OFM BAS annexation polygons [Washington (State)]
Office of Financial Management Full Details
Full Details
- Title
- OFM BAS annexation polygons [Washington (State)]
- Description
- BAS Submissions Read Me This shapefile includes the annexation polygons that the Office of Financial Management (OFM) has sent to the Census Bureau since March 2020 as part of the Boundary and Annexation Survey (BAS). The Census Bureau uses these polygons to update Washington State's city limits. Field names follow Census BAS guidelines, and an outline of relevant field names is below. More information about BAS can be found here: https://www.census.gov/programs-surveys/bas.html The polygons include the quarterly annexations and other boundary corrections that effect the Census city boundaries, as well as several county boundary adjustments for King, Kittitas, Pierce, Spokane, and Stevens County. The annexation polygons were originally created by Washington's Department of Transportation, and then edited by OFM to align with the latest BAS city boundary file available. These polygons to not follow the strict legal description of the annexation, as their intent is to make clear delineations between jurisdictions for population allocation. The following are the main differences between BAS annexation polygons and the originals: <!-- The edges and vertices of polygons are snapped first to contiguous Census city limits and then to county parcels <!-- Where an annexation moves a city boundary to be either adjacent or across a right of way, the polygon is drawn to the centerline of the right of way <!-- Annexations that are only include a right of way are often omitted, as they will not change the Census Bureau boundary This file is updated quarterly. For questions or for data from earlier years, please contact Nate Chase nate.chase@ofm.wa.gov. Relevant Field Names: <!-- CHNG_TYPE- Type of area update. A is annexation, D is deannexation, and B is a boundary correction which is a newly discovered boundary discrepancy <!-- Eff_date- the local effective date <!-- AUTHYPE- O is ordinance or resolution; X is for boundary correction; L signifies a county boundary correction <!-- DOCU- the legal ordinance or resolution for the annexation. If there is a blank, then the entry is a correction polygon. <!-- RELATE- Changing from in or out of jurisdiction <!-- JUSTIFY- OFM's reason for submitting the change polygon <!-- A_Date- this is the date that OFM approves the annexation. OFM cannot legally approve annexations until all state requirements are met. The approval date cannot be earlier than the effective date, but it can be on the same day. OFM's population determinations use the approval date of annexations. BAS submissions are only submitted after this date. <!-- Source- The file in which the change polygon was originally submitted. Examples: o 2022_Q1 submitted in December 2021 o 2022_Q2 submitted in March 2022 o 2022_Q3 submitted in June 2022 o 2022_Q4 submitted in September 2022
- Creator
- Office of Financial Management
- Temporal Coverage
- Last modified 2025-03-28
- Date Issued
- 2023-06-15
- Access Rights
- Public
- Format
- File
- Language
- English
- Date Added
- August 28, 2025
Resource Class
Place
Provider
Location
Links
Cite and Reference
-
Citation
Office of Financial Management (2023). OFM BAS annexation polygons [Washington (State)]. . https://geo.wa.gov/maps/wa-ofm::ofm-bas-annexation-polygons (web service) -
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