Healthy Forests – Finding Info

Donna Crossland gave a TREPA presentation on November 25th in Yarmouth. This is some additional information springing from that event.

3.3b Easy Instructions on Obtaining Satellite Imagery for One’s Own Area

By Donna Crossland, Healthy Forest Coalition Email / 22 June 2016

[Those that can create these for other areas of the Maritimes for Healthy Forest Coalition are encouraged to email them to Please name the digital as to place and period of time, and, if so desired, by your name.]

 Instructions were given by Donna Crossland after an email of 30 May 2016 which Donna wrote could  be shared which contained the following:

 Crossland, Donna 2016 Images of Gaspereau Lake, Annapolis Valley, Nova Scotia shared 30 May 2016.  Left picture is for 2001 and the bottom one is accumulative from 2001 to 2015.

image  image

Crossland, Donna 2016 Images of Cloud Lake, Annapolis Valley, Nova Scotia shared 30 May 2016.  Top picture is for 2001 and the bottom one is accumulative from 2001 to 2015.

For those previous aerial pictures, blue indicates recent clearcuts just before 2001 and pink indicates clearing for the given years or years span.

“Here’s how I obtained images:

 1. Go to Global Forest Watch http:      //   (*Note, don’t go to the Canadian site for the interactive map, though there are lots of interesting documents there that are worth downloading and reading carefully.  But the interactive map is on the international website.)

2. Choose GFW Interactive Map

3. On the map legend called “Forest Change”, click “tree cover loss” only.  (It’s too confusing to include “tree cover gain”, and besides we know in NS this would constitute the pathetic shrubby forest growth that covers the landscape after a clearcut and does not provide the same ecosystem services as do the intact/mature forests that were removed.)  You can also play with canopy density in the legend.  I haven’t decided on what is the best percentage to show.  The default is 30 %.

4. Zoom to the area you want to see.  (Choose Canada as Country data on the right hand legend that pops up.)

5. The sliding time scale bar can be stopped and you can take a screen shot anywhere.

6. You can also play with base map layers on the right hand legend.  I’d encourage this.

7. When you have images you like simply choose the “print screen command” on your key board.  (Most keyboards have a key somewhere in the very top row of your keyboard that says “print screen” or “PrtScn”.  Press it with “shift” key or “control” key.  There you go!  Paste it into your power point!  Choose two different time periods and you have a nifty comparison.

Obtaining images this way runs the risk of losing some resolution, so try to zoom in as close as you can to what you want to show.  You can always crop the photo a little afterwards to clean up the image.

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