Automated survey clino/compass (fluxgate?) with logging to memory card. No built in laser distance finder as of yet, but its coming. Talking to Pybus (OUCC) at BPF, most laser rangefinders have random ferrous metals in the optics / containers, which throws compass off (i.e. can't house together, yet). Ł250 per unit cost, rather crusty user interface - but certainly the way things are going.
Regarding the necessary length of a tape: From G.W. 2007 survex data, 795 tape lengths were easily extracted (by grep + regex).
- 56/795 \~ 7% > 15.00m in length
- 2/795 \~ 0% > 30.00m in length
http://www.toolshopdirect.co.uk Seems cheapest for the Lufkin tape measures:
- 15m for Ł23 inc. VAT
- 30m for Ł35.54
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