How do I find the missing view points, free parts and such on the map?

[bubapuuppala]

Hi,

I've found most of the donut places, free part trucks, hiding places and such that are marked on the map but I'm still missing some. The map still shows all of them, even the ones I've found and the icons look all the same. How can I see which ones have already been found and which ones are the ones I should still go to? 

[bubapuuppala]

I understood the map wrong. I didn't see all the markings yet. I could see the ones I had already gotten and also the ones I had already found but not taken yet. Because of this, I thought I had all the markings already on map, which I didn't. I found the last spots and now all the markings are shown on my map. Maybe this will be of help to someone else pondering the same thing.