graticule4.vl

{
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "height": 300,
    "layer": [
        {
            "data": {
                "sphere": true
            },
            "mark": {
                "fill": "aliceblue",
                "type": "geoshape"
            }
        },
        {
            "data": {
                "graticule": {
                    "stepMinor": [
                        15,
                        30
                    ]
                }
            },
            "mark": {
                "filled": false,
                "strokeWidth": 0.3,
                "type": "geoshape"
            }
        }
    ],
    "projection": {
        "rotate": [
            -42,
            -30,
            0
        ],
        "type": "orthographic"
    },
    "width": 300
}