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    Re: GPS selective availability
    From: Ronald van Riet
    Date: 2018 Sep 23, 01:33 -0700

    Benchmarks such as these are present in many countries, including the USA and The Netherlands. In both cases, these are small markers (in The Netherlands like large nail heads or the top of a church tower) which should give a better accuracy than the 6-inch or so (?) stone marker used in your example.

    Many of the US benchmarks can be viewed on http://www.waymarking.com/wm/search.aspx?f=1&kw=benchmarks&st=2 whereas many of the Dutch benchmarks can be viewed on http://www.waymarking.com/cat/details.aspx?f=1&guid=d905f699-65da-41c8-84d0-354e1ab33833&st=2. A good example of the nail-type of Dutch benchmark is http://www.waymarking.com/waymarks/WMWWN0_RD_Meetpunt_279327_Vaassen.

    Ronald

       
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