Topographic Contours 2015 - Download

This downloadable zip file contains an ESRI File Geodatabase (FGDB) that is compatible with most versions of ArcGIS Pro, ArcMap, and AutoCAD Map 3D or Civil 3D. To view the geodatabase’s contents, please download the zip file to a local directory and extract its contents. This zipped geodatabase will require approximately 1.57 GB of disc space (1.73 GB extracted). Due to its size, the zip file may take some time to download. The geodatabase in the download includes the following layers: 2 foot contours, Spot Elevations, Breaklines 2015 LiDAR derived 2ft topographic contours for Tallahassee and Leon County, Florida. Topographic contours re-projected from NAD83 State Plane to Web Mercator. Source data vertical datum NAVD88. TLCGIS regularly uses digital orthophotos and planimetric/hydrographic/topographic data to support regulatory functions, land management and acquisition, planning, engineering and habitat restoration projects. This dataset is part of a regularly scheduled update of LiDAR and digital orthophotography products. The dataset was created from source imagery acquired by a Trimble TAC80 natural color digital camera and LAS data acquired by a Optech ALTM HA500 (Pegasus) LIDAR sensor from January 18, 2015 to February 5, 2015.本可下载压缩文件包含一个ESRI文件地理数据库（ESRI File Geodatabase, FGDB），兼容多数版本的ArcGIS Pro、ArcMap以及AutoCAD Map 3D或Civil 3D。若要查看该地理数据库的内容，请将此压缩文件下载至本地目录并解压其内容。该压缩地理数据库占用磁盘空间约1.57 GB，解压后占用空间约1.73 GB。由于文件体积较大，该压缩文件的下载可能需要一定时间。本下载包中的地理数据库包含针对美国佛罗里达州塔拉哈西市与利昂县的以下图层：2英尺等高线、高程点、断线，以及2015年由激光雷达（Light Detection and Ranging, LiDAR）生成的2英尺地形等高线。该地形等高线已从NAD83国家平面坐标系重投影至Web Mercator坐标系。源数据的垂直基准面为NAVD88。TLCGIS 常规使用数字正射影像、平面、水文及地形数据，以支撑监管履职、土地管理与征收、规划设计、工程实施及栖息地修复等各类项目。本数据集属于激光雷达与数字正射影像产品定期更新计划的一部分。本数据集的源数据采集自2015年1月18日至2月5日期间，其中影像由Trimble TAC80天然色彩数码相机采集，LAS格式数据由Optech ALTM HA500（Pegasus）激光雷达传感器采集。