Adventures in GIS
I’ve been playing around with QGIS for the last couple of weeks, with lots of interruptions, so I forget where I am sometimes. Anyway, here’s a piece of the latest map:
The streets are from the Census Bureau Tiger files. The red stuff, except for the small red dots, is from NCDOT and is the state’s railroad system as it goes through Greensboro. I’m not 100% sure of the railroads — there’s a North Carolina Railroad Corporation that owns pretty much everything and beats up property owners from time to time. The small red dots are NGS marks established by the railroad corporation. There have been some articles in American Surveyor in past years describing the work that established those points.
There’s this little 22 mile line from Granite Falls to Hickory. It’s the Caldwell County RR and it owns two engines. I don’t know who owns the track, though, but I had no idea that it existed before I downloaded the shapefile and looked at the attribute table. No survey marks or roads show on the map; I only did those for Guilford County.
I don’t know how useful such stuff is to surveyors. I can pretty well guarantee that there are some coordinate system anomalies in this idiot’s work, but I’m learning, both from the data and about the software.
Sorry for the interruption; carry on.
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