Hatching is a technique used by artists to create tonal or shading effects in their drawings. Cross hatching and contour hatching are two of the 6 basic hatching techniques. Cross hatching uses <span>fine parallel lines drawn closely together to create the illusion of shade or texture in a </span>drawing. A<span>fter laying down one pass of hatch marks, another set of hatch marks are drawn on top, usually in a perpendicular or near-perpendicular direction to the first set. </span>While in contour hatching<span> there is only one set of hatch marks, and these are lines follow the contours of the subject. </span>
Because it show how life us that was in the past
Compression as a TIFF file, suing the LZW algorithm, produces a negligible reduction to 252kbytes. Better results are achieved by saving in Portable Network Graphics (PNG) format, a relatively new file format with a more efficient lossless algorithm which compresses the file to 172kbytes (66%). I hope this helped. I added a link to a book that I received this information from.
https://books.google.com/books?id=qzw52L7lb-sC&lpg=PA266&ots=hTOXjJTE8C&dq=Which%20file%20format%20a...
