CGDB OVERVIEW The City of Seattle Central Geographic Data Base consists of 5 primary data compilations including the following coverages: Common Land Data Base(CLDB) Parcel Database Street Network Database(SND) Topography Orthophotography --> --> --> --> --> Control, Legal, and PLS Layers Parcel Layer SND Layer Contour, Elevation, and Obscured Layers Digital Orthophotos These are the corporate, shared layers to which all other City GIS layers may be registered. All corporate layers, except the topography layers and orthophotographs, geographically represent the City and its utility service areas. (See tile index for graphic depiction.) The CLDB, Parcel, and Topography based layers in the CGDB are organized by PLSS quarter section. Each quarter section is represented by a "tile" in the CGDB Library. SND is "tiled" by larger spatial units (which may contain as many as 20 quarter sections). CGDB STEWARD: Seattle Public Utilities Information Technology Geographic Information Systems Section Tom Nolan - City GIS Manager Seattle Municipal Tower 700 5th Ave, Suite 4800 Seattle, WA 98104 FORMAT/PLATFORM: Unix: Generated, maintained in Arc/Info v.8.0 format. Distributed in Arc/Info Export format, unless noted otherwise. PC: COORDINATE SYSTEM: DATUM: Selected layers and coverages maintained in 'shapefile' format on City's ArcView 3.x platform Washington State Plane, North Zone Horizontal - North American Datum of 1983,1991 adjustment Vertical - North American Vertical Datum of 1988 NOTE: All GIS data compilations are copyrighted by the City of Seattle and all rights are reserved. U.S. Copyright Act, 17 USC Sec.106 prohibits reproduction, preparing of derivative works, and distributing copies of the data through sale or transfer of ownership by rental, lease or lending.