As you are probably aware, one characteristic of the Arctic is the presence of permafrost just below the surface. This icy layer presents difficulty for construction because should this layer melt under a house the ground will sink and structural damage to the building can result.
In recent years, innovative methods to deal with permafrost have resulted. One of these is the use of "cold pipes" that serve to "suck away" heat from the permafrost layer and transfer it to the overlying air. This method seems to be used with large buildings such as schools.
So, the poles in this picture are not meant for flags.
By the way, this construction site is for the new school in Arviat.
Favorite thing: I would suggest that you drop by the schools in Arviat because in some of the elementary grades, children are taught completely in Inuktitut. The schools also regularly have elders on site to help children learn more about their language and culture. This is a very important focus for the Department of Education so teachers and students are encouraged to go on the land and to study things like iglu and kamotik (sled) building and relating that to science and math.