Re: [OSM-talk] satellite Imagery missing

[Gregory]

On 21 September 2011 14:18, John Sturdy  wrote:
>
>
> And I'd be worried about "being brought to the attention of the
> authorities" for being seen pointing lasers at infrastructural things
> such as electricity pylons --- do people tend to complain about having
> their buildings etc visibly surveyed?  (I'm a newbie at all this, my
> only experience of potential problems has been that I could see that
> people were wondering what I was doing when I was walking around
> writing down house numbers.)  Or does a hi-vis jacket make it all
> alright ;-) ?
>
> __John


When I'm specifically out mapping, or cycling (so it's a safety thing too),
I often wear this OSM high-vis jacket.
http://shop.opencyclemap.org/products/openstreetmap-surveyors-jacket
Wearing it has mixed results but definitely a difference with people think
I'm official (or from Google). I get less people questioning what I'm doing,
more people asking me for directions or to fix/report something. In rougher
residential areas people are more defensive to the high-vis, they think I'm
from the council or something.

But it's nice to be asked what I'm doing with interest. You soon learn key
words that are good to mention, I like to make sure I get in "volunteer",
"hobby", and "more detailed & more uses than google". This is made easier by
kindly offering them a leaflet so they can go away and read about it or look
at the map I've made.
http://shop.opencyclemap.org/products/openstreetmap-promotional-leaflets (free
to UK addresses)

-- 
Gregory
o...@livingwithdragons.com
http://www.livingwithdragons.com
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Re: [OSM-talk] satellite Imagery missing

[kenneth gonsalves]

On Wed, 2011-09-21 at 15:35 +0200, Martin Koppenhoefer wrote:
> 2011/9/21 kenneth gonsalves :
> > it is dead easy - just point it at the target and click - it gives
> the
> > distance. At over 150 metres, a tripod helps, unless you have very
> > steady hands. It is useful for getting the exact dimensions of
> buildings
> > or golf greens. These can then be plotted in josm using the
> measurement
> > tool.
> 
> 
> AFAIK the JOSM measurement tool does not provide very exact
> measurements but is a bearable approximation. Not sure if this matters
> to you, but I guess you shouldn't rely too much on the displayed
> values. See for instance: 

my gps is accurate to 1-5 yards depending on the conditions - the range
finder is accurate to a yard. So I can live with the approximation of
JOSM.
-- 
regards
Kenneth Gonsalves


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Re: [OSM-talk] satellite Imagery missing

[kenneth gonsalves]

On Wed, 2011-09-21 at 14:18 +0100, John Sturdy wrote:
> > it is dead easy - just point it at the target and click - it gives
> the
> > distance.
> 
> So do you get the distance from two known points, and triangulate by
> distance, or do you use distance and bearing from one known point, or
> something else?

we get the approximate dimensions and location with gps - the range
finder gives the exact dimensions.
> 
> And I'd be worried about "being brought to the attention of the
> authorities" for being seen pointing lasers at infrastructural things
> such as electricity pylons --- do people tend to complain about having
> their buildings etc visibly surveyed?  (I'm a newbie at all this, my
> only experience of potential problems has been that I could see that
> people were wondering what I was doing when I was walking around
> writing down house numbers.)  Or does a hi-vis jacket make it all
> alright ;-) ? 

this is country specific. Most people tend to think a range finder is a
camera or binoculars.
-- 
regards
Kenneth Gonsalves


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Re: [OSM-talk] satellite Imagery missing

[Mike N]

On 9/21/2011 9:18 AM, John Sturdy wrote:

And I'd be worried about "being brought to the attention of the
authorities" for being seen pointing lasers at infrastructural things
such as electricity pylons --- do people tend to complain about having
their buildings etc visibly surveyed?


  I have been successful by appearing in tourist class - GPS out of 
sight, but with the antenna facing skyward, and recording done by 
camera.   Using a laser measurement tool will improve survey accuracy, 
but may increase the chances of raising questions.  And use judgement 
about detailed survey of military or secure government buildings.


  Having business cards helps to quickly answer questions.  I've only 
had to show a card once.

http://wiki.openstreetmap.org/wiki/Business_card
http://wiki.openstreetmap.org/w/images/2/2c/OSM-business-cards.pdf


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Re: [OSM-talk] satellite Imagery missing

[Martin Koppenhoefer]

2011/9/21 kenneth gonsalves :
> it is dead easy - just point it at the target and click - it gives the
> distance. At over 150 metres, a tripod helps, unless you have very
> steady hands. It is useful for getting the exact dimensions of buildings
> or golf greens. These can then be plotted in josm using the measurement
> tool.


AFAIK the JOSM measurement tool does not provide very exact
measurements but is a bearable approximation. Not sure if this matters
to you, but I guess you shouldn't rely too much on the displayed
values. See for instance:
http://josm.openstreetmap.de/ticket/4849

You should also be careful not to select nodes as well:
http://josm.openstreetmap.de/ticket/6872


cheers,
Martin

PS: Maybe the first issue has to do with projections and the way these
calculations are done (flat vs. elliptical), and it may well be that
the differences are not significant, dependant on where you measure
and how long the distances are.

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Re: [OSM-talk] satellite Imagery missing

[John Sturdy]

On Wed, Sep 21, 2011 at 6:33 AM, kenneth gonsalves
 wrote:
> On Tue, 2011-09-20 at 10:49 +0200, Erik Johansson wrote:
>> > 90% of my mapping is in such areas - gps, josm and repeated visits
>> to
>> > the area are needed. Camera and laser range finder are a plus.
>>
>> Do you actually use an laser range finder, isn't that a bit hard to
>> use? I would really like to hear how you use it, if not an extensive
>> exposé then a shor one. :-)
>
> it is dead easy - just point it at the target and click - it gives the
> distance.

So do you get the distance from two known points, and triangulate by
distance, or do you use distance and bearing from one known point, or
something else?

And I'd be worried about "being brought to the attention of the
authorities" for being seen pointing lasers at infrastructural things
such as electricity pylons --- do people tend to complain about having
their buildings etc visibly surveyed?  (I'm a newbie at all this, my
only experience of potential problems has been that I could see that
people were wondering what I was doing when I was walking around
writing down house numbers.)  Or does a hi-vis jacket make it all
alright ;-) ?

__John

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Re: [OSM-talk] satellite Imagery missing

[kenneth gonsalves]

On Wed, 2011-09-21 at 02:15 -0700, Richard Fairhurst wrote:
> Kenneth Gonsalves wrote:
> > 90% of my mapping is in such areas - gps, josm and repeated visits 
> > to the area are needed. Camera and laser range finder are a plus.
> 
> JOSM is absolutely not "needed" for GPS surveying - you can use it if
> you
> like, but I do pretty much all my mapping in Potlatch with GPS traces
> rather
> than Bing. 

no disclosure ;-)
-- 
regards
Kenneth Gonsalves


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Re: [OSM-talk] satellite Imagery missing

[Richard Fairhurst]

Kenneth Gonsalves wrote:
> 90% of my mapping is in such areas - gps, josm and repeated visits 
> to the area are needed. Camera and laser range finder are a plus.

JOSM is absolutely not "needed" for GPS surveying - you can use it if you
like, but I do pretty much all my mapping in Potlatch with GPS traces rather
than Bing.

cheers
Richard



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Re: [OSM-talk] satellite Imagery missing

[kenneth gonsalves]

On Tue, 2011-09-20 at 10:49 +0200, Erik Johansson wrote:
> > 90% of my mapping is in such areas - gps, josm and repeated visits
> to
> > the area are needed. Camera and laser range finder are a plus.
> 
> Do you actually use an laser range finder, isn't that a bit hard to
> use? I would really like to hear how you use it, if not an extensive
> exposé then a shor one. :-) 

it is dead easy - just point it at the target and click - it gives the
distance. At over 150 metres, a tripod helps, unless you have very
steady hands. It is useful for getting the exact dimensions of buildings
or golf greens. These can then be plotted in josm using the measurement
tool.
-- 
regards
Kenneth Gonsalves


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Re: [OSM-talk] satellite Imagery missing

[kenneth gonsalves]

On Thu, 2011-09-15 at 05:05 -0700, Douglas Musaazi wrote:
> We were able to use the walking papers and the g.p.s unit that enabled
> us to have better accuracy, using potlatch without the satellite
> imagery was like working while blind folded and we managed to make the
> edits. We never used Merkaator or JOSM as it was a one day event, and
> it was an introductory to the 20 participants, so the quickest tools
> had to be used. I would like to know if there is any other means, or
> when the satellite image will be available to OSM for such areas.

90% of my mapping is in such areas - gps, josm and repeated visits to
the area are needed. Camera and laser range finder are a plus.
-- 
regards
Kenneth Gonsalves


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Re: [OSM-talk] satellite Imagery missing

[Gregory]

On 15 September 2011 13:37, Tom Hughes  wrote:

> On 15/09/11 13:05, Douglas Musaazi wrote:
>
>  On Saturday 10th September 2011, we held a mapping day event at Uganda
>> Christian University Mukono in Uganda, where we spread the idea of
>> mapping and updating the Open Street World map as part of the mapping
>> Uganda Initiative at pamoya 
>> (http://www.pamoya.com/node/**13275),
>> however,
>> the satellite imagery for the area
>> (http://www.openstreetmap.org/**?lat=0.35501&lon=32.74088&**
>> zoom=17&layers=M)
>> was
>> not available.
>>
>> We were able to use the walking papers and the g.p.s unit that enabled
>> us to have better accuracy, using potlatch without the satellite imagery
>> was like working while blind folded and we managed to make the edits. We
>> never used Merkaator or JOSM as it was a one day event, and it was an
>> introductory to the 20 participants, so the quickest tools had to be
>> used. I would like to know if there is any other means, or when the
>> satellite image will be available to OSM for such areas.
>>
>
> There is imagery (from Bing) there, but only up to z13. We have the imagery
> we're given (or rather allowed to use) I'm afraid and we don't have a way to
> magically conjure up high res imagery where Bing don't have it.
>
>
We can ask for it.
Steve made some mention at the conference, and  so I've found this page
which you should edit to add Uganda. I suggest including a link to the map
you've done so far, it is a very good work/effort without aerial imagery.
http://wiki.openstreetmap.org/wiki/Bing/Priorities

You could also make your own aerial imagery, although this seems to be quite
difficult and may not provide enough of what you want.
http://wiki.openstreetmap.org/wiki/Vertical_Aerial_Photographs

-- 
Gregory
o...@livingwithdragons.com
http://www.livingwithdragons.com
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Re: [OSM-talk] satellite Imagery missing

[Martin Koppenhoefer]

2011/9/15 Douglas Musaazi :
> On Saturday 10th September 2011, we held a mapping day event at Uganda
> Christian University Mukono in Uganda, where we spread the idea of mapping
> and updating the Open Street World map as part of the mapping Uganda
> Initiative at pamoya (http://www.pamoya.com/node/13275), however, the
> satellite imagery for the area
> (http://www.openstreetmap.org/?lat=0.35501&lon=32.74088&zoom=17&layers=M)
> was not available.


Hi Douglas,

this looks great. Happy to see OSM growing in Uganda.

cheers,
Martin


PS:
As a side note you might want to reconsider the classification of the
street in the middle named "path", which is currently "primary" (which
is a main connection road usually to be found between cities and
larger towns)

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Re: [OSM-talk] satellite Imagery missing

[Tom Hughes]

On 15/09/11 13:05, Douglas Musaazi wrote:


On Saturday 10th September 2011, we held a mapping day event at Uganda
Christian University Mukono in Uganda, where we spread the idea of
mapping and updating the Open Street World map as part of the mapping
Uganda Initiative at pamoya (http://www.pamoya.com/node/13275), however,
the satellite imagery for the area
(http://www.openstreetmap.org/?lat=0.35501&lon=32.74088&zoom=17&layers=M) was
not available.

We were able to use the walking papers and the g.p.s unit that enabled
us to have better accuracy, using potlatch without the satellite imagery
was like working while blind folded and we managed to make the edits. We
never used Merkaator or JOSM as it was a one day event, and it was an
introductory to the 20 participants, so the quickest tools had to be
used. I would like to know if there is any other means, or when the
satellite image will be available to OSM for such areas.


There is imagery (from Bing) there, but only up to z13. We have the 
imagery we're given (or rather allowed to use) I'm afraid and we don't 
have a way to magically conjure up high res imagery where Bing don't 
have it.


Tom

--
Tom Hughes (t...@compton.nu)
http://compton.nu/

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[OSM-talk] satellite Imagery missing

[Douglas Musaazi]

Hi..?

On Saturday 10th September 2011, we held a mapping day event at Uganda 
Christian University Mukono in Uganda, where we spread the idea of mapping and 
updating the Open Street World map as part of the mapping Uganda Initiative at 
pamoya (http://www.pamoya.com/node/13275), however, the satellite imagery for 
the area 
(http://www.openstreetmap.org/?lat=0.35501&lon=32.74088&zoom=17&layers=M) was 
not available.

We were able to use the walking papers and the g.p.s unit that enabled us to 
have better accuracy, using potlatch without the satellite imagery was like 
working while blind folded and we managed to make the edits. We never used 
Merkaator or JOSM as it was a one day event, and it was an introductory to the 
20 participants, so the quickest tools had to be used. I would like to know if 
there is any other means, or when the satellite image will be available to OSM 
for such areas.



Yours Truly

Douglas Ssebaggala Musaazi
Mobile:  
 +256-772-422524

http://www.mountbatten.net
http://www.pamoya.com/node/13275
http://www.mappingday.com
http://www.openstreetmap.org/?lat=0.292113&lon=32.617623&zoom=18&layers=M
http://www.linux.or.ug

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