地图图形往往具有一定程度的空间结构特征，例如树枝状水系、棋盘状街道网等。
There are many structural units on maps, such as dendriform drainage and orthogonal streets.
基于平面欧几里得图和抽象胞腔复形理论，提出了街道网矢量数据的渐进式表达模型。
A progressive representation model for street networks of vector data was presented based on the theory of plane Euclidean graph and abstract complex cell.
主要有古代、近代建筑、古碑刻以及由南门湾、花街、南正街、儒林街和肖家巷组成的明清传统街道网。
Among them, major sites are the architecture of Ancient Times and Modern Times, the ancient inscriptions on tablets and the traditional street networks formed in Ming and Qing Dynasties.
令人折服地选择了那些狭窄、不平整、弯曲、凸凹、转拐的街道，特别是菜市场那一带，有着象森林一样紊乱的街道网。
The narrow, uneven, sinuous streets, full of angles and turns, were admirably chosen; the neighborhood of the Halles, in particular, a network of streets more intricate than a forest.
从最上面的两张图片中可以看到，左侧边缘地区的土地尚未被开发利用，只有隐约可见的在建街道网，该处地表呈现为米黄色和棕黄色。
Undeveloped land appears along the left edges of the top two images.
在这高大的空间中挂了一张网，男孩子能在上面阅读，并能够完全看到街道和院子里的景观。
Hanging within this tall space is a net where the boys can read, and contemplate with a view to the street and a view to the backyard.
在这高大的空间中挂了一张网，男孩子能在上面阅读，并能够完全看到街道和院子里的景观。
Hanging within this tall space is a net where the boys can read, and contemplate with a view to the street and a view to the backyard.
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