如果您使用的是PostgreSQL + PostGIS，这就是我在L4.1中所做的
位置的类型为几何（POINT），使用迁移表中的原始sql查询创建
表：

DB::statement("ALTER TABLE places ADD COLUMN location GEOMETRY(POINT, 4326)");

型号：

class Place extends Eloquent{
     //mass assignment of fillable field
     #fillable
     protected $fillable = array('name', 'attribute', 'location');
     // if you want to include your POINT data as a JSON attribute
     #append
     protected $append = array('location');
     // the DB:raw statement is particular to PostGreSQL + PostGIS, a native function of PostGIS
     // basically, find the id of the referred place
     // and run the PostGIS function that turns the geometry type to wkt text.
     #accessor
     public function getLocationAttribute(){
         $id =  $this->attributes['id'];
         $wkt = DB::table('places')->find( $id, array(DB::raw('ST_AsText(location) AS location')));
         $location = $wkt->location;
         return $location;
     }

 }

使用REST的示例输出如下所示：
{domain}/place/{1}

{
  id: 1,
  name: "Yellowstone",
  created_at: "2014-05-19 08:19:51",
  updated_at: "2014-05-19 08:19:51",
  location: "POINT(121.1 14.4)"
 }

注意事项：
使用默认访问器

$this->attributes['location']

返回一个十六进制对象，而不是一个字符串。所以我选择使用一个原始查询与PostGIS函数。

{
   id: 1,
   name: "Yellowstone",
   created_at: "2014-05-19 08:19:51",
   updated_at: "2014-05-19 08:19:51",
   location: "0101000020E61000006666666666465E40CDCCCCCCCCCC2C40"
 }

在WKT中，我希望你可以使用本地php脚本轻松地返回经度/纬度。：-）
我希望这能让您对如何创建访问器有所了解。

我在模型中使用了全局范围

use Illuminate\Database\Eloquent\Builder;
...
protected static function booted(): void
{
    static::addGlobalScope('geometry', function (Builder $query) {
        $query->select()->selectRaw("(ST_AsText(geo_location)) as geo_location");
    });
}

https://laravel.com/docs/10.x/eloquent#anonymous-global-scopes