"representative fraction" meaning in English

{
  "forms": [
    {
      "form": "representative fractions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "representative fraction (plural representative fractions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Cartography",
          "orig": "en:Cartography",
          "parents": [
            "Geography",
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The scale of a map expressed as a fraction. For example, 1/63,360 or 1:63,360 indicates a scale of one inch to the mile."
      ],
      "id": "en-representative_fraction-en-noun-LLkvzhFt",
      "links": [
        [
          "cartography",
          "cartography"
        ],
        [
          "scale",
          "scale"
        ],
        [
          "map",
          "map"
        ],
        [
          "fraction",
          "fraction"
        ],
        [
          "inch",
          "inch"
        ],
        [
          "mile",
          "mile"
        ]
      ],
      "raw_glosses": [
        "(cartography) The scale of a map expressed as a fraction. For example, 1/63,360 or 1:63,360 indicates a scale of one inch to the mile."
      ],
      "topics": [
        "cartography",
        "geography",
        "natural-sciences"
      ]
    }
  ],
  "word": "representative fraction"
}

{
  "forms": [
    {
      "form": "representative fractions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "representative fraction (plural representative fractions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Cartography"
      ],
      "glosses": [
        "The scale of a map expressed as a fraction. For example, 1/63,360 or 1:63,360 indicates a scale of one inch to the mile."
      ],
      "links": [
        [
          "cartography",
          "cartography"
        ],
        [
          "scale",
          "scale"
        ],
        [
          "map",
          "map"
        ],
        [
          "fraction",
          "fraction"
        ],
        [
          "inch",
          "inch"
        ],
        [
          "mile",
          "mile"
        ]
      ],
      "raw_glosses": [
        "(cartography) The scale of a map expressed as a fraction. For example, 1/63,360 or 1:63,360 indicates a scale of one inch to the mile."
      ],
      "topics": [
        "cartography",
        "geography",
        "natural-sciences"
      ]
    }
  ],
  "word": "representative fraction"
}