20260616 12371500 1.0 TRUE 1937 Milwaukee County 1937 Aerial greyscale non-ortho-rectified vertical aerial photography covering Milwaukee County Wisconsin; captured July 1937; resolution is 36 inches per pixel; source 9 inch x 7 inch 1:20,000 prints were scanned at 600 pixels per inch and georeferenced via third-order polynomial transformation using high-resolution ortho-rectified imagery as reference aerial_1937