Who uses a shadow map

The same question, asked for different reasons: where will the light be, and when.

Golden hour on an open field is easy to predict. Golden hour on a street is a question about buildings, and that is the question this answers.

Estate agent photos are taken on the best afternoon of the year. This gives you the other three hundred and sixty four days.

A square that is perfect at two is half in shadow by five. Knowing which half, and when, is the difference between a good site plan and a guess.

Full sun, partial shade, deep shade. Plant labels assume you already know which one you have, and most gardens have all three.