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Concept
Ballpark
Summary
A ballpark, or baseball park, is a type of sports venue where baseball is played. The playing field is divided into the infield, an area whose dimensions are rigidly defined, and the outfield, where dimensions can vary widely from place to place. A larger ballpark may also be called a baseball stadium because it shares characteristics of other outdoor stadiums.
Baseball field
A baseball field can be referred to as a diamond. The infield is a rigidly structured diamond of dirt and grass containing the three bases, home plate, and the pitcher's mound. The space between the bases and home is normally a grass surface, save for the dirt mound in the center. Some ballparks have grass or artificial turf between the bases, and dirt only around the bases and pitcher's mound. Others, such as Koshien Stadium in Hyōgo Prefecture, Japan, have an infield of entirely dirt.
Two white lines extend from the home plate area, aligned with the first and third bases. These are the foul lines or base lines, usually differentiated by referring to them as the first base line, or the third base line. If a ball hit by the batter lands outside of the space between these two lines or rolls out of this space before reaching first or third base, the ball is "foul" (meaning it is dead and the play is over). If it lands between or on the lines, it is "fair". At the end of the lines are two foul poles, which help the umpires judge whether a ball is fair or foul. These "foul poles" are actually in fair territory, so a ball that hits them on the fly is a home run (if hit on the bounce, it is instead an automatic double).
On either side of home plate are the two batter's boxes (left-handed and right-handed.) This is where the batter stands when at bat. Behind home is the catcher's box, where the catcher and the home plate umpire stand.
Next to the first and third base are two coaches' boxes, where the first and third base coaches guide the baserunners, generally with gestures or shouts.
Official source
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