Geological and topographical maps, their interpretation and use, a handbook for the geologist and civil engineer . of the countryat a glance. Many very beautiful maps have been produced inwhich the slope of the ground is indicated by means ofshading, consisting of a number of short strokes drawn atright angles to the slope, and indicating, by their thicknessand relative proximity, the degree of inclination. In amap shaded in this fashion the steepest slope will alwaysbe at right angles to the hachure-lines and the degree 4 GEOLOGICAL AND TOPOGRAPHICAL MAPS of slope will be indicated by the dep
Geological and topographical maps, their interpretation and use, a handbook for the geologist and civil engineer . of the countryat a glance. Many very beautiful maps have been produced inwhich the slope of the ground is indicated by means ofshading, consisting of a number of short strokes drawn atright angles to the slope, and indicating, by their thicknessand relative proximity, the degree of inclination. In amap shaded in this fashion the steepest slope will alwaysbe at right angles to the hachure-lines and the degree 4 GEOLOGICAL AND TOPOGRAPHICAL MAPS of slope will be indicated by the depth of the shadingwhich they produce. Another system of shading is by drawing the hachuresin the direction of the slope, and in this case also thedepth of the shading will be proportional to the angle ofthe slope. Examples of the two types of shading just describedare given in Figs. 2 and 3. Hachure lines alone give but little indication of therelative heights of different parts of the surface, theheavily shaded hill being frequently less in altitude thanone bearing but few hachures, owing to the low angle ofcu31924003897729. 17
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeology, booksubjectt
