Chris Andrew wrote:
Hi, all.
Some time ago, I realised from this list that it is possible to get an
overlay on OSM of mapping errors, such as roads that don't join, bad
tags etc. I can never remember how to turn this on. Would it be
possible for Potlatch to have an on/off button for this
There have been a number of attempts to estimate the level of UK coverage,
of varying levels of sophistication, but I've not seen any that compare the
length of roads mapped against actual road lengths.
The Department for Transport publishes statistics on actual road lengths by
local
routing for projects such as Navit and
OpenSatNav.
What does anyone think?
Chris (chris_debian)
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and
OpenSatNav.
What does anyone think?
Chris (chris_debian)
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Of the authorities I have managed to measure, the following all show more
road mapped than the DfT believes exists:
There could be a number of reasons for this;
1.Our boundaries are plotted from old parish boundaries on NPE
typically. I had to move the Trafford/Manchester boundary in a
Peter Reed wrote:
Of the authorities I have managed to measure,
the following
all show more road mapped than the DfT believes exists:
Having mapped every road in Hull (Kingston-upon-Hull since today is a
Sunday), some are fairly new and may not appear on the DfT figures.
On 19 Jul 2009, at 11:54, Chris Hill wrote:
Peter Reed wrote:
Of the authorities I have managed to measure, the following all
show more road mapped than the DfT believes exists:
Having mapped every road in Hull (Kingston-upon-Hull since today is
a Sunday), some are fairly new and may
Hi,
Peter Miller wrote:
There is a relation for 'London Boroughs'. I wondered if we should produced
one for 'Regions of England', and 'ceremonial counties of England' and
add the appropriate relations to them.
Generally, relations that just serve the purpose of collecting things
are
On the problems with Hampshire - my only related experience is that I had
problems with POSTGIS unable to process a number of admin boundaries,
because they are plotted with loops in the boundary. I.e. the boundary
crosses over itself.
This mostly happened where the coast had been added to the
Frederik Ramm wrote:
Interestingly I joined this list a while ago because I had got my
hands on some admin boundary data for England and wanted to know if it
was any good (the answer was no). I then forgot to unsubscribe. I'm
still planning to extend the Geofabrik excerpts to cover all
FWIW I've now updated http://www.reedhome.org.uk/Documents/LGboundaries.csv
to include a list of local authorities in Scotland, Wales and N. Ireland.
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The way I have handled dual carriageways (and motorways) is to assume that
both carriageways are plotted separately on OSM. So the figure that
results
should be twice the length estimated by DfT. However, for primary roads,
DfT
themselves show the total length of primary road, and the
2009/7/19 Frederik Ramm frede...@remote.org:
Hi,
Peter Miller wrote:
There is a relation for 'London Boroughs'. I wondered if we should produced
one for 'Regions of England', and 'ceremonial counties of England' and
add the appropriate relations to them.
Generally, relations that just
Oh just a thought, does the calculations include toll roads? Do the
DfT monitor these in their figures? (M6 toll, Severn Bridge etc.)
Yes they do. It's in the notes on the DfT website that private toll roads
which form part of major routes are included, but private minor roads are
not.
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