 In forestry, we commonly measure horizontal distance with a loggers tape or an open reel tape. These can be at various lengths, but 50, 75, or 100 foot lengths are common. When measuring horizontal distance, it's best to get a tape that measures in feet and tens of feet. This allows for decimal recording of measurements. It is also important to know where the zero mark is on your tape. For example, the zero mark may be at the end of the loop found at the end of the tape or it may be marked further up. Taking a few minutes to familiarize yourself with the measuring tape you have will help you make more precise measurements in the field.