These data are benthic study GIS shapefiles (.shp, .shx, .prj) with associated .dbf attribute tables and specific Federal Geographic Data Committee metadata. A generalized browse graphic was generated at the NODC and included with these data. The data were developed to support ecosystem based management in the Humboldt Bay region. The focus of the mapping was on shallow water benthic habitats with particular concern for eelgrass meadows. The study area covers Arcata (North) Bay, Entrance Bay, South Bay and the Eel River Delta, Humboldt County, California.

Tax rate area boundaries and related data based on changes filed with the Board of Equalization per Government Code 54900 for the specified assessment roll year. The data included in this map is maintained by the California State Board of Equalization and may differ slightly from the data published by other agencies. BOE_TRA layer = tax rate area boundaries and the assigned TRA number for the specified assessment roll year; BOE_Changes layer = boundary changes filed with the Board of Equalization for the specified assessment roll year; Data Table (C##_YYYY) = tax rate area numbers and related districts for the specified assessment roll year

These data provide an accurate high-resolution shoreline compiled from imagery of PORT OF HUMBOLDT BAY, CA . This vector shoreline data is based on an office interpretation of imagery that may be suitable as a geographic information system (GIS) data layer. This metadata describes information for both the line and point shapefiles. The NGS attribution scheme 'Coastal Cartographic Object Attribute Source Table (C-COAST)' was developed to conform the attribution of various sources of shoreline data into one attribution catalog. C-COAST is not a recognized standard, but was influenced by the International Hydrographic Organization's S-57 Object-Attribute standard so the data would be more accurately translated into S-57. This resource is a member of https://www.fisheries.noaa.gov/inport/item/39808

These data provide an accurate high-resolution shoreline compiled from imagery of PORT OF HUMBOLDT/EUREKA, CA . This vector shoreline data is based on an office interpretation of imagery that may be suitable as a geographic information system (GIS) data layer. This metadata describes information for both the line and point shapefiles. The NGS attribution scheme 'Coastal Cartographic Object At...

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national filewith no overlaps or gaps between parts, however, each TIGER/Line File is designed to stand alone as an independent dataset, or they can be combined to cover the entire nation. The Area Hydrography Shapefile contains the geometry and attributes of both perennial and intermittent area hydrography features, including ponds, lakes, oceans, swamps (up to the U.S. nautical three-mile limit), glaciers, and the area covered by large rivers, streams, and/or canals that are represented as double-line drainage. Single-line drainage water features can be found in the Linear Hydrography Shapefile (LINEARWATER.shp). Linear water features includes single-line drainage water features and artificial path features, where they exist, that run through double-line drainage features such as rivers, streams, and/or canals, and serve as a linear representation of these features.

This shapefile contains tax rate area (TRA) boundaries in Humboldt County for the specified assessment roll year. Boundary alignment is based on the 2017 county parcel map. A tax rate area (TRA) is a geographic area within the jurisdiction of a unique combination of cities, schools, and revenue districts that utilize the regular city or county assessment roll, per Government Code 54900. Each TRA is assigned a six-digit numeric identifier, referred to as a TRA number. TRA = tax rate area number

1:24,000 scale Geology of the Delvada Spring Quadrangle, Humboldt County, Nevada. Detailed geologic mapping by A. Elizabeth Jones in 1997. Field work done in 1987-1991, and 1996. Map includes 1 cross section and description of 16 units. The GIS work was in support of the U. S. Geological Survey COGEOMAP program. The Geodatabase specifies feature datasets and feature classes, together with feature attributes, subtypes and domains, suitable for the printed geologic map. In addition to basic geology (lithology, contacts and faults, etc.), the maps may include metamorphic overprints, cross-sections, and explanatory legend-graphics such as correlation charts, used to supplement columnar legends. The Delvada Spring 7.5' Quacjrangle in Humboldt County, Nevada, covers the southern end of the Hot Springs Range and a small part of the Osgood Mountains northeast of Winnemucca. The map area lies at the western edge of a large area of exposure of Paleozoic rocks that are surrounded by Mesozoic and Cenozoic igneous and sedimentary rocks. Geologic mapping was supported by Santa Fe Pacific Gold Corp. (Newmont), Kennecott Exploration Co., and the University of California, Santa Barbara Dept. of Geological Sciences. Base map: U. S. Geological Survey Delvada Spring 7.5-minute Quadrangle, 1988. To download this Map PDF and associated report text, and GIS zipped data set, please see the links provided.

A mosaic of the original 1870 U.S. Coast Survey map of Humboldt Bay. Individual map sheets were subset, edge matched, and mosaiced in Adobe Photoshop and saved as a composite TIFF image. The composite TIFF image was then georeferenced in ERDAS 9.0 using section corners on the USGS DRG as a basis for control. This data set is reference to the UTM Zone 10 coordinate system, units are in meters.This dataset was developed as part of the Humboldt Bay / Eel River Delta Historic Atlas project by McBain and Trush. It is intended to give a general representation of spatial landscape changes over time. This layer is the earliest and most detailed survey of the Humboldt Bay shoreline and salt marsh extent in the Atlas. This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application.

Tax rate area boundaries and related data based on changes filed with the Board of Equalization per Government Code 54900 for the specified assessment roll year. The data included in this map is maintained by the California State Board of Equalization and may differ slightly from the data published by other agencies. BOE_TRA layer = tax rate area boundaries and the assigned TRA number for the specified assessment roll year; BOE_Changes layer = boundary changes filed with the Board of Equalization for the specified assessment roll year; Data Table (C##_YYYY) = tax rate area numbers and related districts for the specified assessment roll year

These data were automated to provide an accurate high-resolution historical shoreline of Humboldt Bay, California suitable as a geographic information system (GIS) data layer. These data are derived from shoreline maps that were produced by the NOAA National Ocean Service including its predecessor agencies which were based on an office interpretation of imagery and/or field survey. The NGS attribution scheme 'Coastal Cartographic Object Attribute Source Table (C-COAST)' was developed to conform the attribution of various sources of shoreline data into one attribution catalog. C-COAST is not a recognized standard, but was influenced by the International Hydrographic Organization's S-57 Object-Attribute standard so the data would be more accurately translated into S-57. This resource is a member of https://www.fisheries.noaa.gov/inport/item/39808

These data provide an accurate high-resolution shoreline compiled from imagery of Port of Humboldt/Eureka, CA . This vector shoreline data is based on an office interpretation of imagery that may be suitable as a geographic information system (GIS) data layer. This metadata describes information for both the line and point shapefiles. The NGS attribution scheme 'Coastal Cartographic Object At...

This shapefile contains polygons representing areas that had a change to the tax rate area number or boundary according to Statement of Boundary Changes filed with the California State Board of Equalization, per Government Code 54900. The change number refers to the Statement of Boundary Change documents on file with the California State Board of Equalization-Tax Area Services Section. CHG_NO = Board of Equalization (BOE) file number

The 1981 California Department of Forestry Humboldt County aerial photos were flown at a scale of 1:24000 on 6-15-1981. The photo frames were scanned at 600 dpi and then orthorectified in ERDAS 9.0 using photo identifiable points on the 2005 National Agriculture Inventory Program image. Camera calibration information was acquired for this flight. Camera type was a Wild Heerbrugg RC8 with a calibrated focal length of 152.110 mm. This dataset is reference to the UTM Zone 10 coordinate system, units are in meters.This dataset was developed as part of the Humboldt Bay / Eel River Delta Historic Atlas project by McBain and Trush Inc. It is intended to give a general representation of spatial landscape changes over time. This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application.

The 1970 Humboldt County aerial photos were flown at a scale of 1:20000 on 9-9-1970. The photo frames were scanned at 600 dpi and then orthorectified in ERDAS 9.0 using photo identifiable points on the 2005 National Agriculture Inventory Program image. Camera calibration information was acquired for this flight. Camera type was an Aerial Camera Type K-17 with a calibrated focal length of 303.02 mm. This dataset is reference to the UTM Zone 10 coordinate system, units are in meters.This dataset was developed as part of the Humboldt Bay / Eel River Delta Historic Atlas project by McBain and Trush Inc. It is intended to give a general representation of spatial landscape changes over time. This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application.

The 1988 WAC Humboldt County aerial photos were flown at a scale of 1:24000 on 3-30-1988. The photo frames were scanned at 600 dpi and then orthorectified in ERDAS 9.0 using photo identifiable points on the 2005 National Agriculture Inventory Program image. No camera calibration information was able to be acquired before the orthorectification so internal orientation information was calculated using methods described in the Yusuke Niwa paper "Creating Orthorectified Aerial Photography Without A Camera Calibration Report". This dataset is reference to the UTM Zone 10 coordinate system, units are in meters.This dataset was developed as part of the Humboldt Bay / Eel River Delta Historic Atlas project by McBain and Trush Inc. It is intended to give a general representation of spatial landscape changes over time. This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application.

This shapefile contains polygons representing areas that had a change to the tax rate area number or boundary according to Statement of Boundary Changes filed with the California State Board of Equalization, per Government Code 54900. The change number refers to the Statement of Boundary Change documents on file with the California State Board of Equalization-Tax Area Services Section. CHG_NO = Board of Equalization (BOE) file number

Background - Interest in developing alternative sources of renewable energy to reduce dependence on oil has increased in recent years. Some sources of renewable energy being considered will include power generation infrastructure and support activities located within continental shelf waters, and potentially within deeper waters off the U.S. Pacific coast and beyond state waters (i.e., outside three nautical miles). Currently, the Bureau of Ocean Energy Management (BOEM) is considering renewable energy proposals off the coast of Oregon, California, and Hawaii. From 1999–2002, the U.S. Geological Survey (USGS) and Humboldt State University (HSU) worked with BOEM (formely known as the Minerals Management Service, MMS) to conduct a multi-year study that quantified the at-sea distribution of seabirds and marine mammals. The aerial at-sea survey team flew over 55,000 kilometers and counted 485,000 seabirds (67 species) and 64,000 marine mammals (19 species). The study provided resource managers with updated information on distribution and abundance patterns and compared results with information from the late 1970s to early 1980s (Briggs et al. 1981, Briggs et al. 1987, see Mason et al. 2007). The California Department of Fish and Game (CDFG; now CA Department of Fish and Wildlife, CADFW) and U.S. Navy also provided significant matching funds. Oceanographic Context - USGS-HSU surveys began in May 1999, immediately following the strong 1997–1998 El Niño event. The 1999–2002 period featured a series of cold-water, La Niña events which led some researchers to postulate that the California Current System (CCS) had undergone a fundamental climate shift, on the scale of those documented in the 1920s, mid 1940s, and mid 1970s (Schwing et al. 2002). Generally, La Niña events have corresponded with stronger than normal upwelling in the CCS, and during this period, resulted in the greatest 4-yr mean upwelling index value on record (Schwing et al. 2002). La Niñas often follow El Niños, and seabird community composition (i.e., relative species-specific abundances) in any given year off southern California, is subject to variability caused by shifts in distribution among both warm- and cool-water affiliated species (Hyrenbach and Veit 2003). In contrast to the Mason et al. (2007) surveys, Briggs et al. (1987) conducted surveys during 1975–1983, coincident with another climate shift—from cold to warm conditions throughout the CCS (Mantua et al. 1997). Briggs et al. surveyed north of Point Conception during 1980–1983, after the transition to warmer water conditions occurred in the CCS. Acknowledgements - This project was funded by BOEM through an Interagency Agreement with the U.S. Geological Survey. The authors of these GIS data require that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Aerial survey fieldwork in 1999-2002 was conducted jointly by the U.S. Geological Survey (Western Ecological Research Center, California: Principal Investigators J.Y, Takekawa and D. Orthmeyer; Key Project Staff: J. Adams, J. Ackerman, W.M. Perry, J.J. Felis, and J.L. Lee) and Humboldt State University (Department of Wildlife, Arcata, California; Principal Investigators: R.T. Golightly and H.R. Carter; Project Leader: G. McChesney; Key Project Staff: J. Mason and W. McIver). Major project cooperators who actively participated in aerial at-sea surveys include the Minerals Management Service (M. Pierson, M. McCrary), California Department of Fish and Wildlife (P. Kelly), and the U.S. Navy (S. Schwartz, T. Keeney). For additional acknowledgments, see Mason et al. (2007). These data are associated with the following publication: Mason, J.W., McChesney, G.J., McIver, W.R., Carter, H.R., Takekawa, J.Y., Golightly, R.T., Ackerman, J.T., Orthmeyer, D.L., Perry, W.M., Yee, J.L. and Pierson, M.O. 2007. At-sea distribution and abundance of seabirds off southern California: a 20-Year comparison. Cooper Ornithological Society, Studies in Avian Biology Vol. 33. References - Briggs, K.T., E.W. Chu, D.B. Lewis, W.B. Tyler, R.L. Pitman, and G.L. Hunt Jr. 1981. Summary of marine mammal and seabird surveys of the Southern California Bight area 1975–1978. Volume III. Investigators’ reports. Part III. USDI Bureau of Land Management BLM/YN/SR-81/01-04 (PB81-248197) and University of California, Institute of Marine Sciences, Santa Cruz, CA. Briggs, K.T., W.B. Tyler, D.B. Lewis, and D.R. Carlson. 1987. Bird communities at sea off California: 1975–1983. Studies in Avian Biology 11. Schwing, F.B., T. Murphree, and P.M. Green. 2002. The Northern Oscillation Index (NOI): a new climate index for the northeast Pacific. Progress in Oceanography 53: 115-139. Hyrenbach, K.D. and R.R. Veit. 2003. Ocean warming and seabird communities of the southern California Current System (1987–98): response at multiple temporal scales. Deep Sea Research Part II: Topical Studies in Oceanography 50: 2537-2565. Mantua, N.J., Hare, S.R., Zhang, Y., Wallace, J.M. and Francis, R.C. 1997. A Pacific interdecadal climate oscillation with impacts on salmon production. Bulletin of the American Meteorological Society, 78: 1069-1079. ESRI. ArcGIS Desktop: Release 10. Redlands, CA: Environmental Systems Research Institute. Mason, J.W., McChesney, G.J., McIver, W.R., Carter, H.R., Takekawa, J.Y., Golightly, R.T., Ackerman, J.T., Orthmeyer, D.L., Perry, W.M., Yee, J.L. and Pierson, M.O. 2007. At-sea distribution and abundance of seabirds off southern California: a 20-Year comparison. Cooper Ornithological Society, Studies in Avian Biology Vol. 33.

Este producto es resultado de la ejecución del contrato 13-13-014-091PS, firmado entre el Instituto Geográfico Agustín Codazz (IGAC) y el Instituto Humboldt, en el marco del convenio 005 (13-014) entre el Instituto Humboldt y el Fondo Adaptación. Contiene el levantamiento semidatallado a escala 1:25.000, zonificación de tierras y capacidad de uso para los humedales de la región del pacífico.

Public Resources Code 4201-4204 directs the California Department of Forestry and Fire Protection (CAL FIRE) to map fire hazard within State Responsibility Areas (SRA) based on fuel loading, slope, fire weather, and other relevant factors present, including areas where winds have been identified by the department as a major cause of wildfire spread. These zones, referred to as Fire Hazard Severity Zones (FHSZ), classify a wildland zone as Moderate, High, or Very High fire hazard based on the average hazard across the area included in the zone.