I'd call it pretty severe die deterioration/erosion, with the features drawn towards the rim like that.
According to Coins And Canada web site, it's called a " Mortar Set " or like Dave said .. http://www.coinsandcanada.com/coins-prices.php?coin=1-dollar-1996&years=1-dollar-1987-2016
Cool. The first thought in my mind when I first saw one of these was, "Boy, there's gonna be some high-pressure areas at the corners." Wonder if this is a known die pair, or a more generalized phenomena as seen on US issues. Think I'll invoke @SPP Ottawa for he next time he's here. He should have a good idea about them.
Die deterioration, back in 1996 the dies were chrome plated, and the plating often chipped away where the fields met the devices on the dies. This practice of chrome plating the dies started in 1942. Hans Zoell used the term "mortar set" for this phenomenon most commonly seen on the 1943 to 1945 5-cent coins. You also see this on 1986 nickel dollars, and occasionally on 1-cent coins from the 1940s and early 50s. It is also see on the 1944 NFLD 1-cent, so much so, it was called the "Map variety", because it looks like the background fields were like an old map of the world. In 2004, the Royal Canadian Mint implemented a titanium nitride die coating, so you will not see this type of die deterioration on newer coins.
Here is the edge of a 1986 nickel dollar, the matte-like element is raised on the coin, so the chrome plating not only chipped away on the fields, but in the devices too.
Here is a mint state Newfoundland 1944C 'map' variety, which obviously, suffered from poor chromium plating of the dies.
