| Line and area levelling |
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In Example 4 a combined area and line levelling is shown. Several new points were measured as intermediate sights within a levelling distance from one instrument position. When noting the readings, pay attention to the correct sequence within an instrument position: First write down the backsight (= foresight of the previous instrument standpoint, here TP 2), then the intermediate sights and then the foresight (= backsight of the next following instrument position, here TP 3). It should be mentioned though that points determined by means of an intermediate sight will not checked. |
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Example 4 
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