[Xastir] Cropping images

[James Ewen]

> Which radar image are you using?

http://www.flightplanning.navcanada.ca/Latest/anglais/produits/radar/site/whk/Latest-snow_cappi_whk.png

The main weather radar site on the Environment Canada website changes the 
name of the image every ten minutes, so it makes it difficult for one to 
point to the latest image. However, the Nav Canada website nicely uses a 
generic name for the latest image!

I still don't know how to crop! Help!!!

James
VE6SRV