dissolve.md
In rmapshaper: Client for 'mapshaper' for 'Geospatial' Operations

ms_dissolve.geojson works

{
  "type": "character",
  "attributes": {
    "class": {
      "type": "character",
      "attributes": {},
      "value": ["geojson", "json"]
    }
  },
  "value": ["{\"type\":\"FeatureCollection\", \"features\": [\n{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[102,2],[103,2],[103,3],[102,3],[102,2]]],[[[100,0],[101,0],[101,1],[100,1],[100,0]]]]},\"properties\":{\"rmapshaperid\":0}}\n]}"]
}

{
  "type": "character",
  "attributes": {
    "class": {
      "type": "character",
      "attributes": {},
      "value": ["geojson", "json"]
    }
  },
  "value": ["{\"type\":\"FeatureCollection\", \"features\": [\n{\"type\":\"Feature\",\"geometry\":{\"type\":\"Point\",\"coordinates\":[-95.88780670399409,56.33180646950487]},\"properties\":{\"rmapshaperid\":0}}\n]}"]
}

ms_dissolve.character works

{
  "type": "character",
  "attributes": {
    "class": {
      "type": "character",
      "attributes": {},
      "value": ["geojson", "json"]
    }
  },
  "value": ["{\"type\":\"FeatureCollection\", \"features\": [\n{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[102,2],[103,2],[103,3],[102,3],[102,2]]],[[[100,0],[101,0],[101,1],[100,1],[100,0]]]]},\"properties\":{\"rmapshaperid\":0}}\n]}"]
}

{
  "type": "character",
  "attributes": {
    "class": {
      "type": "character",
      "attributes": {},
      "value": ["geojson", "json"]
    }
  },
  "value": ["{\"type\":\"FeatureCollection\", \"features\": [\n{\"type\":\"Feature\",\"geometry\":{\"type\":\"Point\",\"coordinates\":[-95.88780670399409,56.33180646950487]},\"properties\":{\"rmapshaperid\":0}}\n]}"]
}

copy_fields and sum_fields works

{
  "type": "character",
  "attributes": {
    "class": {
      "type": "character",
      "attributes": {},
      "value": ["geojson", "json"]
    }
  },
  "value": ["{\"type\":\"FeatureCollection\", \"features\": [\n{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[102,2],[103,2],[103,3],[102,3],[102,2]]],[[[100,0],[101,0],[101,1],[100,1],[100,0]]]]},\"properties\":{\"a\":1,\"b\":2,\"rmapshaperid\":0}}\n]}"]
}

{
  "type": "character",
  "attributes": {
    "class": {
      "type": "character",
      "attributes": {},
      "value": ["geojson", "json"]
    }
  },
  "value": ["{\"type\":\"FeatureCollection\", \"features\": [\n{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[102,2],[103,2],[103,3],[102,3],[102,2]]],[[[100,0],[101,0],[101,1],[100,1],[100,0]]]]},\"properties\":{\"a\":6,\"b\":5,\"rmapshaperid\":0}}\n]}"]
}