Thurston Street Address TCOMM

This feature class is maintained in coordination with the addressing authorities of Thurston County Development Services and the Cities of Olympia, Lacey, Tumwater, Yelm, and Rainier. The intent of this data is to provide emergency services with the earliest address plan for new developments even while the development is under construction. Street centerlines are initially digitized from center of right-of-ways shown on survey plats and are then updated when a new orthophoto becomes available. Unnamed roads, driveways, planned roads, alleys are only intended for graphic display. These segments are generally not topologically connected to addressed streets. This feature class is used as the street centerline source for TCOMM911 Operations Center (CAPCOM) CAD/Ti Geo file load and Maverick Map data. As of 1/06, edits in this data regarding exact street name and begin/end address ranges are also entered in the County's Master Street Address Guide through Intrado's 911Net database maintenance request site. Layer/Field Explanation: Street centerlines are initially digitized from center of right-of-ways shown on preliminary plats and updated in final survey plats. If this source is delivered in hard copy, then the document will be scanned and the image georectified using common parcel corners found in the source and in the County parcel layer. Some centerlines are imported directly from digital survey drawings. When a new orthophoto becomes available, the centerlines are reviewed again and adjusted and/or vertex weeded as necessary. Theoretical address ranges are used to extend valid ranges beyond physical addresses. This will influence the positional quality of geocoded points if used as a reference source. It should be noted that the County Development Services Addressing Department does not assign house numbers where the right two digits exceed the number 49. For emergency services, address ranges need to be continuous where the physical street is continuous and maintain 100 block interval changes at intersections. As a result, geocoded points are likely to be skewed toward the lower end of each address range. Zero address ranges will not be used on any name/addressed street types. Any named and signed road without address ranges will default to a 100-199 address range Speed Limit- This attribute was created using the best available information at the time. Use with caution. Limited access segments (I5 and US 101) have been assigned address ranges based on mile post location. Decimal house numbers are not valid so mile post address ranges have been multiplied by 100. CITY_L and CITY_R are used to define msag community, not postal community. Unincorporated areas and those within the City of Olympia are given the community of 'OL'. A list is posted to the County GeoData Center showing unique street names selected by all jurisdictions within the county for addressing officers to consult in selecting street names, http://www.geodata.org/capcom.aspx. Capcom's policy requires that new street names are unique regardless of jurisdiction and street type. Unnamed roads, unofficially named roads, driveways and alleys are identified as TYPE=5. Special characters in street names are not valid. Hyphens are generally replaced with a space character. Forest roads within Capitol Forest are being captured with proper WA DNR road identification based on DNR map. The address range applied to forest roads is based on distance in miles x 100 from the trunk in which branching road extends.本要素类与瑟斯顿县（Thurston County）开发服务局以及奥林匹亚（Olympia）、莱西（Lacey）、塔姆沃特（Tumwater）、耶姆（Yelm）和雷尼尔（Rainier）各市的地址管理部门协同维护。本数据集旨在为应急服务机构提供新建开发项目最早的地址规划方案，即便项目仍处于施工阶段。道路中心线最初从测绘图幅上标注的道路用地红线中心线进行数字化采集，后续在获取新的正射影像（orthophoto）时进行更新。未命名道路、车道、规划道路及小巷仅用于图形展示，此类线段通常与已标注地址的街道不具备拓扑连通性。本要素类可作为TCOMM911运营中心（CAPCOM）的CAD/Ti Geo文件加载及Maverick Map数据的街道中心线数据源。截至2006年1月，针对本数据中精确街道名称及起止地址范围的编辑操作，也将通过Intrado公司的911Net数据库维护申请平台录入至本县的主街道地址指南（Master Street Address Guide）。图层与字段说明：道路中心线最初从初步测绘图幅上标注的道路用地红线中心线进行数字化采集，并在最终测绘图幅中完成更新。若该数据源以纸质形式交付，则会对文档进行扫描，并利用数据源及本县地块图层中共同存在的地块角点对影像进行地理配准（georectified）。部分中心线直接从数字测绘图纸导入。每当获取新的正射影像后，将重新审视中心线，并根据需要进行调整及/或顶点抽稀。采用理论地址范围将有效地址范围延伸至实体地址之外，若将本数据作为参考源，将对地理编码点的位置精度产生影响。需注意，本县开发服务局地址管理部门不会为右两位数字超过49的房屋分配门牌号。针对应急服务需求，实体街道连续的区域其地址范围应保持连续，并在交叉口处维持每100号段的编号变更规则。因此，地理编码点大概率会偏向每个地址范围的低端。任何已命名/已标注地址的街道类型均不会使用零地址范围。任何无地址范围的已命名且有标识的道路，其地址范围将默认设置为100-199号段。限速属性：该属性基于当时可获取的最佳信息生成，使用时请谨慎。有限通行路段（I5与US 101）已根据里程桩位置分配了地址范围。由于小数门牌号无效，因此将里程桩地址范围乘以100进行转换。CITY_L与CITY_R字段用于定义MSAG社区，而非邮政社区。非建制区域及奥林匹亚市范围内的区域，其社区代码均设为“OL”。本县地理数据中心发布了一份列表，收录本县所有辖区选定的唯一街道名称，供地址管理人员在选定街道名称时参考，链接为http://www.geodata.org/capcom.aspx。CAPCOM的政策要求，新街道名称无论所属辖区及街道类型如何，均需保持唯一。未命名道路、非官方命名道路、车道及小巷的类型标识均为TYPE=5。街道名称中不得使用特殊字符，连字符通常会替换为空格。国会森林（Capitol Forest）内的林道将基于华盛顿州自然资源局（WA DNR）的地图，采用规范的WA DNR道路标识进行采集。分配给林道的地址范围基于该林道从主干道路延伸的英里数乘以100计算得出。