我想使用Traffic Flow API-“边界框内的流量”获取车辆平均速度的数据。
在这里看到的示例(https://developer.here.com/api-explorer/rest/traffic/traffic-flow-bounding-box)是
"TMC": {
"PC": 32483,
"DE": "SOHO",
"QD": "+",
"LE": 0.71306
},
"SHP": [],
"CF": [
{
"TY": "TR",
"SP": 8.44,
"SU": 8.44,
"FF": 15.8,
"JF": 3.15577,
"CN": 0.98
我对大约3个标签感到困惑。在较早的帖子中,有人在此处发布了标签的含义 Interpreting HERE Maps real-time traffic tags
我正在专门查看速度标签,即
"FF" = The free flow speed on this stretch of road.
"SP" = Speed (based on UNITS) capped by speed limit
"SU" = Speed (based on UNITS) not capped by speed limit
有人可以解释这三个之间的区别吗?
在某些示例中,“ SP” /“ SU”大于“ FF”吗?
例如(将坐标45.0395,7.6116; 45.0224,7.6611输入bbox)
"TMC": {
"PC": 14176,
"DE": "Mirafiori",
"QD": "+",
"LE": 0.60245
},
"SHP": [],
"CF": [
{
"TY": "TR",
"SP": 41.4,
"SU": 56.3,
"FF": 40.4,
"JF": 0,
"CN": 0.94
答案 0 :(得分:0)
“ FF” =这表示应认为车辆能够无障碍行驶的路段上的速度。该速度被计算为非高峰时段观察到的速度的百分比。
“ SP” =当前行驶的平均速度,由速度限制限制。
“ SU” =当前行驶的平均速度,不受速度限制的限制