I'm new here and this is my first post (hello all) ...that aside, the first thing that I noticed looking at this was that the pond/lake is situated to the north of the bulk of the property - this could lead to some pretty harsh winter winds considering you'd be in zone 4 where the lake will most assuredly ice over. The steep-ish hill on the north side of the lake will help to buffer the wind somewhat, but the winds will definitely whip through from the northwest - the worst. Also, I noticed that there appear to be a lot of marshy looking sections from the topographic map combined with the satellite view... I spent many months studying these types of maps while looking for property myself in a zone 5 region of the northeast US so can tell you, when you see anything like that on those maps, you MUST see the property in person. Many of the properties I thought looked pretty good from above, just maybe a little wet, were actually saturated and often even inundated swamp land.
One more type of map you
should get your hands on is a soil map. In the US we have the
NRCS soil survey data available
online - not sure what the equivalent is in canada or other countries, but sure the data's available. Often times you can get a better perspective of where the water table is (if it's really high, for example), how often an area floods, whether the soil will support some/any of the planting you plan, etc.
Looks like the majority of trees on and surrounding the property are, in fact, conifers, so the soil is likely to be quite acidic to start - not a deal breaker, but definitely something to consider. I'm curious when the land was cleared. The satellite image shows it looking not too badly scarred up, but hard to really tell and there's no way to know when the shot was taken. That's another thing I'd be concerned with if you don't have a good number of photos taken on site and have no way to see it yourself before purchasing.
Overall, I would NEVER buy land that I couldn't see myself, in person, but that's just me I guess
Let us know how it goes