To avoid the SD card corruption issues you should always shut down the OS properly, you can automate this by using a power controller hardware solution and a script that is triggered through a GPIO port signal, for example (in addition to the Pi Supply mentioned above) :


http://mausberry-circuits.myshopify.com/
http://msl-digital-solutions.myshopify.com/products/remotepi-board


The RemotePi Board in the last link has the added functionality of using IR remotes to power on/off the RaspberryPi.

How do I turn off my Raspberry Pi?
My projection is this: NAD 1983 StatePlane North Carolina FIPS 3200 Feet, which has a proj4 string that looks like this:

+proj=lcc +lat_1=34.33333333333334 +lat_2=36.16666666666666 +lat_0=33.75 +lon_0=-79 +x_0=609601.2199999999 +y_0=0 +ellps=GRS80 +datum=NAD83 +to_meter=0.3048006096012192 +no_defs


Its SRID is 102719. I've tried to create a db column in PostGIS with an srid option for this projection, but its rejecting the srid, calling it invalid.

I've found a similar projection with a valid srid code, NAD83 / North Carolina (ftUS) (srid=2264), which has a proj4 string nearly identical to the above:

+proj=lcc +lat_1=36.16666666666666 +lat_2=34.33333333333334 +lat_0=33.75 +lon_0=-79 +x_0=609601.2192024384 +y_0=0 +ellps=GRS80 +datum=NAD83 +to_meter=0.3048006096012192 +no_defs 


As you can see, the only difference between these two is that the lat_1 and lat_2 degrees are swapped. They even use the same three degrees, only the first two are differently ordered.

Can I use this second projection?

UPDATE: The answer seems to be leaning towards 'yes', I just ran projection-to-projection transformations from a single projection to the NC projection using the "legitimate" and "illegitimate" proj4's and got similar results down to the 7th decimal place
