The above topographic map of Gap and the surrounding area has been derived from satellite mapping. The topographic data has been illuminated by a light source corresponding to the position of the sun at mid afternoon in summer. Major roads, railways rivers and other water features are derived from global GIS data.
But, when we refer to the tone of the passage, it refers to the predominant emotion or absence of it displayed by the author. The tone also reflects the attitude of the author towards a subject or character. Any predominant emotion may, thus become the authorâs tone.
The change in tone between the  octave and the sestet is called a turn, or a volta..       The Shakespearean (also called an  English) sonnet is composed of four  quatrains (of four lines each) and a concluding couplet  (two lines). The rhyme scheme is as follows: abab cdcd efef  gg. Each quatrain serves to develop an element or a facet  of the problem.    For example, a sonnet about the transience of beauty might have one  quatrain about the beloved's charms, one comparing her to the  seasons, and one about how she will eventually die.