UGB history

The history of urban growth boundary annexations for the Portland Metro region. Areas that were added to the UGB are attributed with the year they were added. The data only contains additions for the current UGB; areas that were added to the UGB, and then subsequently removed, are not part of this data. Date of last data update: 2026-05-11 This is official RLIS data. Contact Person: Clint Chiavarini [e-mail] Emailing the contact person listed above is the fastest way to get a response, but if you prefer to call, you can contact the Data Resource Center at 503-797-1742 and someone will return your call as soon as they are able. RLIS Metadata Viewer: https://gis.oregonmetro.gov/rlis-metadata/#/details/2508 Terms of Use: https://rlisdiscovery.oregonmetro.gov/pages/open-database-license波特兰都会区（Portland Metro）城市增长边界（Urban Growth Boundary）并入事件历史数据集。本数据集收录了所有被纳入该边界的区域及其并入年份，且仅包含当前生效的城市增长边界的新增区域；曾被纳入该边界后又被移除的区域均不在本数据集范围内。最后数据更新日期：2026年5月11日。本数据集为官方RLIS数据。联系人：克林特·基亚瓦里尼（Clint Chiavarini），邮箱：[e-mail]。通过上述联系人邮箱发送邮件是获得回复的最快方式；若您偏好电话咨询，可拨打数据资源中心（Data Resource Center）热线503-797-1742，工作人员将尽快回电。RLIS元数据查看器：https://gis.oregonmetro.gov/rlis-metadata/#/details/2508。使用条款：https://rlisdiscovery.oregonmetro.gov/pages/open-database-license