This topographic contour layer was derived from LiDAR collected in spring of 2020 by Dewberry Engineers in coordination with Tallahassee - Leon County GIS. The contours were extracted at a 2 foot interval with index contours every 10 feet. This tile layer was generated as a Map Tile Package (.mtpkx) in ArcGIS Pro and published to ArcGIS online as a hosted tile layer. For web mapping compatibility, this layer has been re-projected from its original coordinate system to the web standard used by ESRI, Google, and Bing (Web Mercator Auxiliary Sphere).The feature layer used to generate this tile layer can be downloaded as a zipped geodatabase from TLCGIS' geodatahub. Download LinkLidar Acquisition Executive SummaryThe primary purpose of this project was to develop a consistent and accurate surface elevation dataset derived from high-accuracy Light Detection and Ranging (lidar) technology for the Tallahassee Leon County Project Area. The lidar data were processed and classified according to project specifications. Detailed breaklines and bare-earth Digital Elevation Models (DEMs) were produced for the project area. Data was formatted according to tiles with each tile covering an area of 5000 ft by 5000 ft. A total of 876 tiles were produced for the project encompassing an area of approximately 785.55 sq. miles.The Project TeamDewberry served as the prime contractor for the project. In addition to project management, Dewberry was responsible for LAS classification, all lidar products, breakline production, Digital Elevation Model (DEM) production, and quality assurance. Dewberry’s Frederick C. Rankin completed ground surveying for the project and delivered surveyed checkpoints. His task was to acquire surveyed checkpoints for the project to use in independent testing of the vertical accuracy of the lidar-derived surface model. He also verified the GPS base station coordinates used during lidar data acquisition to ensure that the base station coordinates were accurate. Please see Appendix A to view the separate Survey Report that was created for this portion of the project. Digital Aerial Solutions, LLC completed lidar data acquisition and data calibration for the project area.SURVEY AREAThe project area addressed by this report falls within the Florida county of Leon.DATE OF SURVEYThe lidar aerial acquisition was conducted from TBDORIGINAL COORDINATE REFERENCE SYSTEMData produced for the project were delivered in the following reference system.Horizontal Datum: The horizontal datum for the project is North American Datum of 1983 with the 2011 Adjustment (NAD 83 (2011))Vertical Datum: The Vertical datum for the project is North American Vertical Datum of 1988 (NAVD88)Coordinate System: NAD83 (2011) State Plane Florida North (US survey feet)Units: Horizontal units are in U.S. Survey Feet, Vertical units are in U.S. Survey Feet.Geiod Model: Geoid12B (Geoid 12B) was used to convert ellipsoid heights to orthometric heights).

Raster Information:• Format: GeoTIFF• Compression: LZW• Cell size (resolution): 200 metres• Pixel type: floating point• Pixel depth: 32 BitSpatial Reference:• Projection: Web Mercator Auxiliary Sphere• Coordinate system: WGS 1984• WKID: 3857If working with ArcGIS Pro, download and apply layer file to render GeoTIFF with a standard symbology.

Raster Information:• Format: GeoTIFF• Compression: LZW• Cell size (resolution): 200 metres• Pixel type: floating point• Pixel depth: 32 BitSpatial Reference:• Projection: Web Mercator Auxiliary Sphere• Coordinate system: WGS 1984• WKID: 3857If working with ArcGIS Pro, download and apply layer file to render GeoTIFF with a standard symbology.

Raster Information:• Format: GeoTIFF• Compression: LZW• Cell size (resolution): 200 metres• Pixel type: floating point• Pixel depth: 32 BitSpatial Reference:• Projection: Web Mercator Auxiliary Sphere• Coordinate system: WGS 1984• WKID: 3857If working with ArcGIS Pro, download and apply layer file to render GeoTIFF with a standard symbology.