This data set is a compilation of pre-proposed and proposed annexation boundaries for cities and districts in Snohomish County, Washington. The boundaries are compiled from legal descriptions for each pre-proposed or proposed annexation. Legal descriptions were interpreted without assumption of intent or bias from any pre-existing maps. Spatial registration conforms to features in the Snohomish County parcel data set. Information captured include the boundary of each individual pre-proposed or proposed annexation, the entity intending to annex, the name of the intended annexation, Y or N indicating if the annexation is proposed, the BRB number of proposed annexations, and the date the intended annexation was submitted to the Assessor's office.

The Public Land Survey System (PLSS) Grid - Line is linework derived from the master coverage of the PLSS maintained by the Assessor's Office. This dataset only contains linework and attribute information for townships, ranges, sections, quarter sections and quarter quarter sections and government lot lines. It is compiled from recorded surveys and plats, coordinates and linework supplied by private surveyors, Snohomish County Public Works Survey, cities, Washington State Department Of Natural Resources (DNR) and the United States Department of the Interior - Bureau of Land Management (BLM). Standard BLM methods are used to construct the aliquot grid. In coastal areas, the aliquot grid may not apply for many of the coastal sections, it has been constructed for the purposes of land title and defining map extents for automated routines.

This data set is created using the township lines from the Snohomish County Assessor's Public Land Survey grid for the north and south boundary. The west boundary is taken from a Washington State county boundaries data set wtih a minor modification at its northerly extent to follow tide land boundries. The eastern boundary is taken from the Snohomish County basins data set.

Data DictionaryThe Allparcels data set is a thematic layer depicting past, present and future tax year real property parcel boundaries within Snohomish County, Washington based on the legal descriptions contained in the assessment roll. Parcels in this data set are defined as real property entities that can be valued for the purpose of collecting taxes. Parcels include, but are not limited to land, buildings on leased land, mobile homes and condominium units. Parcels may overlap. Parcels such as condominium units and mobile homes that may occupy a single polygon are represented as non-planar features (regions) of the same geographic extent. The Parcels data set does not depict legal ownership boundaries nor does it represent legal building lots. Snohomish County does not maintain parcels for the complete geographic coverage of the county. There is no parcel fabric in much of the eastern mountainous area. This data set is not designed to be used in connection with tabular attribute files. Its sole purpose is for historical tracking of changes in the parcel geometry. For current parcel geometry and tabular attributes, see the Parcels data set.

This polygon dataset is a compilation of all the townships in Snohomish County derived from the Public Land Survey System (PLSS) grid dataset. The PLSS grid is the master coverage of the PLSS maintained by the Assessor's Office. It contains linework and attribute information for townships and ranges. It is compiled from recorded surveys and plats, coordinates and linework supplied by private surveyors, Snohomish County Public Works Survey, cities, Washington State Department Of Natural Resources (DNR) and the United States Department of the Interior - Bureau of Land Management (BLM). Standard BLM methods are used to construct the aliquot grid. In coastal areas, the aliquot grid may not apply for many of the coastal sections, it has been constructed for the purposes of land title and defining map extents for automated routines.

This data set is a compilation of municipal annexation boundaries for cities in Snohomish County, Washington. The boundaries were compiled from legal descriptions for each annexation from the original incorporation onward. Legal descriptions were interpreted without assumption of intent or bias from any pre-existing maps. Spatial registration conforms to features in the Snohomish County parcel data set. Information captured include the boundary of each individual annexation, the effective date of the annexation and the reference to the insturment authorizing the annexation.

This data set is a compilation of tax code area boundaries in Snohomish County, Washington. Tax code areas are formed from a composite of special purpose district boundaries such as cities, fire districts, school districts, etc. Tax code areas represent areas with a uniform tax (levy) rate for that area. The boundaries of the present data set are compiled from data sets for many of the taxing districts that were compiled from legal descriptions for each annexation from the original incorporation onward. Legal descriptions were interpreted without assumption of intent or bias from any pre-existing maps. Spatial registration conforms to features in the Snohomish County parcel data set. For areas where special purpose district boundaries have not been converted, the boundaries were taken from a manually maintained atlas.

This dataset represents road centerlines (RCLs) for all named streets (including those named with a number) and private driveways in Snohomish County for use in the Washington State Next Generation 911 (NG911) program to support emergency call routing. RCLs follow the NENA RCL GIS data model and are provided to the Washington State NG911 program on a monthly basis and to Snohomish County Public Safety Answering Points on request. Any other use of these data are not directly supported by Snohomish County.Roads and driveways are updated daily or weekly from addressing notifications sent from partner jurisdictions, Snohomish County PDS, SNO911 dispatcher comments, reports from field crews, UAS flights conducted by EESCS, and other verified data sources as required. Named roads are typically digitized from official site plans and occasionally deviate from final construction. Private driveways are added to support proper routing of emergency crews and often include unofficial or ad-hoc roadways, and will always join another RCL at a vertex. Named roads are split wherever they intersect another named road or cross a jurisdictional boundary. Fields include valid TO and FROM address ranges for the street segment. In some cases, RCLs in new developments may appear in data before the roadway is completed. For a detailed description of all fields please refer to the NENA NG911 data model: https://www.nena.org/page/ng911gisdatamodel

Data Dictionary, Related DocumentThe Subdivisions data set is a thematic layer depicting subdivision boundaries such as formal plats, condominiums, short plats, etc. Subdivisions are defined as real property entities that have gone through a formal review process through a county or city regulatory agency for the purpose of subdividing land into smaller legal building lots. Subdivisions may overlap completely or partially. The subdivisions layer is complete for formal plats and condominiums only. It does not depict all subdivisions of legal record for other types of subdivision.

Data Dictionary, Shared Account Relate Document, Related DocumentThe Parcels data set is a thematic layer depicting current real property parcel boundaries within Snohomish County, Washington based on the legal descriptions contained in the assessment roll. Parcels in this data set are defined as real property entities that can be valued for the purpose of collecting taxes. Parcels include, but are not limited to land, buildings on leased land, mobile homes and condominium units. Parcels may overlap. Parcels such as condominium units and mobile homes that may occupy a single polygon are represented as non-planar features (regions) of the same geographic extent. The Parcels data set does not depict legal ownership boundaries nor does it represent legal building lots. Snohomish County does not maintain parcels for the complete geographic coverage of the county. There is no parcel fabric in much of the eastern mountainous area.

The Public Land Survey System (PLSS) Grid - Points is point data derived from the master coverage of the PLSS maintained by the Assessor's Office. This dataset only contains points. It is compiled from recorded surveys and plats, coordinates and linework supplied by private surveyors, Snohomish County Public Works Survey, cities, Washington State Department Of Natural Resources (DNR) and the United States Department of the Interior - Bureau of Land Management (BLM). Standard BLM methods are used to construct the aliquot grid. In coastal areas, the aliquot grid may not apply for many of the coastal sections, it has been constructed for the purposes of land title and defining map extents for automated routines.

This dataset represents the location of site structure address points (SSAPs) for officially and unofficially addressed buildings and similar structures in Snohomish County for use in the Washington State Next Generation 911 Program that could be reported to 911 for the purpose of emergency call routing. SSAPs follow the NENA RCL GIS data model and are provided to the Washington State NG911 program on a monthly basis and to Snohomish County Public Safety Answering Points on request. Any other use of these data are not directly supported by Snohomish County.These data are updated weekly from address notifications sent from partner jurisdictions, Snohomish County PDS, reports from field crews, SNO911 dispatcher comments, UAS flights conducted by EESCS and other verified data sources. SSAPs are typically placed over the center of a building but may be moved closer to an adjacent road centerline as needed for proper routing of emergency crews. SSAPs were originally generated via parcel centroids and unless moved remain there. New SSAPs are placed according to approved site plans and may occasionally differ from final physical placement. For addresses containing multiple sub-addresses (EX two units or apartments sharing a common address), a point is created for each sub-address AND a separate point containing no sub address information. Examples of unofficially addressed locations include legacy addresses that may still be commonly reported by 911 callers, temporary construction sites, unapproved ADUs, or similar temporary housing or shelter with self-reported addressing. Such SSAPs are included in these data for the express purpose of routing emergency services to the reported location, regardless of true address. As such, SSAPs will periodically contain erroneous data by design. In some cases, SSAPs in new developments may appear in data before the roadway is completed. For a detailed description of all fields please refer to the NENA NG911 data model: https://www.nena.org/page/ng911gisdatamodel

The Public Land Survey System (PLSS) Grid - Polygon are polygons derived from the master coverage of the PLSS maintained by the Assessor's Office. This dataset only contains polygon information. It contains polygons mostly at a quarter quarter section resolution except in certain non-urban areas where a lower full section resolution or hybrid is used. It is compiled from recorded surveys and plats, coordinates and linework supplied by private surveyors, Snohomish County Public Works Survey, cities, Washington State Department Of Natural Resources (DNR) and the United States Department of the Interior - Bureau of Land Management (BLM). Standard BLM methods are used to construct the aliquot grid. In coastal areas, the aliquot grid may not apply for many of the coastal sections, it has been constructed for the purposes of land title and defining map extents for automated routines.

Data DictionaryThe Parcelcent data set is a thematic layer depicting current real property parcel internal centroids within Snohomish County, Washington based on the boundaries of the Parcels data set. Parcels in this data set are defined as real property entities that can be valued for the purpose of collecting taxes. Parcels include, but are not limited to land, buildings on leased land, mobile homes and condominium units. Parcel centroids may be coincident. Parcels such as condominium units and mobile homes that may occupy a single polygon are represented as non-planar features (regions) of the same geographic extent and have the same centroid position in this data set. The Parcelcent data set does not depict legal ownership nor does it represent legal building lots. Snohomish County does not maintain parcels or centroids for the complete geographic coverage of the county. There is no parcel fabric in much of the eastern mountainous area. The purpose of this data set is to facilitate polygon overlay operations with the parcel data set. This data set has the same attributes as the Parcels data set it is derived from.

Data Dictionary, Related DocumentThe Easements data set is a thematic layer depicting easements such as ingress-egress, utility, drainage, etc. across real property parcels within Snohomish County, Washington. Easements may overlap completely or partially. The Easements data set does not depict all easements of legal record.

Snohomish County Land Cover Metrics including City Boundaries

The Improvements Record file is a record of structure improvements made to a property, including initial construction, renovations, additions, and repairs. This file contains the parcel number, Use Code description, improvement type, year built, and other features and dates related to the property's improvements.

Washington State’s Growth Management Act (GMA) (chapter 36.70A RCW) requires the development of a comprehensive plan. Comprehensive Plan {https://www.snohomishcountywa.gov/2139/Comprehensive-Plan} changes are voted on once per year by the Snohomish County Council, with recommendations given by the Planning Commission, Public comments, and the Department of Planning and Development Services (PDS).The Comprehensive Plan serves as the document that guides County decisions and services on a wide range of topics, including: land use, transportation, parks, housing, capital facilities and the natural environment. The Comprehensive Plan consists of five components:The General Policy Plan consists of goals, objectives and policies that serve as a guide to the county’s growth and development.The Future Land Use Map (PDF) expresses graphically the 20-year vision of the preferred land use pattern. It identifies the urban growth areas around cities and towns, as well as urban, rural, and resource lands. The map is implemented through numerous zoning classifications and development regulations.The Transportation Element presents a plan for transportation facilities and services to support the needs of the projected populations.The Capital Facilities Plan (PDF) contains an inventory of the county’s public facilities and utilities, establishes level of service standards necessary to support development, and prioritizes facilities needed to support the needs of the projected populations.The Park and Recreation Element presents a plan for park and recreation facilities and services to support the needs of the projected populations.Outside of the periodic update cycle, less extensive revisions are allowed through the docketing process and County-initiated amendment proposals. Information on current and past proposals, and to find out about submitting an amendment to the Comprehensive Plan can be obtained from the Docket and County-Initiated Amendments web page.

Grocery store names, locations, parent companies, and types (hereafter 'data points') were compiled by a student intern at Western Washington University in .csv format. These stores represent known grocery stores of various sizes and functions found in King, Snohomish, Pierce and Thurston counties. Supply nodes from Spokane, WA and Portland, OR were also added. Of these data points, approximately 3500 were associated with XY coordinates. These were projected in ArcMap as a .gdb feature class. Approximately 500 missing XY data were assigned coordinates using the ESRI global geolocator service. Neither the geolocated data points nor the points with provided XY data were confirmed for accuracy (or completeness), and should be considered for general reference only.Data points recognized as supply nodes were checked for accuracy by SnoCo DEM planners. Supply nodes were attributed to demand nodes by 'Parent_Company_Brand' field using a provided list of parent companies and associated distribution centers.Known issues: two CoreMark distribution centers serve Circle K and 7-11 stores. For this reason they have been assigned the same 'SupplyNode ID' in the Supply Node layer and will not be unique. Updated July 3rd, 2018.

Three Native American Indian Tribal Organizations maintain lands in Snohomish County; 1.) Tulalip (pronounced Tuh’-lay-lup) Tribes, successors in interest to the Snohomish, Snoqualmie, Skykomish and other allied tribes and bands signatory to the 1855 Treaty of Point Elliott; 2.) The Stillaguamish Tribe of Indians is composed of descendants of the 1855 Stoluck-wa-mish River Tribe. In 1855 the population resided on the main branch of the river, as well as the north and south forks; 3.) The Sauk-Suiattle Indian Tribe people lived under the gaze of Whitehorse Mountain for many generations. The Tribal People lived as hunters, gathers and fishermen in the region of Sauk Prairie near the present-day town of Darrington, Washington, and the early days, were known as the Sah-ku-mehu. Hat (Gedney) Island also has a few fee simple parcels owned by the Suquamish Tribe.These data contain Indian Trust Lands, Pending Trust Lands, Fee Simple Lands owned by Tribal Members or Tribal Associations. Currently, these data are compiled from Snohomish County Assessor Records and any data made available thru the Tribal Organizations or may be derived from historical Federal Bureau of Indian Affairs (BIA) communications . The data may not be complete or accurate.