What did we do before GPS?

We have been out in the ravines setting up our research plots, we are recreating the plots that were set up in 1977 in order to resurvey the canopy cover by identifying all of the trees over 3 diameters at breast height and the under story vegetation. This will give us a quantitative baseline of tree species composition and allow us to track changes in the ravine. Because the plots are large, 80×50 meters we are setting up 10×10 grids within each plot in order for our resurvey to be manageable and have been lucky enough to be able to use a Trimble GPS system. Using a precise GPS system allows us to accurately plot the grids very quickly, we were able to do four plots in an afternoon, which would have taken us twice as long with a measuring tape and compass, though a compass will always come in handy when you are out in the field.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s