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从轮廓线测量床倾角,线路选择哪一个?

测量倾角的床上,我选择的任何2等值线穿过床,然后项目线和测量角度(我假设这是标准的技术,不需要解释)

在这里输入图像描述

但似乎与我真正的世界地图(至少)倾斜角度的变化很大程度上取决于我选的轮廓,那么我该如何选择轮廓选择哪一个?

回答

你是正确的说,倾斜角度变化很大程度上取决于你选择的轮廓。相比人工地图设计,为学生传授基本的构造地质学(比如你添加到你的问题),自然地图很少“好和友好”计算。有几个原因:1。倾斜的角度会有所不同。在人工地图,床通常表格而不是折叠(除非这是一个折叠运动)。天然岩石很少完全平面和表格,其厚度也不同。这可以导致不同的下降顶部和底部的床上在同一位置。2。地图通常不画与倾角的计算。联系人是基于有限的暴露可以映射的地质学家。 The contacts between rock units may be obscured by vegetation, talus, soil and even houses and roads. Making a map that is dip-calculation friendly is time consuming, if possible at all. 3. It also depends on the accuracy of the topographic contours. As you probably know, you have to take the elevation into account in these calculations. Even if the contours are accurate, the topography may be not accurate or not spaced properly. I can testify from my own experience that the topographic map that was available to me of this area: ![enter image description here][1] seems like we are walking on a somewhat planar area without any steep slopes and only several meters of variability in elevation. So what are your options? Some maps already have dip measurements built into them, thanks to the detailed work of the mapping geologist. If not, some structural maps of the same area may be available from the local geological survey/society. If you insist in making your own calculations, and the bed is rather planar, you can try to use a wider area for calculation (let's say 1 km instead of 100 m). You can try to take many measurements over an area and make a histogram of the measurements, or maybe examine the spatial distribution. [1]: http://i.stack.imgur.com/z8MA3.jpg

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