-2750 and a publication list is viewable at: http:/www.naturenw.org
Standard Order Process:

Non-digital Form: DOGAMI can make a paper copy of the report (printed B/W). Also, a paper plot of the OFR O-03-09 can be ordered through the Nature of the Northwest Information Center, a fee of $15 will be charged.
Fees: $10 for CD
Ordering Instructions:
Ordering capability is available through Nature of the Northwest Information Center, 800 NE Oregon Street #5, Portland, Oregon 97232, (503) 872-2750 and a publication list is viewable at: http:/www.naturenw.org
Custom Order Process: Contact The Nature of the Northwest Information Center by e-mail, phone, or letter explaining what products are needed.
Technical Prerequisites:
The digital map files are in vector form and are available in two formats:

(1) .tab - native file format of MapInfo GIS software package by MapInfo Corporation of Troy, New York.
(2) .shp - native file format of ArcView GIS software package by ESRI, Redlands, California.

Publication viewer files

Included on this CD is a text viewing file in Adobe Acrobat portable document format (.pdf). A free Adobe Acrobat Reader can be obtained from Adobe Systems Inc., San Jose, CA. http://www.adobe.com

Data viewing

Map data files can be viewed with a variety of software systems. For the vector map data, both program manufacturers currently offer viewer software that can be downloaded free:

http://www.esri.com/software/arcexplorer/index.html
http://www.mapinfo.com/software/proviewer/index.html

Available Time Period:

Time Period Information:

Multiple Dates/Times:

Single Date/Time:

Calendar Date: 10/31/2003
Time of Day: Unknown

Metadata Date: 10/31/2003
Metadata Review Date:
Metadata Future Review Date:
Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: Clark Niewendorp
Contact Organization: Oregon Department of Geology and Mineral Industries

Contact Position: Cartographer
Contact Address:

Address Type: mailing and physical address
Address: 800 NE Oregon Street #5, Suite 965
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Voice Telephone: 503/731-4100 x219
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: clark.niewendorp@state.or.us
Hours of Service: 7:30 a.m. to 4:30 p.m. Monday through Friday

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: 2
Metadata Time Convention: local time
Metadata Access Constraints: None
Metadata Use Constraints: None
Metadata Security Information:

Metadata Security Classification System: None
Metadata Security Classification: Unclassified
Metadata Security Handling Description: None