[talk-ph] Ultimate mapping challenge: marking the Station Balanacan in OSM
eppgarcia at gmail.com
Fri Aug 12 10:07:15 BST 2011
Manila Water Co actually mark their water meters by GPS. And they do use
those sub-centimeter accurate GPS equipment. I saw them mark our water
meter a few months ago. They say they also do this to mark where their
supply pipes are.
On Fri, Aug 12, 2011 at 4:54 PM, Jim Morgan <jim at datalude.com> wrote:
> maning sambale wrote, On Friday, 12 August, 2011 04:12 PM:
> > My handheld GPS is off by 6.92 meters from the published PRS92
> That reminded me, I was walking down the street the other day in Makati,
> and I came across a manhole cover. It had a detailed GPS co-ordinate
> engraved on it.
> The co-ordinates were accurate down to 1/100th of a second, which seems
> quite precise (one second is around 28 metres at this latitude). I was
> wondering if this is common to all areas / cities, and if so, can we use it
> for something - aligning or verifying roads.
> Also ... maybe roadworks departments have records of these that they'd be
> prepared to release?
> datalude: information security
> e: jim at datalude.com
> Philippines: +63 2 403 1311 / mob: +63 917 849 3939
> Hong Kong: +852 6840 6693
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