1. Line

2. Vocabulary Descriptive line: Outline: Contour line:
Lines created with a variety of tools; can be outlines, contour lines, single lines, or hatching.
Outline:
Lines with little variation that describe the outer edges of shapes which appear flat.
Contour line:
Lines that define the outer edges of forms and surfaces within a form such as shapes or wrnkles and folds

3. Vocabulary Hatching: Crosshatching:
Shading using closely spaced, parallel lines used to suggest light and shadow
Crosshatching:
Shading created by crossed parallel lines

4. A line is an identifiable path created by a point moving in space
A line is an identifiable path created by a point moving in space. It is one-dimensional and can vary in width, direction, and length. Lines often define the edges of a form. Lines can be horizontal, vertical, or diagonal, straight or curved, thick or thin. They lead your eye around the composition and can communicate information through their character and direction.

5. In nature…
Line plays an important role in the structure of most natural and human made objects.
In this photo, notice the internal lines as well as the contour lines

6. In nature…

7. Expressive lines Lines give artworks a particular feelin.
What do these lines convey?
In preparation for one of his scrupulously observed paintings of buildings, Pieter Saenredam, known to his contemporaries as the "first portraitist of architecture," made this drawing as the second of two preliminary studies of the choir and north ambulatory of Saint Bavo. He first produced a perspective rendering in October 1634, working on location inside the church. In his studio a month later, Saenredam transformed the life study into this finely tuned, idealized drawing showing the deep vista from one of the side chapels across the nave to another. According to the inscription, he completed his painting after this drawing on October 15, 1635.  Saenredam began the drawing with a series of vertical and horizontal ruled graphite lines that delineate the faces of the side piers and establish a central vanishing point, clearly visible between the figures in the lower center. He then elaborately finished the sheet in pen and ink, wash, and watercolor. Corrections made during this phase included removing two figures from in front of the columns. 
Gary Molitor, Baghdad by the Bay, Computer graphics in wood block style. 72” x 56”

8. S 5 f lines Printed letters and numbers are shapes made with lines
Northern European tourists and collectors in the 1600s and 1700s eagerly acquired pietre dure (hardstone) plaques and mosaic scenes produced by Roman craftsmen on trips to Italy. When the travelers returned home, they had these souvenirs mounted onto boxes and furniture.  The hardstone plaques on this pair of cabinets all date from the late 1600s; they were probably made by Italian craftsmen working in Paris at the Gobelins Manufactory. Because of their value and continued popularity with collectors, these plaques were mounted in cabinets specially designed to hold them, nearly one hundred years after their creation.  The catalogues of two sales held during the French Revolution describe this cabinet. William Beckford, a wealthy English connoisseur of hardstones, probably purchased it in the late 1700s. He may have ordered another cabinet made to match it, with identical gilt bronze mounts and dimensions
Attributed to Adam Weisweiler  One of a pair of cabinets French, Paris, about 1810  Oak veneered with ebony and pewter; set with pietre dure plaques; gilt bronze mounts; portor d'Italie marble tops  H: 3 ft. 4 in. x W: 4 ft. 11 1/8 in. x D: 1 ft. 8 7/8 in.  76.DA.9.1

9. Maps
Lines and shapes on a map are symbols that satnd for other things like interstate highways, roads and riversS

10. Lines in Art .
Art has as many kinds of lines as the lines you find in nature or in books or maps.
Many lines in art are created by moving a tool such as a pencil, charcoal stick, pen or brush.
Henri Matisse, Woman with Folded Hands, ( Pen and india ink on white paper, 10 5/8” x 14 7/16” Minneaplos Institute of Art.

11. Lines in Art . Some lines can even be made with light
Henri Matisse, Woman with Folded Hands, ( Pen and india ink on white paper, 10 5/8” x 14 7/16” Minneaplos Institute of Art.

12. Photography
Picasso’s old trick of painting with light never grows tired…especially with the addition of the digital camera…These were 15 second exposures ‘drawn’ with a bare mini-mag light bulb at 400 ISO. One person stands very still, and behind them, another person draws the outlines really quickly, and since they are moving so fast, they don’t really show up. These were taken in the woods, where Invisiblefellows Paul, Kerry and I hiked the amazing Escarpment Trail in the Catskills (more to come on that). You can see the full images of these light-paintings here:

13. Lines in Art
Descriptive
Implied
Expressive

14. Descriptive lines
can convey energy. Soft, shallow lines that help us understand what we are seeing.
Descriptive lines include:
Outlines
Contour lines
Single lines
And hatching.

15. Implied lines
Are lines that suggest an edge rather than clearly defining one. Implied lines occur where testures, colors, and values change at edges of shapes in artwork
Laocoön and his two sons writhe and struggle, caught in the grip of the serpents that wind among their limbs. The father's large size, powerful musculature, and wild hair and beard contrast with his smaller, smoother-limbed sons. As retold in Greek mythology, the Trojan prince Laocoön angered Apollo by breaking a vow of celibacy he swore to the god and then warning the Trojans not to bring the wooden horse left by the Greeks into the city. To silence him, Apollo sent serpents from the sea to kill him and his sons.  Giovanni Battista Foggini's bronze of this story is based on a famous marble sculpture of the Laocoön unearthed in Rome in The Roman historian Pliny had described this renowned sculpture in awed language, as "a work to be preferred to all that the arts of painting and sculpture have produced." Its celebrity prompted many bronze reductions, or smaller-scale copies including this one, made in Florence. Although it imitates an antique work, the emotionalism and frontality of this bronze are characteristics of the late Baroque Florentine style.  This type of tabletop bronze was often displayed on a cabinet where it served as a souvenir of the "Grand Tour," evidence of its owner's classical education.  x 

16. Expressive lines
When repeated, lines can create a pattern. In this example, the artist repeated different kinds of lines across the composition to create various patterns. Patterned lines also give the image rhythm.
Vincent van Gogh made this drawing in varied hues of golden brown ink as a study of a painting. The vertical composition, whereby forms grow smaller and denser as the eye moves up, leads the eye across the stubble of a newly cut wheat field framed by gathered stacks of wheat. In the center, a man scythes a section of the field while a woman bundles cut wheat under her arm. The background shifts to the cityscape of Arles, where churches and densely packed houses stretch across the horizon. A railroad train and factories churning smoke into the sky signal the dawn of the machine world and its effect on traditional ways of life.  This drawing embodies many of the characteristic features of van Gogh's work: remarkably varied graphic strokes, a subject matter that comments on the human condition, a golden glow that suggests the warm light of southern France, and a balanced yet dynamic composition.
Vincent van Gogh  Arles: View from the Wheatfields Dutch, France, 1888  Reed and quill pens and brown ink 12 5/8 x 9 5/8 in. 

17. Vincent van Gogh Dutch, 1853-1890 Weeping Tree, 1889 Art Institute of Chicago

18. Wheat Field with Cypresses at the Haude Galline near Eygalieres
Vincent van Gogh - 1889  Drawing Height: 47 cm (18.5 in.), Width: 62 cm (24.41 in.)  Van Gogh Museum (Netherlands) 

19. Elizabeth Catlett. American, born 1915
Sharecropper, 1952, printed 1970
Color linocut on cream Japanese paper 450 x 431 mm (block); 544 x 513 mm (sheet) Signed recto, lower right: "Elizabeth Catlett"; inscribed recto, lower left: "A/P Sharecropper" Restricted gift of Mr. and Mrs. Robert S. Hartman,
© Elizabeth Catlett/Licensed by VAGA, New York, NY. Art Institute of Chicago

20. Larry Rivers Portrait of Edwin Denby, 1953 Pencil on paper 16 3/8 x 19 3/4" (41.5 x 50.1 cm) The MUseum of Modern Art, New York City

21. William Kentridge  Seated Couple (Back to Back) 1998 Courtesy Museum of Modern Art New York © 2010 William Kentridge

22. Pablo Picasso, Portrait of Olga in a fur collar, 1923.

23. Pablo Picasso, Head of Marie Therese, 1933