Describir: Essentials of aerial surveying and photo interpretation

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| || | || | || | ||  /_____//  |  ___||  | |/ //   / _ \\   / ____||   / _ \\  
| || | || | || | ||  `____ `   | ||__    | ' //   | / \ || / //---`'  | / \ || 
| \\_/ || | \\_/ ||  /___//    | ||__    | . \\   | \_/ || \ \\___    | \_/ || 
 \____//   \____//   `__ `     |_____||  |_|\_\\   \___//   \_____||   \___//  
  `---`     `---`    /_//      `-----`   `-` --`   `---`     `----`    `---`   
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