* Especially create the latitudes symmetrically from pole to pole.

* This way an even tighter space bound can be found for float writes.

* random is subject to arbitrary disturbances because libraries like to
  assume it can be used indiscriminately.

* And fallback to serial if not. Unfortunately this can only be queried at
  run-time it seems.

* This reduces later changes to data-structures.

* And use this to eliminate similar code in the serial test program.