City of SeaTac Street Network Inside City. Unique ID, SEGID, is used for link to several related tables containing pavement, sidewalk, snowplow and other data. This data is based on centerline data curated by the City of SeaTac, which includes King County road classification information. KCCLASS field is the road classification (data likely originated with King County road data), the values are defined as such:

• C = Collector Arterial
  
• F = Freeway
  
• L = Local Arterial
  
• M = Minor Arterial
  
• P = Principal Arterial
  

Incorporated in February 1990, the City of SeaTac is located in the Pacific Northwest, approximately midway between the cities of Seattle and Tacoma in the State of Washington. SeaTac is a vibrant community, economically strong, environmentally sensitive, and people-oriented. The City boundaries surround the Seattle-Tacoma International Airport, (approximately 3 square miles in area) which is owned and operated by the Port of Seattle.