Vacant and Developed Land 2012
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Area appearing unimproved on 2012 aerial photography, without regard to developability and accessibility. On partially developed parcels, only undeveloped areas 1/2 acre or larger are included. Metro's Vacant Land Definitions: Every tax lot is determined to be vacant, partially vacant, or developed. Vacant tax lots are those that have no building, improvements or identifiable land use. Developed lots must have improvements and specific land uses. For example, a paved parking lot is developed but an unpaved lot where trucks are parked is vacant. Lots under site development are only considered developed if structure is evident. For example, earthwork and grading are considered vacant but buildings under construction (foundation or more) are considered developed. If a developed tax lot has 1/2 acre (20,000-sq. ft.) or greater portion that is vacant, the lot is considered to be partially vacant and partially developed. A polygon is delineated around the occupied portion, which includes buildings, landscaped yards, etc. The remaining portion (greater than 1/2 acre) is coded vacant (vac = 1). Parks and open spaces are treated as developed. During the assessment of each tax lot, no consideration is given to constrained land, suitability for building, or to redevelopment potential. Date of last data update: 2014-04-28 This is official RLIS data. Contact Person: Al Mowbray al.mowbray@oregonmetro.gov 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/3253 Terms of Use: https://rlisdiscovery.oregonmetro.gov/pages/open-database-license
本数据集基于2012年航空影像识别未改良区域，不考虑地块的可开发性与可达性。对于部分已开发的地块，仅纳入面积不小于0.5英亩的未开发区域。 都会区（Metro）空地定义标准如下：所有计税地块均被划分为完全空地、部分空地或已开发地块三类。完全空地计税地块指无任何建筑物、改良设施或可识别土地用途的地块。已开发地块需具备改良设施与明确土地用途，例如铺装停车场属于已开发地块，而停放卡车的未铺装空地则属于空地。 处于场地开发阶段的地块，仅当可见主体结构时才被认定为已开发。例如，土方工程与场地平整仅视为空地，但处于施工阶段的建筑（地基及以上结构）则被认定为已开发。 若某已开发计税地块中存在面积不小于0.5英亩（20000平方英尺）的空置区域，则该地块被认定为部分空地且部分已开发。数据集将围绕包含建筑物、景观庭院等在内的已占用区域绘制多边形，剩余面积大于0.5英亩的区域将被标记为空地（vac = 1）。 公园与开放空间均被视为已开发区域。 在对各计税地块进行评估时，本数据集不考虑受限土地、建筑适宜性以及再开发潜力等因素。 最新数据更新日期：2014年4月28日 本数据集为区域土地信息系统（RLIS）官方数据。 联系人：阿尔·莫布雷（Al Mowbray），电子邮箱：al.mowbray@oregonmetro.gov。通过上述联系人发送邮件是获取回复的最快方式；若您偏好电话咨询，可拨打数据资源中心电话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/3253 使用条款：https://rlisdiscovery.oregonmetro.gov/pages/open-database-license
