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# やりたい事

`DMS(※1)形式` から `Degree形式` に変換したい

つまりタイトル通り `60進数 to 10進数` をしたい
10進数 to 60進数も↓の方で実装してます

e.g.) 東京の緯度経度
DMS形式 [35度39分10.1952秒, 139度50分22.1208秒]

Degree形式 [35.652832, 139.839478]

※1 Degree Minute Second の略

# 実装

```interface PointInDMS {
lat: DMS;
lng: DMS;
}

interface PointInDegree {
lat: number;
lng: number;
}

interface DMS {
degree: number;
minute: number;
second: number;
}

const degreeMinuteSecond2Degree = (pointInDMS: PointInDMS): PointInDegree => {
return {
lat:
pointInDMS.lat.degree +
pointInDMS.lat.minute / 60 +
pointInDMS.lat.second / 60 / 60,
lng:
pointInDMS.lng.degree +
pointInDMS.lng.minute / 60 +
pointInDMS.lng.second / 60 / 60
};
};

export const main = () => {
// 東京
const tokyoPoint: PointInDMS = {
lat: { degree: 35, minute: 39, second: 10.1952 },
lng: { degree: 139, minute: 50, second: 22.1208 }
};
console.log({ tokyoPoint });

const deg: PointInDegree = degreeMinuteSecond2Degree(tokyoPoint);
console.log({ deg });
};

main();
```

# 実行結果

```{
tokyoPoint: {
lat: { degree: 35, minute: 39, second: 10.1952 },
lng: { degree: 139, minute: 50, second: 22.1208 }
}
}
{ deg: { lat: 35.652832, lng: 139.839478 } }
```

# 逆もやってみた

`10進数 to 60進数`

```interface PointInDMS {
lat: DMS;
lng: DMS;
}

interface PointInDegree {
lat: number;
lng: number;
}

interface DMS {
degree: number;
minute: number;
second: number;
}

const degreeMinuteSecond2Degree = (pointInDMS: PointInDMS): PointInDegree => {
return {
lat:
pointInDMS.lat.degree +
pointInDMS.lat.minute / 60 +
pointInDMS.lat.second / 60 / 60,
lng:
pointInDMS.lng.degree +
pointInDMS.lng.minute / 60 +
pointInDMS.lng.second / 60 / 60
};
};

const degree2DegreeMinuteSecond = (pointInDMS: PointInDegree): PointInDMS => {
const d2dms = (degree: number): DMS => {
const minuteSecond = parseFloat("0." + degree.toString().split(".")[1]) * 60;
return {
degree: Math.trunc(degree),
minute: Math.trunc(minuteSecond),
second: parseFloat("0." + minuteSecond.toString().split(".")[1]) * 60
};
};

return {
lat: d2dms(pointInDMS.lat),
lng: d2dms(pointInDMS.lng)
};
};

export const main = () => {
// 東京
const tokyoPoint: PointInDMS = {
lat: { degree: 35, minute: 39, second: 10.1952 },
lng: { degree: 139, minute: 50, second: 22.1208 }
};
console.log({ tokyoPoint });

const deg: PointInDegree = degreeMinuteSecond2Degree(tokyoPoint);
console.log({ deg });

const dms: PointInDMS = degree2DegreeMinuteSecond(deg);
console.log({ dms });
};

main();
```

```{
tokyoPoint: {
lat: { degree: 35, minute: 39, second: 10.1952 },
lng: { degree: 139, minute: 50, second: 22.1208 }
}
}
{ deg: { lat: 35.652832, lng: 139.839478 } }
{
dms: {
lat: { degree: 35, minute: 39, second: 10.1952 },
lng: { degree: 139, minute: 50, second: 22.1208 }
}
}
```
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