Intelligent Generation and Analysis of the Municipal Road Construction Scheme Based on the KNN Algorithm

Table 3

Five basic topographic features.

Basic terrain	Feature
Mountain	Above 500 meters above sea level, deep valleys and steep slopes
Plain	Below 200 meters above sea level, flat and broad
Plateau	Above 1000 meters above sea level, the undulations are not large, and the edges are steep
Hills	The altitude is above 200 meters and below 500 meters, the slope is gentle, and the terrain height difference is generally less than 200 meters
Basin	Low in the middle, high around