unit

Defining a 'unit'

For json files, the unit is a difficult argument to explain. Do not worry about this if using other file types.

For example, with an input file that looks like this:

[
  {
    "num": "0",
    "text": {
      "name": "title", 
      "num": {
        "no": "0",
        "test": "1"
      }
    }
  }
]

A unit is the following section:

{
  "name": "title", 
  "num": {
    "no": "0",
    "test": "1"
  }
}

The unit can be simply be set to {name: ""} or {num: {}}, and the program will find all data conforming to the unit form from top to bottom. All data in the same level will be included in the unit, and any additional data will be added to the end of each unit.

• A unit is only needed for complex data.

Setting a special unit

With input data like the following:

{
  "year": "2015",
  "data": [
    {
      "name": "Taipei",
      "Lat": 25,
      "Lon": 121
    },
    {
      "name": "Tokyo",
      "Lat": 35,
      "Lon": 139
    }
  ]
}

Set unit to {name: ""}, and year will be added to each unit within data:

"data": [
  {
    "name": "Taipei",
    "Lat": 25,
    "Lon": 121,
    "year": "2015"
  },
  {
    "name": "Tokyo",
    "Lat": 35,
    "Lon": 139,
    "year": "2015"
  }
]

The output file will then be:

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          121,
          25
        ]
      },
      "properties": {
        "year": "2015",
        "name": "Taipei",
        "lon": 121,
        "lat": 25
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          139,
          35
        ]
      },
      "properties": {
        "year": "2015",
        "name": "Tokyo",
        "lon": 139,
        "lat": 35
      }
    }
  ]
}