Connecticut Road

Connecticut Roads and Trails is 1:24,000-scale base map data. It depicts the location of all roads and trails published on the USGS topographic quadrangle maps. For base map purposes, use this layer with other 1:24,000-scale base map data such as Hydrography, Railroads, Airports, and Towns. The Roads and Trails layer includes information within Connecticut and is derived from the Roads and Trails Master layer, which includes all road and trail features depicted on all of the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps that cover the State of Connecticut. This layer may be used as a possible data source for other 1:24,000-scale layers having features that should coincide with the roads and trails on the USGS topographic quadrangle maps. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.) Connecticut Roads and Trails is a 1:24,000-scale, feature-based layer that includes road and trail features on the U.S. Geological Survey (USGS) 7.5 minute topographic quadrangle maps for the State of Connecticut. This layer only includes features located in Connecticut. The layer is based on information from USGS topographic quadrangle maps published between 1969 and 1984 and does not represent the road network in Connecticut at any one particular point in time. The layer does not depict current conditions and excludes many roads that have been built, modified, or removed since the time these topographic quadrangle maps were published. The layer includes Interstate highways, US routes, state routes, local roads, unpaved roads, traffic circles, bridges, cul-de-sacs, trails, etc. It does not include route number, street name, house address, traffic direction, or traffic volume information for these features. Nor does it represent a complete or current network of hiking trails. Features are linear and represent road centerlines. Attribute information is comprised of codes to cartographically represent (symbolize) road and trail features on a map. This layer was originally published in 1994. The 2005 edition includes the same road features published in 1994, but the attribute information has been slightly modified and made easier to use.康涅狄格州道路与小径（Connecticut Roads and Trails）为1:24000比例尺的底图数据，用于标注美国地质调查局（USGS）地形分幅图上刊载的全部道路与小径的位置。若作为底图使用，可将该图层与水系（Hydrography）、铁路、机场、城镇等同为1:24000比例尺的其他底图数据配合使用。 本图层仅涵盖康涅狄格州范围内的信息，其数据源为覆盖该州全域的美国地质调查局（USGS）7.5分钟地形分幅图上标注的全部道路与小径要素所构成的道路与小径主图层。该图层可作为其他1:24000比例尺图层的潜在数据源，这类图层的要素需与USGS地形分幅图上的道路与小径要素保持空间匹配。 本数据集不适用于比例尺大于或精度高于1:24000（即1英寸=2000英尺）的印刷地图。 康涅狄格州道路与小径为基于要素的1:24000比例尺图层，涵盖覆盖康涅狄格州的USGS 7.5分钟地形分幅图上的道路与小径要素，且仅包含该州境内的相关要素。本图层基于1969年至1984年间发布的USGS地形分幅图数据，无法反映康涅狄格州在任意特定时间点的道路网络状况，亦无法体现当前道路实际情况，未纳入自上述地形分幅图发布以来新建、改建或拆除的大量道路。 图层涵盖州际公路、美国国道、州道、地方道路、未铺装道路、环岛、桥梁、尽端路（cul-de-sacs）、徒步小径等要素，但未包含上述要素的路线编号、街道名称、门牌号、通行方向或交通流量信息，同时也未完整呈现当前的徒步小径网络。所有要素均为线状，代表道路中心线。属性信息由用于在地图上以制图方式符号化表达道路与小径要素的编码构成。 该图层最初发布于1994年，2005版保留了1994版的全部道路要素，但对属性信息进行了小幅优化，提升了易用性。