 This study used remote sensing methods to monitor permafrost change in northern Ontario, specifically focusing on the southern portion of the discontinuous permafrost zone. The study area was located near Victor Diamond Mine and at Orwapiskat First Nation, and vegetation signatures, texture, and circular two elongated shapes were used to detect pulsars and peak plateaus. Changes in permafrost degradation and aggregation were mapped using object-based image analysis on orthorectified air photos from 1954 to 1955 and worldview, two satellite imagery acquired in 2011. Field validations were conducted through aerial and ground surveys in 2014 and 2016. The resulting change map demonstrated that permafrost degradation is leading over aggregation in the area with a decrease in permafrost area from 4.5% in 1954 to 3.3% in 2011. Accelerated pulsar degradation was linked to proximity to streams. This article was authored by Slatka Poronkova. We are article.tv, links in the description below.