Abstract: An image of two men examining a three-dimensional map showing water sources and possibly the Tryweryn Dam scheme while it was still secret.
Part of: Casgliad Geoff Charles Collection,
Charles, Geoff, 1909-2002.
Title assigned by cataloguer., The image has been published and appeared in Wrexham Star, c. 1952.
Computer file. Aberystwyth : National Library of Wales, 2000-2002 (Geoff Charles digitisation project) Original, master file captured in uncompressed TIFF format. Minimal tonal adjustments using levels and curves in PhotoShop. Master files archived as pc format TIFFS. On-screen display files resized and adjusted for viewing on gamma 2.2 monitors in PhotoShop and saved in JPEG format. 1 image file; Heidelberg Nexscan F4100 capture device using Linocolor v6.0.4 software. Filter settings: light contour-0.5, dark countour-0.5, smoothnes-0.6, countour width-1.0, scan spot size-4.0. Target resolution for hi-res capture was 300dpi at a factor of 450% resulting in +/- 6000 x 5000 pixels; screen res:+/- 600 x 500 pixels at 72dpi; screen-res and thumbnail copies use jpeg compression at setting: 7 in Adobe Photoshop v6.0; 8 bit grayscale; hi-res TIFFs: Gray Gamma 1.8 icc profile embedded.
2002 ; scanned. Reprographic Unit, National Library of Wales, Aberystwyth, Ceredigion ; capture device operator : Kate Harper.