Identification_Information: Citation: Citation_Information: Originator: Oregon Department of Geology and Mineral Industries Publication_Date: Unknown Publication_Time: Unknown Title: SLIDOv1 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Statewide Landslide Information Database of Oregon (SLIDO) Release 1 Issue_Identification: SLIDO Release 1 Publication_Information: Publication_Place: Portland, Oregon Publisher: Oregon Department of Geology and Mineral Industries Other_Citation_Details: Public domain. Online_Linkage: \\rocks\staff-public\Publications\NEW publications\FINAL COPY\SLIDO-1\for CD\GIS Files\SLIDOv1.shp Larger_Work_Citation: Citation_Information: Series_Information: Series_Name: REQUIRED - wite out series name: Open-File Report, etc. Issue_Identification: REQUIRED - use IMS, OFR, GMS, etc. Publication_Information: Publication_Place: Portland, Oregon Publisher: Oregon Department of Geology and Mineral Industries Description: Abstract: One of the primary chronic and most devastating geologic hazards in Oregon is landslides. Average annual repair costs for landslides in Oregon exceed $10 million and severe winter storm losses can exceed $100 million (Wang and others, 2002). As population growth continues to expand and development into increased landslide susceptible terrain occurs, greater losses are likely to result (Figure 1). In order to begin reducing losses from landslides, large-scale endeavors are necessary at all community levels from state government to individual family homes. One successful way to reduce losses from landslides is through pre-disaster mitigation, which can be performed at many scales from statewide to local. To begin pre-disaster mitigation of landslides, the landslide hazard must be located (Figure 1). Once the hazard is located the population and infrastructure vulnerable to the hazards can be identified and the risk mitigated. In order to improve our understanding of the landslide hazard in Oregon and to create a statewide base level of landslide data, this database of mapped landslides, the Statewide Landslide Information Database of Oregon (SLIDO) was created. The four main objectives of this study were 1) identify previously mapped landslide deposits statewide, 2) improve the understanding of landslide hazards throughout Oregon, 3) improve the abilities of communities to begin effective landslide management and risk reduction activities, and 4) recommend future improvements and updates to the database. The resulting database includes more than 15,000 landslide and landslide related features (polygons) extracted from 257 published and non-published studies. The original studies vary widely in scale, scope and focus which is reflected in a wide range in the accuracy, detail and completeness with which landslides are mapped. Purpose: In order to improve our understanding of the landslide hazard in Oregon and to create a statewide base level of landslide data, this database of mapped landslides, the Statewide Landslide Information Database of Oregon (SLIDO) was created. The four main objectives of this study were 1) identify previously mapped landslide deposits statewide, 2) improve the understanding of landslide hazards throughout Oregon, 3) improve the abilities of communities to begin effective landslide management and risk reduction activities, and 4) recommend future improvements and updates to the database. Supplemental_Information: The resulting database includes more than 15,000 landslide and landslide related features (polygons) extracted from 257 published and non-published studies. The original studies vary widely in scale, scope and focus which is reflected in a wide range in the accuracy, detail and completeness with which landslides are mapped. SLIDO was created through the compilation of the best data available. Several limitations are worth noting, and underscore that any hazard map is generally useful for regional applications but should not be used as an alternative to site-specific studies in critical areas. 1. Although it every effort was made to ensure that digitization and database entry were accurate and complete, no effort was made to verify the original data on which the compilation is based. Geologic data in the less populated eastern portions of the state were particularly limited in terms of scale, for example the 1:500,000 scale geologic map of the state was used in some locations. 2. As previously discussed, the developed database is from original sources that vary in scale, original purpose of mapping, available tools at the time of mapping, and background and interpretation by original mapper. These factors all affect the level of detail and accuracy of the landslides. 4. We neither collected, nor analyzed any new data to create this map. Therefore, this database is a snapshot view of the current data. Results of a recent study by DOGAMI and USGS geologists in a small study area in the Portland Hills (60 km2) found roughly 200 landslides using a LIDAR derived high resolution DEM (Table 3). The same area also has roughly 300 mapped landslide points in the 1996-1997 storm event inventories. SLIDO release-1 has roughly 50 landslides located in this same area, roughly 10 of which are from 1:24,000 scale geologic maps and roughly 40 from landslide specific mapping done in the 70's. Since this area (the small study area in the Portland Hills) of SLIDO release-1 was compiled from geologic mapping done at a relatively small scale, and other mapping performed specifically to locate landslides, the area is likely one of the areas that should be considered to have higher accuracy with regard to landslides. The number of landslides in SLIDO release-1 within this small study area, compared to the LIDAR mapping would be roughly 25%. Therefore, this percentage (~25%) should be considered an upper value of accuracy of SLIDO release-1 for most areas, except for the previously mentioned new landslide specific mapping (Lincoln County Coast and City of Oregon City) recently completed by DOGAMI. In conclusion, most of SLIDO release-1 should be considered to have located between 0% - 25% of the actual landslides at any location. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: unknown Currentness_Reference: publication date Status: Progress: Planned Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -124.801620 East_Bounding_Coordinate: -116.406080 North_Bounding_Coordinate: 46.274057 South_Bounding_Coordinate: 41.926115 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Landslide Theme_Keyword: Oregon Theme_Keyword: GIS Database Theme_Keyword: Statewide Theme_Keyword: SLIDO Place: Place_Keyword: Oregon Place_Keyword: Statewide Access_Constraints: DOGAMI makes no warranty as to the currency, completeness, accuracy or utility of any specific data. 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. Use_Constraints: Restrictions and legal prerequisites for using the data set after use is granted. These include any access constraints applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations on using the data set. For example: Maps in this publication depict ???. The maps cannot serve as a substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from those shown on the maps. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: William J. Burns Contact_Organization: Oregon Department of Geology and Mineral Industries Contact_Position: Engineering Geologist Contact_Address: Address_Type: mailing and physical address Contact_Voice_Telephone: 971-673-1538 Contact_Facsimile_Telephone: 971-673-1562 Contact_Electronic_Mail_Address: bill.burns@dogami.state.or.us Browse_Graphic: Browse_Graphic_File_Name: SLIDO Release 1 Data_Set_Credit: Recognition of those who contributed to the data set. Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attribute accuracy is very good for both the spatial and tabular databases. Numerous queries were run to check accuracy and consistency of attribute information. Queries were run separately and to compare the data sets against each other. An iterative process was run to find discrepancies and then corrections were made to the respective data sets to achieve consistency. Logical_Consistency_Report: MapInfo Professional version 8.0 does not establish data set topology. This version of MapInfo can check regions (polygons) for misalignment errors such as gaps (slivers), polygon overlaps, self intersections, and duplicate nodes. If found, these errors were corrected. Completeness_Report: This digital dataset delineates the landslides throguhout Oregon. The data is an integration of 257 original reference geologic maps. A data structure was developed that preserves the original interpretations of each mapper. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal positional accuracy of this data equates to the original reference map scale. The range of map scales used varies from 1:24,000 to 1:500,000. This data set is predominantly the result of many raster-to-vector (R2V) data conversions performed on scanned images of paper maps. Raster scanning of paper maps and the R2V process introduce some horizontal accuracy displacement. This displacement has not been quantified. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: not available Lineage: Source_Information: Source_Contribution: See report text. Process_Step: Process_Description: See report text for details. In general: Paper or stable-based film copies of original reference geologic maps were collected. Examination was made to ensure each original map had adequate map control information to allow successful georeferencing. Maps were scanned (color or grayscale) at 300 dots per inch and provided as tagged image format (tiff) files. Georeferencing was performed with Blue Marble Geographics Geographic Transformer. This software allows entering numerous points to establish the basis for assigning world coordinates to the image coordinates. The software calculates error on the fly, and all maps were processed with a tolerance of 1 pixel error. In the processing, each map was projected with the same software into the Oregon Lambert Projection. A decision was made regarding whether the map would be digitized 'heads-up' or go through further processing in a raster-to-vector program. Able Software Co. R2V software was used for conversion. While some map images could be processed directly in R2V, most maps were traced onto mylar. The mylar was then scanned, georeferenced and projected. The resulting image was then processed in R2V to yield linework. Linework inspection was done to determine completeness and accuracy. Finally, the linework was processed by a polygon building utility that runs in the MapInfo Professional GIS software. Polygon and line attributing were then performed, with the resulting file appended into a master polygon file and separate fault line file and fold line file. Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: C:\Documents and Settings\deb schueller\Desktop\metadata-how-to\DOGAMI_General_Metadata_Template.xml Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: E:\Bill_DOGAMI_General_Metadata.xml Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: S:\SLIDO - Statewide Landslide Information Database of Oregon\SLIDO Release 1 - Submit to Pubs\SLIDO version 1 - Resubmit to Pubs\Metadata\metadata.xml Process_Step: Process_Description: Dataset copied. Source_Used_Citation_Abbreviation: S:\SLIDO - Statewide Landslide Information Database of Oregon\SLIDOv1 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 15093 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Lambert Conformal Conic Lambert_Conformal_Conic: Standard_Parallel: 43.000000 Standard_Parallel: 45.500000 Longitude_of_Central_Meridian: -120.500000 Latitude_of_Projection_Origin: 41.750000 False_Easting: 1312335.958005 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000000 Ordinate_Resolution: 0.000000 Planar_Distance_Units: international feet Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: SLIDOv1 Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: ID Attribute: Attribute_Label: REF_ID_COD Attribute: Attribute_Label: UNIQUE_ID Attribute: Attribute_Label: MAP_UNIT_L Attribute: Attribute_Label: Shape_Leng Attribute: Attribute_Label: Shape_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: Descrip Overview_Description: Entity_and_Attribute_Overview: Detailed summary of the information contained in a data set. Entity_and_Attribute_Detail_Citation: Reference to the complete description of the entity types, attributes, and attribute values for the data set. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Nature of the Northwest Information Center Contact_Person: Donald Haines Contact_Position: Manager Contact_Address: Address_Type: physical address Address: 800 N.E. Oregon Street, Suite 177 City: Portland State_or_Province: OR Postal_Code: 97232 Country: USA Contact_Voice_Telephone: 503-872-2750 Contact_Facsimile_Telephone: 971-673-1562 Contact_Electronic_Mail_Address: don.haines@dogami.state.or.us Hours_of_Service: 9 am to 5 pm PST Resource_Description: Spatial data files available in shape file (.shp) format (ESRI). 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: Transfer_Size: 13.767 Fees: $25 Turnaround: One week Technical_Prerequisites: Geographic Information System software Metadata_Reference_Information: Metadata_Date: 20080626 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: William J. Burns Contact_Organization: Oregon Department of Geology and Mineral Industries Contact_Position: Engineering Geologist Contact_Address: Address_Type: mailing and physical address Contact_Voice_Telephone: 971-673-1538 Contact_Facsimile_Telephone: 971-673-1562 Contact_Electronic_Mail_Address: bill.burns@dogami.state.or.us Hours_of_Service: 8:30 am to 4:30 pm PST Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Profile_Name: TNC Metadata Profile (pending) Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile