名词
中文翻译：等值地图
同义词：
['isopleth map', 'isovalue map', 'isovalue contour map']
例句：
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1. Thechoropleth map shows the distribution of population density across the region.
等值地图显示了该区域人口密度的分布情况。
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2. The isopleth map was used to identify areas with high and low levels of pollution.
等值线图被用来识别污染水平高和低的区域。
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3.The isovalue contour map helps in understanding the spatial patterns of temperature variations.
等值线图有助于理解温度变化的空间模式。