Monday, August 31, 2026

Sight Scaling

Sometimes the area of interest I want to sketch is so distant and apparently small that it would be impossible to draw at sight size. Some years ago I devised this hack to scale it up, which I got to pull out of the toolbox yesterday to do this charming little village on the water on Cape Cod.

To start I rotated the sketchbook to the vertical orientation with the left end on top. Using CerviCarneTable to hold it at a constant distance from my eye, I made little tick marks indicating salient features on the edge of the paper. A few were labeled with initials, e.g. LH for Light House, BD for Big Dune, and LD for Little Dune.

Pencil sketch of lighthouse and houses on water with tick marks, diagonal line and horizontal and vertical guidelines to assist in placing features on the page

I then rotated it back to horizontal, drew a diagonal from the lower left to upper right, and used a straight edge to draw horizontal lines from each tick mark to its intersection with the diagonal. Drawing vertical lines through each intersection gave me a scaled up set of reference points to place the buildings and other features on the page. I arbitrarily placed the horizon line about a third of the way up and eyeballed the proportions.

The first photo shows the relative size of the village in my overall field of view; the second shows it zoomed in to approximately the angle of vision implied by the sketch.


Turns out that that little village has an interesting history: https://www.capecod.com/lifestyle/sandy-neck-historic-colony-sandy-spit/