Qgis rocks!
Today I used for the first time qgis and I was impressed!
In my work I don't have much use for extremely accurate mapping tool, I could get by with a screenshot from Google Earth and maybe a pin to identify location, just eyeballing it.
And today I was doing just that, I had to eyeball the location of some small electrical box and conduit by crossreferencing an old electrical schematics, handdrawn, of a railway station. To make sense of it I started to trace the railways and railway switch which were recognizable enough.
But Google earth web started freezing constantly, working on it was impossible. So I searched for a desktop mapping tool.
I was aware of qgis, I already heard talking about from colleagues, but never used before. I imported the kml file of what I've done so far in Google Earth and ready to start tracing.
Not really though, since I had to load the map layer first. So I load both the satellite view and the open street map one. I discover I can overlap the 2 map and give a transparency to one later so both would be visible. What I want to see is mainly the satellite view, but I can see that the railways in the open street map are quite accurate, but the rest of the open street is a bit distracting for my purpose.
So I wonder if can filter only the railways line from the map? Of course I can!
Just install a plug in, and a do a quick query filtered per key: railways. Perfect line tracing, that I can style like I want.
Mind you, using the kml file trip me over: apparently is not a nice format to save edits, so I had to redo work because it got lost after saving. And I spent way more time that I should have to tinker with this or that style. But what a more satisfying experience than manually tracing lines.
What a powerful tool! The future is full of automation possibilities. And it's open source!