jqコマンドでGeoJSONから特定のプロパティを削除する

GeoJSONを生成してから「あのプロパティいらんかったなー。あれだけ削除したいなー」ってときに使う。

cat example.geojson | jq "del(.features[].properties.＜消したいkey＞)" > example2.geojson 

サンプル

下記GeoJSONデータからnameを削除する

input

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          0,
          0
        ]
      },
      "properties": {
        "label": "hoge",
        "name": "hoge", //これ削除したい
        "address": "tokyo"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          10,
          10
        ]
      },
      "properties": {
        "label": "test",
        "name": "test", //これ削除したい
        "address": "takasaki"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          20,
          20
        ]
      },
      "properties": {
        "label": "foo",
        "name": "foo", //これ削除したい
        "address": "tokyo"
      }
    }
  ]
}

jqを使ってnameプロパティを削除する

cat input.geojson | jq "del(.features[].properties.name)" > output.geojson

実行結果

output

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          0,
          0
        ]
      },
      "properties": {
        "label": "hoge",
        "address": "tokyo"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          10,
          10
        ]
      },
      "properties": {
        "label": "test",
        "address": "takasaki"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          20,
          20
        ]
      },
      "properties": {
        "label": "foo",
        "address": "tokyo"
      }
    }
  ]
}