[tdwg-tag] time and space namespaces in Darwin Core

[Peter DeVries]

I looked through my iPhone programming book and the iPhone does output an
accuracy measure that can be in meters.

I don't now if all the applications expose this functionality but I did find
one for iPhone / iPad that does.

http://gps.motionx.com/iphone/overview/

<http://gps.motionx.com/iphone/overview/>- Pete

On Tue, Aug 24, 2010 at 3:44 PM, John Wieczorek <tuco at berkeley.edu> wrote:

> Catching up on this diverse thread...
>
> I suspect the sources for coordinates the BioBlitz will be phones and GPS
> receivers. I don't know of any phone application or consumer GPS receiver
> that provides coordinates in a reference system other than WGS84 by
> default. As Peter suggests, under these assumptions it would be fine to
> capture geo:lat, geo:long, and dwc:coordinateUncertaintyInMeters in the
> field. The expression of these data in Darwin Core would be
> dwc:decimalLatitude: dwc:decimalLongitude, dwc:geodeticDatum=WGS84
> or wc:geodeticDatum=epsg:4326, dwc:coordinateUncertaintyInMeters.
>
> It would be a nice educational exercise to assess the parameters of the
> devices before starting to use them to take data. What are the accuracies of
> those phones compared to the GPSs? And of the GPSs compared to reality and
> to their theoretical (and ephemeral) accuracy readings?
>
> For completeness one could add the other georeference metadata fields meant
> to provide completeness (strictly for educational purposes, of course), but
> I won't push it.
>
> On Sat, Aug 21, 2010 at 8:19 PM, Peter DeVries <pete.devries at gmail.com>wrote:
>
>> I was wondering if something like the following would be an acceptable
>> compromise for those who would like to expose their data using the geo
>> vocabulary.
>>
>> geo:lat
>> geo:long
>> dwc:coordinateUncertaintyInMeters
>>
>> The idea would be that RDF formatted in this way would be acceptable as
>> DarwinCore.
>>
>> This would not prevent others from using the traditional dwc vocabulary.
>>
>> The problem for many is that by using only the dwc version they use the
>> ability to take advantage of many existing tools and api's.
>>
>> - Pete
>>
>> On Fri, Aug 6, 2010 at 10:01 AM, joel sachs <jsachs at csee.umbc.edu> wrote:
>>
>>> All,
>>>
>>> When representing observation records in RDF, there are advantages to
>>> using Dublin Core and Geo (http://www.w3.org/2003/01/geo/wgs84_pos#)
>>> namespaces where possible. For example, if we use DC:date, and geo:lat,
>>> geo:long, instead of DwC:eventDate, DwC:lat, and DwC:long, then Linked Data
>>> browsers can automatically map the records, plot them on a timeline, etc.
>>>
>>> My question is: What are the disadvantages to doing this? (For example,
>>> is this going to break someone's DwC validator?)
>>>
>>> Thanks -
>>> Joel.
>>>
>>>
>>
>>
>> --
>> ----------------------------------------------------------------
>> Pete DeVries
>> Department of Entomology
>> University of Wisconsin - Madison
>> 445 Russell Laboratories
>> 1630 Linden Drive
>> Madison, WI 53706
>> GeoSpecies Knowledge Base
>> About the GeoSpecies Knowledge Base
>> ------------------------------------------------------------
>>
>> _______________________________________________
>> tdwg-tag mailing list
>> tdwg-tag at lists.tdwg.org
>> http://lists.tdwg.org/mailman/listinfo/tdwg-tag
>>
>>
>


-- 
----------------------------------------------------------------
Pete DeVries
Department of Entomology
University of Wisconsin - Madison
445 Russell Laboratories
1630 Linden Drive
Madison, WI 53706
TaxonConcept Knowledge Base <http://www.taxonconcept.org/> / GeoSpecies
Knowledge Base <http://lod.geospecies.org/>
About the GeoSpecies Knowledge Base <http://about.geospecies.org/>
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