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Hatching (French: hachure) is an artistic technique used to create tonal or shading effects by drawing (or painting or scribing) closely spaced parallel lines. When lines are placed at an angle to one another, it is called cross-hatching .
Kevin Sprouls, a "hedcut" autoportrait. Hedcut is a term referring to a style of drawing associated with The Wall Street Journal half-column portrait illustrations.. The newspaper staff uses the stipple method of many small dots and the hatching method of small lines to create an image, and are designed to emulate the look of woodcuts from old-style newspapers, and engravings on certificates ...
The ISO 128 replaced the previous DIN 6 standard for drawings, projections and views, which was first published in 1922 and updated in 1950 and 1968. ISO 128 itself was first published in 1982, contained 15 pages and "specified the general principles of presentation to be applied to technical drawings following the orthographic projection methods".
SIA 2014 (1996), Swiss standard for engineers and architects, based on ISO 13567. ÖNORM A 6240-4 (2012), Austrian standard for digital documentation in technical drawings, based on ISO 13567. Samples of standardized layers: A-B374--E- (ISO13567: agent Architect, element Roof window in SfB, presentation graphic element);
A PDF file may be encrypted, for security, in which case a password is needed to view or edit the contents. PDF 2.0 defines 256-bit AES encryption as the standard for PDF 2.0 files. The PDF Reference also defines ways that third parties can define their own encryption systems for PDF.
Another route to convert a PS or EPS file (postscript) in PNG is to use ImageMagick, available on many operating systems. A single command is needed: convert -density 300 file.ps file.png The density parameter is the output resolution, expressed in dots per inch. With the standard 5x3.5in size of a gnuplot graph, this results in a 1500x1050 ...
An engineering drawing is a type of technical drawing that is used to convey information about an object. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing.
Line art or line drawing is any image that consists of distinct straight lines or curved lines placed against a background (usually plain). Two-dimensional or three-dimensional objects are often represented through shade (darkness) or hue . Line art can use lines of different colors, although line art is usually monochromatic.