20250627 14464700 1.0 TRUE Referral Area Boundary Referral area boundary from Figure3.1: Safety Zones in the 1991 Marin County Airport Land Use Plan for Gnoss Field. Marin County Community Development Agency staff digitized the referral area boundary in February 2024. Cortright & Siebold, Airport Consulting/Engineering/Planning. Digitized by Marin County Community Development Agency.