File: ..\gis1\hazards\geology\alquist\mergedmgp.shp Description: Alquist Priolo Zones for Humboldt County. See original metadata file below. Creation Date: June 2003 Produced By: Chinmaya Lewis Data Type: ArcView Shapefile polygon Projection: CA State Plane Zone 1 Datum: North American Datum 1927 Starting Product and Date: h:\gis1\hazards\geology\alquist\Humboldt Original Data Source: California Department of Conservation, California Geologic Survey. GIS Files of Official Alquist-Priolo Earthquake Fault Zones. CGS CD 2001-06, 2002. Original Data Scale: Unknown Updates/History/Corrections: Quad tiles for CGS were merged into one shapefile. Tiles for Arcata North, Arcata South, Fields Landing, Fortuna, Hydesville, Korbel, Shelter cove, and Trinidad. Data was reprojected into State Plane coordinates. Accuracy: Warning/Data Limitations: see original metadata below. Comments: Contact Info: Chinmaya Lewis or Tom Howfweber Humboldt County Planning 3015 H St. Eureka, CA 95501 707-268-3737 E-mail: clewis@co.humboldt.ca.us ***************************************** California Department of Conservation, California Geological Survey Alquist-Priolo Earthquake Fault Evaluation and Zoning Program Metadata for Alquist-Priolo Earthquake Fault Zones Earthquake Fault Zone Map of the Arcata North Quadrangle File Name: ARCN_AP Table of Contents 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 Publication_Date: 2002 Publication_Time: Unknown Title: GIS files of Official Maps of Alquist-Priolo Earthquake Fault Zones, Northern and Eastern Region Series_Information: Series_Name: CD-ROM Issue_Identification: CGS CD 2001-06 Publication_Information: Publication_Place: Sacramento, CA Publisher: Department of Conservation, California Geological Survey Description: Abstract: This data set contains the Alquist-Priolo Earthquake Fault Zones and fault traces as shown on the Official Alquist-Priolo Earthquake Fault Zones Map of the Arcata North quadrangle. The dataset is comprised of polygons and lines that form regulatory zone boundaries (Alquist-Priolo Earthquake Fault Zones) and fault traces of areas where surface fault rupture previously has occurred, or where local topographic, geological, and geotechnical conditions indicate a potential for permanent ground displacements such that mitigation by avoidance as stated in Public Resources Code Section 2621.5 would be required. Purpose: This map will assist cities and counties in fulfilling their responsibility to prohibit the location of developments and structures for human occupancy across the trace of active faults as required by the Alquist-Priolo Earthquake Fault Zoning Act (Public Resources Code Sections 2621-2630). For information regarding the scope and recommended methods to be used in conducting the required site investigations, see DMG Special Publication 42, Fault-Rupture Hazard Zones in California. Supplemental_Information: This database can be used in conjunction with the published version of the Official Map of Earthquake Fault Zones, Arcata North Quadrangle. Also, digital raster graphic images are available for the Northern and Eastern Region (Digital Images of Official Maps of Alquist-Priolo Earthquake Fault Zones of California, Northern and Eastern Region, DMG CD 2000-05). These digital raster graphic image collections are available from the California Department of Conservation, California Geological Survey (CGS) by mail: P.O. Box 2980 Sacramento, CA 95812-2980 or by phone (916) 445-5716. These cd sets are also available from CGS offices in San Francisco (415) 904-7707 and Los Angeles (213) 239-0878. Faults shown are the basis for establishing the boundaries of the Earthquake Fault Zones. This database may not show all faults that have the potential for surface fault rupture, either within the Earthquake Fault Zones or outside their boundaries. The identification and location of these faults are based on the best available data. However, the quality of data used is varied. Fault traces have been drawn as accurately as possible at the map scale (1:24,000). This map does not shown Seismic Hazard Zones, if any, that may exist in this area. Please refer to the latest Official Maps of Seismic Hazard Zones for disclosures and other actions that are required by the Seismic Hazards Mapping Act. For more information on this subject see DMG Special Publication 117. Fault information on this map is not sufficient to serve as a substitute for the geologic site investigations required under Chapter 7.5 of Division 2 of the California Public Resources Code. Time_Period_of_Content Time_Period_Information Single_Date/Time Calendar_Date Currentness_Reference: publication date of original map 1983 Status Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain Bounding_Coordinates West_Bounding_Coordinate: -124.125 East_Bounding_Coordinate: -124.000 North_Bounding_Coordinate: 41.000 South_Bounding_Coordinate: 40.875 Keywords Theme Theme_Keyword_Thesaurus: None Theme_Keyword: Earthquake Fault Zone Map Theme_Keyword: earthquake hazard identification and mitigation Theme_Keyword: surface fault rupture Theme_Keyword: active fault Theme_Keyword: fault map Theme_Keyword: Alquist-Priolo Place Place_Keyword_Thesaurus: None Place_Keyword: City: Arcata Place_Keyword: County: Humboldt Place_Keyword: California Place_Keyword: USA Access_Constraints: Because digital data are easily altered, cities, counties, and others who use this file in their permit review and approval processes, or for other actions mandated by law (e.g., real estate disclosure at time of transfer) are advised to obtain the file directly from the Department of Conservation, California Geological Survey. Use_Constraints: LICENSE AGREEMENT: (c) 2002 California Department of Conservation, California Geological Survey. All rights reserved. No part of this CD-ROM may be reproduced, transmitted, or distributed in any form or by any means, electronic or mechanical for any purpose, without the express written permission of the California Geological Survey except under the following conditions: 1) Personal use; 2) For publication in a report, in unmodified form, cite on figure or in text as "Reproduced with permission, California Geological Survey from CD-ROM 2001-06 (2002), Official Map of Alquist-Priolo Earthquake Fault Zones, {name of} Quadrangle (19xx)", and (3) for publication in a report in modified form; cite on figure or in text as "Modified from California Geological Survey CD-ROM 2001-06 (2002), Official Map of Alquist-Priolo Earthquake Fault Zones, {name of} Quadrangle (19xx)". Point_of_Contact Contact_Information Contact_Person_Primary Contact_Person: William A. Bryant Contact_Organization: California Department of Conservation, California Geological Survey, Regional Geologic and Hazards Mapping Program Contact_Position: Program Manager Contact_Address Address_Type: mailing and physical address Address: 801 K Street, MS 12-32 City: Sacramento State: California Postal_Code: 95814-3531 Country: USA Contact_Voice_Telephone: (916) 323-9672 Contact_Facsimile_Telephone: (916) 322-4765 Contact_Electronic_Mail_Address: bbryant@consrv.ca.gov DATA QUALITY INFORMATION Attribute_Accuracy: Attribute_Accuracy_Report: Initial editing and final proofing were done by California Geological Survey staff. The attribute accuracy was tested by overlaying the original clear-film overlay on plots derived from the digital data to confirm match. Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Explanation: Original hardcopy EFZ maps were compiled over the past 25 years at a scale of 1:24,000. Digital EFZ files were created by scanning the original clear-film overlays (hardcopy maps) used to generate Official EFZ maps. The scanned images were then digitized on screen. Users of these digital files must recognize the difference between precision and accuracy. The digital data can be reproduced precisely at any scale, but the accuracy of the data remains constant. As the scale is increased from 1:24,000, uncertainty and errors in fault location and EFZ boundary and turning point locations remain the same. U.S. Geological Survey base map standards provide that 90 percent of cultural features be located within 40 feet (horizontal accuracy) at the scale of 1:24,000. Turning point locations were placed on the original hardcopy maps using the criteria of establishing the desired setback distance from the fault zone and using a readily identifiable feature on the ground. However, the turning points and connecting EFZ boundaries have not been surveyed to verify their mapped positions. For example, the center of the intersection between two streets is an ideal turning point because it is easily located on the ground. However, base map accuracy may not be better than ± 40 feet, so the digital latitude/longitude coordinates may not coincide with the actual center of the street intersection as determined by GPS or other surveying methods. In addition, the width of the EFZ boundary at 1:24,000 is about 25 feet. Therefore, the actual location of EFZ boundaries should be considered to be no better located than ± 50 feet. Logical_Consistency_Report: Dataset is consistent with the 1983 Official Map of Alquist-Priolo Earthquake Fault Zones for the Arcata North quadrangle. Completeness_Report: The dataset contains Alquist-Priolo Earthquake Fault Zones and faults as shown on the 1983 Official Map of Alquist-Priolo Earthquake Fault Zones for the Arcata North quadrangle. The topographic base map, which was included on the published map, is not included. Positional_Accuracy Horizontal_Positional_Accuracy Horizontal_Positional_Accuracy_Report: These data were input at the same scale as the published map, 1:24,000 or 1 inch equals 2,000 feet. U.S. Geological Survey base map standards provide that 90 percent of cultural features be located within 40 feet (horizontal accuracy) at the scale of 1:24,000. The identification and location of earthquake fault zones are based on available data. However, the quality of data used is varied. The information depicted has been drawn as accurately as possible at this map scale. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: California Department of Conservation, California Geological Survey Publication_Date: July 1, 1983 Publication_Time: Unknown Title: 1983 Official Map of Alquist-Priolo Earthquake Fault Zones for the Arcata North quadrangle Series_Information: Series_Name: Official Maps of Alquist-Priolo Earthquake Fault Zones Issue_Identification: Arcata North quadrangle Publication_Information: Publication_Place: Sacramento, California Publisher: California Department of Conservation, California Geological Survey Source_Scale_Denominator: 24,000 Type_of_Source_Media: stable-base material Source_Time_Period_of_Content: Time _Period_Information: Single_Date/Time: Calendar_Date: July 1, 1983 Time_of_Day: unknown Source_of_Currentness_Reference: publication date Process_Step: Process_Description: The original hardcopy maps (clear film overlays) used to reproduce Official Maps of Earthquake Fault Zones were the basis for developing these digital GIS files. Each hardcopy map was scanned at full scale using an Anatech large-format scanner. The scanned image was translated to cit file format, geo-referenced on screen, and was digitized using Microstation v. 5.0 software to create vector files in dgn format. The digital files were printed at 1:24,000 scale and compared with the original clear-film overlay for completeness and accuracy. These files were then converted to dxf format, using specific layers to display specific line-style data. The California State Plane Coordinate System (SPCS), North America Datum 1927, was used. For ease of importing these files to different GIS platforms, the line styles are separated into individual data layers: Layer 1: Corner registration tics for individual quadrangle map and most text data Layer 3: Corner registration tics for oversized quadrangle maps (not present for most maps) Layer 7: EFZ boundary polygons Layer 8: Solid lines (accurately located fault traces) Layer 9: Long dashed lines (approximately located fault traces) Layer 10: Short-dashed lines (inferred fault traces) Layer 11: Dotted lines (concealed fault traces). Layer 12: Thin dashed and dotted lines (aerial photo lineament) Process_Date: unknown Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: William A. Bryant Contact_Organization: California Department of Conservation, California Geological Survey Contact_Position: Senior Geologist Contact_Address: Address_Type: mailing and physical address Address: 801 K Street, MS 12-32 City: Sacramento State_or_Province: CA Postal_Code: 95814-3531 County: USA Contact_Voice_Telephone: (916) 323-9672 Contact_Facsimile_Telephone: (916) 322-4765 Contact_Electronic_Mail_Address: bbryant@consrv.ca.gov SPATIAL DATA ORGANIZATION INFORMATION Direct_Spatial_Reference_Method: Vector SPATIAL REFERENCE INFORMATION Horizontal_Coordinate_System_Definition Planar Grid_Coordinate_System Grid_Coordinate_System_Name: State Plane Coordinate System 1927 State_Plane_Coordinate_System SPCS_Zone_Identifier: California SPCS Zone 0401 Lambert_Conformal_Conic Standard_Parallel: 40.0000 Standard_Parallel: 41.6667 Longitude_of_Central_Meridian: -122.0 Latitude_of_Projection_Origin: 39.3333 False_Easting: 2000000.0 False_Northing: 0 Planar_Coordinate_Information Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation Abscissa_Resolution: .01 Ordinate_Resolution: .01 Planar_Distance_Units: U.S. survey feet Geodetic_Model Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clark 1866 Semi-major_Axis: 20925874.016 ft Denominator_of_Flattening_Ratio: 294.978698199999 ENTITY AND ATTRIBUTE INFORMATION Overview_Description: Entity_and_Attribute_Overview: Digital GIS files are provided as MAPINFO tab files, ESRI shape files, and dxf export files. The GIS files of AP EFZ maps contained in this CD are current as of April 2002. Please check the CGS website www.conservation.ca.gov/dmg for current information on new and revised EFZ maps. Original AP EFZ maps consist of a topographic base map (not included in this dataset) and a clear-film overlay containing turning points defining EFZ boundaries and fault traces used to establish the EFZ. Fault traces consist of five line types: Solid line: accurately located fault trace Long-dashed line: approximately located fault trace Short-dashed line: inferred fault trace Dotted line: concealed fault trace Query: indicates additional uncertainty Thin dashed and dotted line: aerial photo lineament (symbol generally not used after 1981) For ease of importing these files to different GIS platforms, the line styles are separated into individual data layers: Layer 1: Corner registration tics for individual quadrangle map and most text data Layer 3: Corner registration tics for oversized quadrangle maps (not present for most maps) Layer 7: EFZ boundary polygons Layer 8: Solid lines (accurately located fault traces) Layer 9: Long dashed lines (approximately located fault traces) Layer 10: Short-dashed lines (inferred fault traces) Layer 11: Dotted lines (concealed fault traces). Layer 12: Thin dashed and dotted lines (aerial photo lineament) DISTRIBUTION INFORMATION Distributor Contact_Information Contact_Organization_Primary Contact_Organization: California Department of Conservation, California Geological Survey Contact_Address Address_Type: mailing and physical address Address: P.O. Box 2980 City: Sacramento State: CA Postal_Code: 95812-2980 Contact_Voice_Telephone: (916 ) 445-5716 Hours_of_Service: Monday-Friday, 08:00-17:00, Pacific Time Resource_Description: Official Map of Earthquake Fault Zones for Arcata North Quadrangle Distribution_Liability: The data and software on this CD-ROM are provided by the California Department of Conservation, California Geological Survey, as is. Any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall the California Department of Conservation, California Geological Survey, or its associated contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) that arise in any way out of the use of these data and software, even if advised of the possibility of such damage. Although the data on this CD-ROM have been produced and processed by professional scientists and organizations, the California Department of Conservation, California Geological Survey, makes no warranty, express or implied, regarding the data or its use. It is recommended that careful attention be paid to the contents of any metadata associated with a specific file, and that the originator of the data be contacted with any questions regarding appropriate use. The California Department of Conservation, California Geological Survey, 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 dxf export Format_Version_Number: 5.5 Digital_Transfer_Option Offline_Option Offline_Media: CD-ROM Custom_Order_Process: This product can also be order by phone using VISA, MasterCard, or American Express or by mail w2ith check, money order or credit card through any CGS office. Available_Time_Period Time_Period_Information Single_Date/Time Calendar_Date __________________________________________________________________ METADATA REFERENCE INFORMATION Metadata_Date: 10/15/2001 Metadata_Review_Date: Metadata_Contact Contact_Information Contact_Person_Primary Contact_Person: William A. Bryant Contact_Organization: California Department of Conservation, California Geological Survey Contact_Position: Senior Geologist Contact_Address Address_Type: mailing and physical address Address: 801 K Street, MS 12-32 City: Sacramento State: CA Postal_Code: 95814-3531 Country: USA Contact_Voice_Telephone: (916) 323-9672 Contact_Facsimile_Telephone: (916) 322-4765 Contact_Electronic_Mail_Address: bbryant@consrv.ca.gov Hours_of_Service: 08:00-17:00, Monday-Friday Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata