Description: This dataset contains "identified communities" in Tuolumne County. This data is not for official townships or cities, but meant as a reference for local knowledge and smaller communities. It is housed and maintained by the GIS Division of the County of Tuolumne. Exported in April of 2026 for the purpose of trail inventory analysis for Fehr & Peers.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This dataset is a new and improved version of the original Spotted Owl Territories [ds97] dataset. The original dataset represented spotted owl territories as activity center observation points with thousands of additional owl observations available in a separate table but not spatially enabled. In this new dataset, the additional owl observations (both positive and negative sightings) have been spatially enabled as points and are now displayed along with the activity center points. See the attribute "TYPEOBS" for a determination of whether an observation is positive (POS), negative (NEG) or an activity center (AC). Many of the observation locations were approximated by plotting them to a grid of the Public Land Survey System (PLSS) based on PLSS references in their record descriptions.This dataset combines information on the location and status of Northern Spotted Owls, California Spotted Owls in the Sierra Nevada, and California Spotted Owls in southern California. Almost all records have been gathered since the early 1970s. Some observations from early 20th century literature also are included. The vast majority of data were collected in the field by biologists and technicians mainly working for US Forest Service, Bureau of Land Management, California Department of Fish and Wildlife, consultants, National Park Service, industrial timber companies, universities conducting surveys and doing research, and the local birding community. Most observations were obtained using standard survey protocols ("Protocol for surveying proposed management activities that may impact northern spotted owls." US Fish and Wildlife Service. 2011). The protocols are available at https://www.wildlife.ca.gov/Conservation/Survey-ProtocolsWhat is an activity center? "Activity Center: Spotted owls have been characterized as central-place foragers, where individuals forage over a wide area and subsequently return to a nest or roost location that is often centrally-located within the home range (Rosenberg and McKelvey 1999). Activity centers are location or point within the core use area that represent this central location. Nest sites are typically used to identify activity centers, or in cases where nests have not been identified, breeding season roost sites or areas of concentrated nighttime detections may be used to identify activity centers." U.S. Fish and Wildlife Service. 2011. Revised Recovery Plan for the Northern Spotted Owl (Strix occidentalis caurina). U.S. Fish and Wildlife Service, Portland, Oregon. xvi + 258 pp. A copy of the Revised Recovery Plan and other related materials can be found at: https://www.fws.gov/oregonfwo/Species/Data/NorthernSpottedOwl/main.asp.The database only maps one activity center per site; however, multiple acitivity centers may exist on the landscape.An additional dataset (Spotted Owl Observations Spider Diagram [ds705]) is available that shows lines representing relationships between activity centers and observations in this dataset. The spider diagram dataset is meant to accompany this observations dataset to assist with site visualizations and dataset review efforts. OTHER THINGS TO KNOW:Data is not deleted if it is determined that a site is unoccupied, abandoned, or invalid. Abandonedand invalid sitesare retained in the database but their status changed to indicate they no longer require protections. Occupancy is an annual status that is not tracked by the database due to variations in data availability and survey effort across the state.Coordinates listed in the dataset use the NAD83 datum.Many site locations in this dataset were approximated using a grid of the Public Land Survey System (PLSS, also known as the Meridian, Township, Range, and Section, or MTRS system). The PLSS grid originated from 1:100,000-scale US Geological Survey topographic maps and also included additional protracted/extrapolated linework within Spanish land grants and other areas not covered by the PLSS process. At the time of data processing, this PLSS grid represents the most complete statewide grid available for California. However, the linework from this grid does not always exactly follow the PLSS linework used on other sources such as 1:24,000-scale US Geological Survey topographic maps, which may have been used for site reporting. New mapping and compilations of PLSS linework are occurring in many areas in California but may not be available statewide. As more improved and complete statewide PLSS data become available, it may be possible to better approximate some site locations in this dataset.This layer was exported in April of 2026 for use by Fehr & Peers for a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: Observations were compiled by the California Department of Fish and Wildlife from a variety of sources, notably including the private timber companies, US Forest Service, and researchers.
Description: This layer contains school locations in Tuolumne County, California including the community college, high schools, elementary schools, and charter schools. It was created and is maintained by the GIS Division of the County of Tuolumne. This layer was exported in April of 2026 for use by Fehr & Peers on a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This layer contains all the known county operated transit stops in Tuolumne County. This layer was created and maintained by the GIS Division of the County of Tuolumne. It was exported in April of 2026 for use by Fehr & Peers for a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This layer includes all the known county operated transit routes in Tuolumne County. This layer was created and maintained by the GIS Division of the County of Tuolumne. It was exported in April of 2026 for use by Fehr & Peers for a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This layer includes the line segments that make up the Tuolumne Heritage Trail project run by TCTC. This layer was exported in April of 2026 for use by Fehr & Peers for a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This layer was exported in April of 2026 for use by Fehr & Peers on a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This dataset contains all the sidewalks that are managed and maintained by the Public Works Department of the County of Tuolumne. It is housed and maintained by the GIS Division of the County of Tuolumne. Exported in April of 2026 for the purpose of trail inventory analysis for Fehr & Peers.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This route feature class is a work in progress and is based on the Tuolumne County Road feature class. The Routes are being corrected and applied with measures (miles) in this order: Highways> Major roads> Minor roads> Local roads>Private roads and Forest Service roads. Corrective tools include GPS data and ortho photographs from various years (mostly NAIP 2014, TC 2006 aerials). Some problem areas have been identified in the 2006 aerials and these roads will have to be corrected later with better data. At this point (Feb '17), the Highways, Major and Minor Collectors and Local maintained roads have been completed. Private and Forest Service roads may still need correcting. This dataset was exported in April of 2026 for use by Fehr & Peers on a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: These contour lines are for elevation reference within Tuolumne County, shown in 100 foot increments. It is housed and maintained by the GIS Division of the County of Tuolumne. Exported in April of 2026 for the purpose of trail inventory analysis for Fehr & Peers.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: The California Natural Diversity Database (CNDDB) is a product of the California Department of Fish and Wildlife's Biogeographic Data Branch (BDB). The CNDDB is both a manual and computerized library of the status and locations of California's rare species and natural community types. The CNDDB includes in its data all federally and state listed plants and animals, all species that are candidates for listing, all species of special concern, and those species that are considered "sensitive" by government agencies and the conservation community. The computerized information is available for a fee in hardcopy and digital forms. The CNDDB is a dynamic system with information continually being added and upgraded. The CNDDB contains over 98,000 locational records for over 2,500 elements (plant taxa, animal taxa, and natural communities). A location record is referred to as an Element Occurrence (EO), and is a site that contains an individual, population, nest site, den, or stand of a special status element. Populations, individuals, or colonies located within 1/4 mile of each other generally constitute a single occurrence, sometimes with multiple parts.This layer was exported in April of 2026 for use by Fehr & Peers for a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: California Department of Fish and Wildlife, California Natural Diversity Database
Description: This shapefile is the boundary of Tuolumne County in California. It is housed and maintained by the GIS Division of the County of Tuolumne. Exported in April of 2026 for the purpose of trail inventory analysis for Fehr & Peers.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: This polygon is the boundary for the City of Sonora in Tuolumne County, CA. It is housed and maintained by the GIS Division of the County of Tuolumne. Exported in April of 2026 for the purpose of trail inventory analysis for Fehr & Peers.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: Created July 2015 and consistently being updated. Data is incomplete; data added as time permits. It is housed and maintained by the GIS Division of the County of Tuolumne. Exported in April of 2026 for the purpose of trail inventory analysis for Fehr & Peers.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.
Description: An area depicted as surface ownership parcels dissolved on the same ownership classification. This dataset was exported in April of 2026 for use by Fehr & Peers for a trails inventory project through TCTC.
Service Item Id: 7133055b508745df8542e66c2b3c5b80
Copyright Text: This dataset is provided courtesy of the County of Tuolumne, GIS Division. The County of Tuolumne cannot guarantee relatability or suitability of this information. Original data was compiled from a variety of sources, and the spatial information has variable accuracy. The dataset is subject to routine and occasional updating, correcting, and other modification without notification.