Green City Landscape Design and Planning Based on GIS and Analytic Hierarchy Process Model
Table 1
Categories of different data.
Data name
Specific introduction
Vector data
The data precision is high, the storage capacity is small, and the operation is fast. The way to express the position of spatial objects is to write down the coordinates and spatial relations of spatial objects. Vector map data is composed of geometric data of geographical elements and attribute data.
The accuracy of data expression is low and the amount of data is large. Its graphics operation is simple and inefficient. However, its digital simulation is easy, cheap and easy to achieve data sharing, and the remote sensing image format is close to the same. The data structure is mainly represented by regular pixel array.
Irregular triangulation
Abbreviated as “TIN” [19]. It is a special data structure, which is between vector data and raster data. It represents the terrain surface by connecting a bunch of non-overlapping and non-intersecting triangular surfaces.
