我有一个 139,000 行的 JSON 文件,其结构基本上如下所示(它是从 OpenStreetMap 中提取的):
{
"type": "FeatureCollection",
"generator": "overpass-ide",
"features": [
{
"type": "Feature",
"properties": {
"@id": "relation/7859",
"TMC:cid_58:tabcd_1:Class": "Area",
"TMC:cid_58:tabcd_1:LCLversion": "9.00",
"TMC:cid_58:tabcd_1:LocationCode": "4934",
"leisure": "park",
"name": "Platnersberg",
"type": "multipolygon",
"@geometry": "center"
},
"geometry": {
"type": "Point",
"coordinates": [
11.128184,
49.4706035
]
},
"id": "relation/7859"
},
{
"type": "Feature",
"properties": {
"@id": "relation/62370",
"TMC:cid_58:tabcd_1:Class": "Area",
"TMC:cid_58:tabcd_1:LCLversion": "8.00",
"TMC:cid_58:tabcd_1:LocationCode": "1157",
"admin_level": "6",
"boundary": "administrative",
"de:place": "city",
"name": "Eisenach",
"type": "boundary",
"@geometry": "center"
},
"geometry": {
"type": "Point",
"coordinates": [
10.2836229,
50.9916015
]
},
"id": "relation/62370"
}
]
}
不是 我想获取此文件中每个要素的名称、TMC 位置代码和坐标,最好是 CSV 文件:
location_code,name,latitude,longitude
我知道我可以制作一个正则表达式,它会剔除所有多余的节点,但这将是一个相当复杂的过程。我还在jq
OpenSuSE Leap 15.1 机器上安装了该工具,但对于该工具我还是个新手。
关于如何完成这项提取工作有什么想法吗?
答案1
我自己也是个新手,但我认为
$ jq -r '.features[] | select(.type == "Feature") | [.properties."TMC:cid_58:tabcd_1:LocationCode",.properties.name,.geometry.coordinates[]] | @csv' file.json
"4934","Platnersberg",11.128184,49.4706035
"1157","Eisenach",10.2836229,50.9916015
应该这样做。过滤select(.type == "Feature")
器可能不是必需的 - 我不确定是否可以使用任何其他类型。