Cheers BrowserUK,

I'll definitely give that a go.

Out of interest is there an advantage to using the constant for END and REP rather than 0 and 1? I've not used that before.

Many thanks for your help

Rich

In reply to Re^2: Reducing memory footprint when doing a lookup of millions of coordinates by richardwfrancis
in thread Reducing memory footprint when doing a lookup of millions of coordinates by richardwfrancis

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