The following is an inexpensive “how-to” for making a reliable and functional tool for obtaining accurate measurements in the field. The primary considerations when choosing or constructing a measuring device are size, weight, readability and proper photographic documentation.

Size, because large or bulky items are awkward and can be a hindrance in the field. I have had long items broken on tree limbs and brush while moving through the woods.

Weight is self-explanatory to anyone who has carried an 80 lb. pack through rough terrain. Size and weight considerations vary with location accessibility and trip duration. A day trip within a few hundred yards of a vehicle has different pack considerations than a three-day pack trip.

Readability is important in the field if you want to use your measuring device accurately and with ease. Errors can occur and it is counterproductive if you have to squint, magnify or fiddle with equipment. If it is hard to read with the naked eye, what hope is there of being able to read it on a photograph?

Photographic Documentation in the field is creating a visual record for verifying as much information as possible. Every research related action should have a photo record to go with it.

It has long been a rule of thumb that any item of standardized dimensions, such as paper money or cigarette packs, was an acceptable means of measuring tracks. It is not common knowledge that in order to obtain a semi-accurate measurement from such photographic records, you must take the photograph at a 90-degree angle from the print i.e., directly above. The item then has to be calibrated for known size and compared to the track, which often requires reproducing the item several times and in portions. One of the easiest ways to do this is to carefully cut out the item and the track. Area can also be determined this way by weighing both the item and the track on a scientific scale.