dongyi2993
dongyi2993
2015-12-03 12:30

如何确定位置是否在正方形(lat,lon)PHP内

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How can you figure out if this:

$Now = array(
'lat' => '59.565423',
'long' => '7.347268'
);

is inside this:

$x = array(
'x1' => '59.570281',  // point 1, north west - lat
'y1' => '7.341667',   // ^^^^^^ - lon
'x2' => '59.570281',  // point 2, north east - lat
'y2' => '7.351087',   // ^^^^^^ - lon
'x3' => '59.568195',  // point 3, south east - lat
'y3' => '7.351087',   // ^^^^^^ - lon
'x4' => '59.568195',  // point 4, south west - lat
'y4' => '7.341667'    // ^^^^^^ - lon
 );

Supposed to return 1 if inside or 0 if outside.

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1条回答

  • douxu5233 douxu5233 6年前

    Here is how:

    • first you need to check if longitude is within your |---| area so:

      if($Now['long'] > $x['y1'] && $Now['long'] < $x['y2'])

      • then you need to check if the latitude is within the parameters:

      if($Now['lat'] < $x['x1'] && $Now['lat'] > $x['x4'])

    Whole function:

    function InsideOrNot($Now, $x){
        //If 0 is within |----| (|--0--|)
        if($Now['long'] > $x['y1'] && $Now['long'] < $x['y2']){
    
            //if 0 is within ___
            //                |
            //               ___   
            if($Now['lat'] < $x['x1'] && $Now['lat'] > $x['x4']){
                return 1;
            }
    
            else{
                return 0;
            }
        }
        else{
            return 0;
        }
    
    
    }
    

    Now: echo InsideOrNot($Now, $x);

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