2010. PA DCNR Bureau of Topographic and Geologic Survey. TILE INDEX North - (2010) Pennsylvania area natural color seamless orthoimagery acquired by Aerials Express at a 45cm pixel-resolution. Flight oper... State of Pennsylvania.
2011. PA DCNR Bureau of Topographic and Geologic Survey. Half meter GSD represented in Geographic Decimal Degrees, natural color (RGB), 8-bit per band digital orthophotography for approximately 14,035 squ... State of Pennsylvania.