"Hammer projection" meaning in English

{
  "etymology_text": "Described by Ernst Hammer in 1892.",
  "forms": [
    {
      "form": "Hammer projections",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Hammer projection (plural Hammer projections)",
      "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": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Cartography",
          "orig": "en:Cartography",
          "parents": [
            "Geography",
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A certain map projection intended to reduce distortion in the regions of the outer meridians, where it is extreme in the Mollweide projection."
      ],
      "id": "en-Hammer_projection-en-noun--~8XKaFb",
      "links": [
        [
          "cartography",
          "cartography"
        ],
        [
          "map projection",
          "map projection"
        ],
        [
          "Mollweide projection",
          "Mollweide projection"
        ]
      ],
      "raw_glosses": [
        "(cartography) A certain map projection intended to reduce distortion in the regions of the outer meridians, where it is extreme in the Mollweide projection."
      ],
      "topics": [
        "cartography",
        "geography",
        "natural-sciences"
      ]
    }
  ],
  "word": "Hammer projection"
}

{
  "etymology_text": "Described by Ernst Hammer in 1892.",
  "forms": [
    {
      "form": "Hammer projections",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Hammer projection (plural Hammer projections)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Cartography"
      ],
      "glosses": [
        "A certain map projection intended to reduce distortion in the regions of the outer meridians, where it is extreme in the Mollweide projection."
      ],
      "links": [
        [
          "cartography",
          "cartography"
        ],
        [
          "map projection",
          "map projection"
        ],
        [
          "Mollweide projection",
          "Mollweide projection"
        ]
      ],
      "raw_glosses": [
        "(cartography) A certain map projection intended to reduce distortion in the regions of the outer meridians, where it is extreme in the Mollweide projection."
      ],
      "topics": [
        "cartography",
        "geography",
        "natural-sciences"
      ]
    }
  ],
  "word": "Hammer projection"
}