“道路形状和道路类别过滤器”资源的示例似乎暗示 CF 数据映射到当前形状。这是因为 CF 和 SHP 标签是同级的。
<?xml version="1.0" encoding="UTF-8"?>
<TRAFFICML_REALTIME CREATED_TIMESTAMP="2017-06-02T18:10:48Z" MAP_VERSION="" UNITS="imperial" VERSION="3.2" xmlns="http://traffic.nokia.com/trafficml-flow-3.2">
<RWS EBU_COUNTRY_CODE="1" EXTENDED_COUNTRY_CODE="A0" MAP_VERSION="201702" TABLE_ID="7" TY="TMC" UNITS="imperial">
<RW DE="Binford Blvd" LI="107+01100" PBT="2017-06-02T18:10:13Z" mid="1fe417f0-f17e-47b8-b0b0-b67a71eec11d|">
<FIS>
<FI>
<TMC DE="E Kessler Boulevard East Dr" LE="1.5983" PC="8367" QD="-"/>
<SHP FC="3">39.8405,-86.11263 39.84072,-86.11237</SHP>
<SHP FC="3">39.84072,-86.11237 39.8413,-86.11168</SHP>
<SHP FC="3">39.8413,-86.11168 39.84181,-86.11106 39.84235,-86.11039 39.84307,-86.10953 39.84487,-86.10738 39.84663,-86.10527 39.84747,-86.10427 39.84793,-86.10369</SHP>
<SHP FC="3">39.84793,-86.10369 39.84886,-86.10255 39.84949,-86.10172 39.85041,-86.10046 39.85088,-86.09985 39.85137,-86.09926 39.85169,-86.09888 39.85203,-86.09854 39.85237,-86.09821 39.85272,-86.09789 39.85307,-86.09758 39.85343,-86.09729 39.8542,-86.09673 39.85502,-86.09616</SHP>
<SHP FC="3">39.85502,-86.09616 39.85534,-86.09595 39.85631,-86.09528 39.85691,-86.09487 39.85751,-86.09443</SHP>
<SHP FC="3">39.85751,-86.09443 39.85808,-86.09399 39.85836,-86.09379</SHP>
<CF CN="0.97" FF="47.85" JF="1.39455" SP="39.84" SU="39.84" TY="TR"/>
</FI>
<!-- ... -->
</FIS>
</RW>
</RWS>
</TRAFFICML_REALTIME>
这很有用,因为它可以告诉我确切的道路形状及其相应的交通数据。
当流程项目被分成多个部分时,情况并非如此。这是我正在使用的示例 JSON:
...
{
"FIS":[
{
"FI":[
{
...
"SHP":[
{
"value":[
"51.24274,7.13212 51.24311,7.13263 51.2432,7.13277 "
],
"FC":3
},
{
"value":[
"51.2432,7.13277 51.24345,7.13314 51.24363,7.13346 51.24382,7.13381 51.24398,7.13408 51.24408,7.13423 51.24418,7.13436 "
],
"FC":3
},
...
]
"CF":[
{
"SSS":{
"SS":[
{
"LE":1.07,
"SP":50.0,
"SU":52.63,
"FF":49.18,
"JF":0.0
},
{
"LE":0.37,
"SP":25.67,
"SU":25.67,
"FF":26.74,
"JF":0.37504
},
...
如您所见,与前面的 XML 示例不同,CF 段与道路形状分离。
有没有办法解释这些将交通拥堵与道路形状相结合的数据?