According to the characteristics of the road network, the hybrid road network can combine the three forms of road network
Intersection
Village center
Number of village center areas
It is generally the public activity center of the village, and the road density of the village public center will be higher than that of other areas
Capture distance
Minimum distance between road intersections
Calculate the distance between each intersection and take the minimum value
Intersection ratio
The ratio between the number of major road nodes and the number of intersections
Minimum angle of intersection
Minimum angle of road intersection
Statistical minimum angle value of road intersection
Road length
Longer road length
Average over longer set of roads
Calculate the average of all road lengths, select the roads that are greater than the length as set A, select the roadsthat are smaller as set B, find the roads greater thanas set A, and the average length of set B is the longer road length. Greater thanis replaced by less thanvalue for shorter road length
Shorter road length
Average over set of shorter roads
Longer road elastic zone
The range within which the length of longer roads can fluctuate
The average of the absolute values of the maximum and minimum values in set A can be selected to obtain the longer road elastic interval , and similarly, the shorter road elastic intervalcan be obtained
Shorter road elastic zone
Shorter road lengths can fluctuate
Road width
Main road width
Average width of main road
Determine the road grade, select three points in a section of road to calculate the average width of the road, calculate the average width of the main road , the width of the secondary road, and the width of the street ; calculate the difference between ,, and and the maximum and minimum values of the road width. The average absolute value of the road elasticity interval ,, and
Secondary road width
Average width of secondary roads
Main road elastic zone
The main road can float up and down the flexible range
Secondary road elastic zone
The flexible interval that the secondary road can float up and down
Road declination maximum
Smaller value of angle between roads
Count the number of smaller angles at the intersection of two roads, remove extreme values, and take the maximum value as the “maximum road declination angle”
Number of roads
Number of road segments
Through the Douglas-Peucker algorithm, the arc road is decomposed into segments of straight roads, and the total number of roads is counted