Landslide geomorphology of Oregon City and vicinity interpreted from LiDAR imagery and aerial photographs (pre-release issue)

Citation:

Citation Information:

Originator: Madin, Ian P. and Burns, William J., Oregon Department of Geology and Mineral Industries
Publication Date: 20060929
Title: Landslide geomorphology of Oregon City and vicinity interpreted from LiDAR imagery and aerial photographs (pre-release issue)
Geospatial Data Presentation Form: vector digital data
Series Information:

Series Name: Open File Report
Issue Identification: O-06-27

Publication Information:

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

Description:

Abstract:
New information regarding potential landslide hazards in Oregon City, Oregon is presented. Source data include a recently completed geologic map of the Oregon City, OR 7½' quadrangle and high resolution topographic data derived from Light Detection and Ranging (LiDAR) surveys.
Purpose: To provide timely access to new information about potential landslide hazards in the Oregon City, Oregon area.
Supplemental Information:
The information in this report will be included in a future publication of the Oregon Department of Geology and Mineral Industries. The publication will be in the Geological Map Series, to be issued as GMS-119 (in press).
Time Period of Content:

Currentness Reference: ground condition

Status:

Progress: Complete
Maintenance and Update Frequency: None planned

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -122.655
East Bounding Coordinate: -122.499
North Bounding Coordinate: 45.3895
South Bounding Coordinate: 45.2496

Keywords:

Theme:

Theme Keyword Thesaurus: AGI Glossary of Geology
Theme Keyword: Geologic hazard
Theme Keyword: Debris flow
Theme Keyword: LiDAR

Place:

Place Keyword Thesaurus: Oregon
Place Keyword: Clackamas County
Place Keyword: Oregon City

Access Constraints: None
Use Constraints:
The areas identified in this study as landslide topography are not necessarily hazardous, as some areas may have been erroneously interpreted, and other properly interpreted areas may now be stable. These landslide topography areas should be carefully evaluated for landslide hazards on a site-specific basis to establish the exact level of hazard.
Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: Ian P. Madin
Contact Organization: Oregon Department of Geology and Mineral Industries

Contact Position: Chief Scientist
Contact Voice Telephone: 971 673-1542
Contact Facsimile Telephone: 971 673-1562
Contact Electronic Mail Address: Ian.P.Madin@dogami.state.or.us

Data Set Credit: Ian P. Madin
Security Information:

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

Native Data Set Environment: MapInfo GIS

Attribute Accuracy:

Attribute Accuracy Report: Unknown

Logical Consistency Report: Polygon topology has not been checked for this release.
Completeness Report: Data set is complete for the Oregon City, OR area and adjacent areas within available LiDAR data extent.
Lineage:

Source Information:

Source Citation Abbreviation: Aerial photograph stereo pairs
Source Contribution: A time series of air photos was examined (1939, 1948, 1956, 1964, 1973, 1980, 1990, 2000).

Source Information:

Source Citation Abbreviation: High resolution bare earth Light Detection and Ranging (LiDAR) survey data
Source Contribution: Digital Elevation Model grids were produced from the LiDAR data.

Process Step:

Process Description:
For all of the photo series, stereo photo pairs were examined to look for topography characteristic of landslides. The outlines of areas of landslide topography were transferred from the stereo photos into a Geographic Information System by heads up digitization. Polygons of landslide outlines were delineated using U.S. Geological Survey Digital Raster Graphic files of 7.½' quadrangles.
Process Step:

Process Description:
The DEM grids with 5 foot cell size were visualized with hillshading technique and production of slope maps to highlight subtle topography. Additionally, 2 foot contours were developed from the LiDAR data to assist in visualization.

Direct Spatial Reference Method: Vector
Point and Vector Object Information:

SDTS Terms Description:

SDTS Point and Vector Object Type: G-polygon

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: 44.33
Standard Parallel: 46
Longitude of Central Meridian: -120.5
Latitude of Projection Origin: 43.66
False Easting: 8202083.333
False Northing: 0

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Planar Distance Units: survey 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

Overview Description:

Entity and Attribute Overview: For a complete description of the polygon attributes, please see the text accompanying this data.
Entity and Attribute Detail Citation: Open File Report O-06-27, published by the Oregon Department of Geology and Mineral Industries, Portland, OR.

Distributor:

Contact Information:

Contact Person Primary:

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

Contact Position: Information Center Manager
Contact Address:

Address Type: physical address
Address: 800 NE Oregon St., Ste. 177
City: Portland
State or Province: OR
Postal Code: 97232

Contact Voice Telephone: 503-872-2750
Contact Facsimile Telephone: 971 673-1562
Contact Electronic Mail Address: don.haines@dogami.state.or.us

Resource Description: Geographic Information System (GIS) vector data set and accompanying text.
Distribution Liability:
Although these data have been processed successfully on a computer system at the Oregon Department of Geology and Mineral Industries (DOGAMI), no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, 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 these data are directly acquired from DOGAMI, and not indirectly through other sources which may have changed the data in some way. It is also 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 the data described and/or contained herein.

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: MapInfo
Format Version Number: 8.0
Format Specification: native MapInfo table (.tab)
Format Information Content: Polygon files
File Decompression Technique: none

Digital Transfer Option:

Offline Option:

Offline Media: CD-ROM

Digital Form:

Digital Transfer Information:

Format Name: ArcView
Format Version Number: 3.3
Format Specification: native ArcView shape (.shp)
Format Information Content: Polygon files
File Decompression Technique: none

Digital Transfer Option:

Offline Option:

Offline Media: CD-ROM

Fees: $10

Custom Order Process: none
Technical Prerequisites: GIS software or GIS data viewing software.

Metadata Date: 9/29/2006
Metadata Review Date:
Metadata Future Review Date:
Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: Paul Staub
Contact Organization: Oregon Department of Geology & Mineral Industries

Contact Position: Spatial Data Specialist
Contact Address:

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

Contact Voice Telephone: 971 673-1548
Contact Facsimile Telephone: 971 673-1562
Contact Electronic Mail Address: Paul.Staub@dogami.state.or.us
Hours of Service: 8:30-5:30

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
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