Objective: "SWBAT scale up their reference photograph to a drawing that is 200% in size, keeping all features in proportion using the grid method"
VOCABULARY: Grid method: A method for enlarging a small design to a full size, it involves drawing a grid of squares over the small picture,a similar grid of larger squares is then drawn where the art will go and the design is copied, square by square, into the full size version.
in proportion: the relation of one part to another or to the whole with respect to magnitude, quantity, or degree.
scale up: an increase according to a fixed ratio
Sometimes you have the perfect image to draw or paint but it's too small. An easy way to transfer the image to your drawing paper or canvas and increase it's size to what you want, is to use a grid.
The definition of a grid is a pattern of horizontal and vertical lines spaced out at regular intervals, forming squares or rectangles. The lines on graph paper are an example of a grid.
The grid method is a valuable tool to reproduce and/or enlarge an image that you want to paint or draw. While the process is not as quick as using a projector or technology, it does have the added benefit of helping to improve your drawing and observational skills. In a nutshell, the grid method involves drawing a grid over your reference photo, and then drawing a grid of equal ratio on your work surface (paper, canvas, wood panel, etc). Then you draw the image on your canvas, focusing on one square at a time, until the entire image has been transferred. Once you're finished, you simply erase or paint over the grid lines, and start working on your painting, which will be now be in perfect proportion!
To use the grid method, you need to have a ruler, a paper copy of your reference image, and a pencil to draw lines on the image. You will also need a work surface upon which you will be transferring the photo, such as paper, canvas, wood panel, etc. To draw the grid lines on paper, I would recommend using a mechanical pencil, so that you can get a thin, precise line. Be sure to draw the grid very lightly, so that you can easily erase it when you are finished.
Your reference photo will have a 1/2 inch grid superimposed over the image and your drawing paper will have a 1" grid drawn on it. You will be enlarging your photo 200% when you draw it.
Draw the grid using a ruler and make 1" marks on all 4 sides of the 12x18" paper, and connect the marks. Number the squares across the top 1 through 12 and down 1-18. Using the grid coordinates as reference, you will plot the points where an edge or a line in the reference photo intersects the grid on the drawing paper. In math, to plot a point is to locate points on a graph by means of coordinates.
Watch my powerpoint below if you missed the lesson in class about this: