Yuma County Arizona and Imperial County California. Colorado River to Laguna Dam
19D
Scanner - Contex SD3600 series and Contex HD5450 Plus Large Format A2 sieres. Software - Nextimage and Adobe Photoshop CS4. Maps sma er than/or equal 14 inches on the long side scanned at 1200 dpi; maps 15-39 inches scanned at 600 dpi; 40 inches or larger scanned at 400 dpi. Bit depth 8; TIFF.
