Identifier: GEOMORPH Title: California North Coast Geomorphic Features - Private Forestlands Originator: California Department of Conservation, Division of Mines and Geology; California Department of Forestry and Fire Protection Edition: 1 Publication Date: 19981101 Information Spatial data Resource Type: Scale: 1:24,000 Other Citation Details: Map projection is Albers Equal Area, NAD27 Abstract: Geologic units and geomorphic features were mapped by the California Department of Conservation Division of Mines and Geology in the early 1980's, in cooperation with California Department of Forestry and Fire Protection, the Environmental Protection Agency, California Department of Water Resources, California Department of Parks and Recreation, California Department of Water Resources, and the State Water Resources Control Board. The mapping effort covered most North Coast private forestlands and included 60 7.5' quadrangles. The maps were digitized in cooperation with the California Department of Forestry and Fire Protection in the early 90's and are available in GIS format. As part of this project, two distinct product series were created, each with unique metadata: 1) geology 2) geomorphic features. Each product series contains GIS data layers, symbology layers and AML programs for map generation, and graphics (PDF) files for each quad. The graphics files show geologic units overlain on contours, public land survey, roads, and other features that were extracted from scanned 7.5' U.S. Geological Survey topographic maps. Browse Graphic: Each quadrangle map has a separate graphics file. These can be located at www.consrv.ca.gov/dmg/ws Purpose: The maps were originally created in response to the Clean Water Act (1972) requirements that each state develop plans to control sources of water pollution, including those related to silvicultural practices and natural runoff that occurs in forested areas. The maps/data are useful in preparation of Timber Harvesting Plans, and for use by land managers for identifying areas of potentially unstable ground. The maps/data serve as a guide to potential problem areas where more site-specific review is required. Supplemental Information: Bedrossian, Trinda L. Watershed Mapping in Northern California. California Geology ,June 1983. Bedrossian, Trinda L. Watershed Mapping in Northern California, an update. California Geology, February 1986. Time Period: Start: 1982 End: 1985 Currentness: Ground Condition Progress: Complete Update Frequency: Irregular Bounding Box: -124 45 00, 38 45 00 -123 37 30, 42 00 00 Themes: Earth Sciences Landslides Forests & Forestry Watersheds Geology Water Quality Mines & Mineral Resources Erosion Access No restrictions Limitations: Limits on Use: The State of California, the Department of Forestry and Fire Protection, and the Department of Conservation make no representations or warranties regarding the accuracy of data or maps. Neither the State nor the Departments shall be liable under any circumstances for any direct, special, incidental, or consequential damages with respect to any claim by any user or third party on account of or arising from the use of data or maps. Users should cite the Departments of Conservation and Forestry and Fire Protection as the original source of the data, but clearly denote cases where the original data have been updated, modified, or in any way altered from the original condition. There are no restrictions on distribution of the data or reproduction of maps created from the graphics files. However, users are encouraged to refer others to the Department of Conservation to acquire the data, in case updated data become available. Data Contact: John Schlosser 916-445-2673 Online Linkage: graphics (PDF) files are available on-line at www.consrv.ca.gov/dmg/ws Size (MB): The entire geology and geomorphic features product series can be obtained on a single CD-ROM. Each graphics (PDF) file will be available on-line and average 1 MB. Native Format: ARC/INFO Export Ordering The entire of geology and geomorphic features Information: products will be available on CD-ROM through the Distributor contact. For more information, contact: California Dept. of Conservation Division of Mines & Geology 801 K St. MS 14-34 Sacramento, Ca. 95814 916-445-5716 Distributor Division of Mines and Geology, Information Desk Contact: 916-445-5716 Metadata Date: 199801101 Metadata Contact: Joy Arthur 916-327-1042 DATA DICTIONARY Geomorphology products are provided on a single CD-ROM which contains the following directories: PLOT: contains fonts, custom symbolsets, logos, key legend files, symbology layers, and AMLs needed to create geomorphology maps GEO_COVS: contains the GIS data layers associated with geomorphology features PDF: contains graphics files in PDF format for each 7.5' quad geomorphology map product You should create a directory on your local drive, and copy the PLOT and GEO_COVS directories into it. The PLOT directory contains AMLs that must be run within the PLOT directory, and that look for data in a sister directory called GEO_COVS. You are not required to copy the PDF directory to a local drive. The CD can be used to store the graphics files for individual retrieval when needed. Each of the main geomorphology products (data layer, AML, graphics file, etc.) is documented below. *********************************************************************** COVERAGE NAME: GEOMORPH PURPOSE: This coverage contains "landslide" data (e.g. earthflows, debris slides, etc.). Each unique feature is included as a separate subclass. FEATURE TYPE: Region SUBCLASS DESCRIPTION -------------- ------------------------------- AMP Amphitheater/debris slide slope DEBSLIDEACT Active debris slide DEBSLIDEDOR Dormant debris slide DGROUND Disrupted ground EARTHFLOWACT Active earthflow EARTHFLOWDOR Dormant earthflow GORGE Inner gorge SHEAR Shear zone TRANSACT Active translational/rotational slide TRANSDOR Dormant translational/rotational slide COORDINATE SYSTEM DESCRIPTION Projection ALBERS Units METERS Spheroid CLARKE1866 Parameters: 1st standard parallel 34 0 0.000 2nd standard parallel 40 30 0.000 central meridian -120 0 0.00 latitude of projection's origin 0 0 0.000 false easting (meters) 0.00000 false northing (meters) -4000000.0000 *********************************************************************** COVERAGE NAME: QUADS PURPOSE:Used to set geographic extent of each map to a specific quad, used to "mask out" features drawn beyond the specific quad boundary. FEATURE TYPE: POLYGON DATABASE FIELDS: INPUT OUTPUT DATA DECI FIELD NAME WIDTH WIDTH TYPE MALS DESCRIPTION ----------- ----- ----- ---- ---- ----------------- QUADNAME 27 27 C - 7.5' quad name FULLNAME 35 35 C - Same as QUADNAME, no abbreviations USGSCODE 7 7 C - Standard USGS quad code OFR 12 12 C - Div. of Mines & Geology map code ALTNAME 35 35 C - Alternate 7.5' quad name (usually the 15' quad name and the quadrant) *********************************************************************** COVERAGE NAME: GEOLINES PURPOSE: This coverage contains "linear" features (inner-gorges and torrent tracks) that were too small to delineate as polygons at 1:24,000 scale FEATURE TYPE: LINE DATABASE FIELDS: INPUT OUTPUT DATA DECI DESCRIPTION FIELD NAME WIDTH WIDT TYPE MALS ----------- ----- ----- ---- ---- ----------------------- FEATURE 20 20 C - Feature Description ACT-DOR 1 1 C - Active/Dormant coding (if applicable) FIELD NAME: FEATURE FEATURE DESCRIPTION --------- ---------------- Gorge Inner Gorge Torrent-track Torrent-track FIELD NAME: ACT-DOR ACT-DOR DESCRIPTION ------- ---------------- a active feature d dormant feature ****************************************************************** COVERAGE NAME: GEOPOINTS PURPOSE: This coverage contains point data for slides that were too small to delineate as polygons at 1:24000 scale. FEATURE TYPE: POINT DATABASE FIELDS: INPUT OUTPUT DATA DECI FIELD NAME WIDTH WIDTH TYPE MALS DESCRIPTION ----------- ----- ----- ---- ---- -------------------- FEATURE 20 20 C - Feature Description FIELD NAME: FEATURE FEATURE DESCRIPTION -------------- ------------------- Slide Active slides *********************************************************************** COVERAGE NAME: GEOSYM PURPOSE: Contains linear features that are used to create standard geologic map symbols FEATURE TYPE: LINE DATABASE FIELDS: INPUT OUTPUT DATA DECI DESCRIPTION FIELD NAME WIDTH WIDTH TYPE MALS ----------- ----- ----- ---- ---- ----------------------- ACT-DOR 1 1 C - Active/dormant coding SYM 1 1 C - Line symbol coding ARROW 4 4 I - Arrowhead type FIELD NAME: ACT-DOR ACT-DOR DESCRIPTION ------- ----------- a active d dormant FIELD NAME: SYM SYM DESCRIPTION --- ----------- a flow direction arrows (earthflow and transrot) e earthflow headwall arcs w translational/rotational headwall arcs y transrotational scarp arcs FIELD NAME: ARROW ARROW DESCRIPTION ----- ------------ 4 Arrowhead symbol (used in Arcplot) for anticline, syncline, fault direction and faultdip arrows *********************************************************************** COVERAGE NAME: GORGES PURPOSE: Contains inner-gorge polygons. The arcs have been created to have directions used to ensure proper line symbology on the resulting maps FEATURE TYPE: POLYGON, LINE DATABASE FIELDS: (polygon attributes) INPUT OUTPUT DATA DECI DESCRIPTION FIELD NAME WIDTH WIDTH TYPE MALS ----------- ----- ----- ---- ---- ------------------------------- FEATURE 4 4 C - Used to indicate gorge polygons FIELD NAME: FEATURE FEATURE DESCRIPTION ----- ------------ Gorge Gorge polygon *********************************************************************** COVERAGE NAME: STUDYBND PURPOSE: Contains the outer bound of the mapped area, which sometimes includes partial quads. This boundary appears on some of the quad maps FEATURE TYPE: POLYGON *********************************************************************** AML NAME: geomorphology.aml PURPOSE: This AML creates 7.5' quad size geomorphic features maps. Everything needed by this AML should be included, except for the "backdrop" images of contour lines. The AML line that draws this image has been commented out. It can be activated if the user has access to backdrops of contours or other desired features. *********************************************************************** FILE NAME: "quad_name".pdf (the standard USGS quad name is used with any blanks replaced with an underscore) PURPOSE: Provides 7.5' quad geologic features map products that can be downloaded and plotted **********************************************************************