[HOT] Fwd: Accuracy ( international women's day)

[Gertrude Hope]

Hi Steve,
Thank you.


On Wed, Mar 2, 2016 at 12:31 PM, Steve Bower <steve at worldvista.net> wrote:

> Gertrude,
> Be aware that although "recreational" GPS devices have improved in
> accuracy, my tests of one tablet (bought a year ago) had occassional
> location errors of 100+ meters, which lasted for up to 1+ minutes. I've
> seen similar test results reported elsewhere. You may want to consider the
> accuracy of your GPS device, and test recreational devices (most phones &
> tablets) by comparing readings with known locations.
>
> Good luck,
>
> ~~Steve
>
>
>
> On Mon, Feb 29, 2016 at 11:12 PM, Gertrude Hope <trudyhope7 at gmail.com>
> wrote:
>
>> Hi Geof,
>> What was their worry is that, if what we are using is not so accurate,
>> They will end up tracing a person's toilet or water tap in a different
>> compound.
>>
>> Gertrude
>> On Mar 1, 2016 1:05 AM, "Geoffrey Kateregga" <kateregga1 at gmail.com>
>> wrote:
>>
>>> Hi Trudy,
>>>
>>> Thanks for the work done so far in building an OSM community in Zambia,
>>> I can also share with you my experience in using OSMTracker, GPS units
>>> and field papers from our mapping under "Ramani Huria" in Dar es Salaam.
>>>
>>> The accuracy of OSMTracker improves when you have an internet connection
>>> and it can go as high as 3m or less, it is necessary to check the level of
>>> accuracy when picking a way point. What usually helps is when you import
>>> the track and waypoints into JOSM, then you can place the nodes more
>>> accurately by looking at the imagery.
>>>
>>> Using Fieldpapers with Bing imagery may not be very helpful in informal
>>> settlements where the houses are very close to each other, locating where
>>> you are on the fieldpaper when in the field maybe challenging. If you can
>>> afford it, acquiring several Garmin etrex 20 or 30 GPS units will prove
>>> useful.
>>>
>>> Regards,
>>>
>>> Geoffrey.
>>>
>>> On Tue, Mar 1, 2016 at 1:35 AM, Gertrude Hope <trudyhope7 at gmail.com>
>>> wrote:
>>>
>>>> Thank you Chris
>>>>
>>>> Gertrude
>>>> On Mar 1, 2016 12:33 AM, "Chris Fleming" <me at chrisfleming.org> wrote:
>>>>
>>>>> Blake has mostly covered it. But worth saying explicitly, if we assume
>>>>> that the best you're going to get on a GPS is 5m, but your concern is that
>>>>> you're mapping things that are much closer together - then the solution is
>>>>> to combine the GPS and paper based approach. The important thing from a
>>>>> navigation point of view is getting the relevant features correctly placed
>>>>> reactive to each other.
>>>>>
>>>>> What you will find is that the combination of airial/gps and survey
>>>>> data will bring the accuracy down. But ultimately, relative postition is
>>>>> the key.
>>>>>
>>>>> Cheers
>>>>> Chris
>>>>>
>>>>> On Mon, 29 Feb 2016 at 17:43 Gertrude Hope <trudyhope7 at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hi Blake,
>>>>>> Thank you so much for The information.
>>>>>> On Feb 29, 2016 7:31 PM, "Blake Girardot" <bgirardot at gmail.com>
>>>>>> wrote:
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