[tdwg-content] Data capture software and Darwin Core
tuco at berkeley.edu
Mon Jul 22 13:18:48 CEST 2013
And yet, if you want to publish structured weather information along with
the occurrence information, you can do so with key:value pairs, or even a
JSON string, in the term called dynamicProperties, even within Simple
Darwin Core (see http://rs.tdwg.org/dwc/terms/index.htm#dynamicProperties
Just want to confirm my perception of Event, which, as Rich says, adds time
to the Location, but also adds information associated with the methods
(samplingProtocol, samplingEffort, fieldNotes). The distinction between
eventRemarks and fieldNotes may seem a little tenuous, but the intention is
to have fieldNotes be the as-close-to verbatim documentation actually taken
in the field - ideally a URL to a digital version of the document.
On Mon, Jul 22, 2013 at 5:26 AM, "Markus Döring (GBIF)"
<mdoering at gbif.org>wrote:
> Hi Justin,
> when mapping your data to simple darwin core you do not need to think
> about classes, its a flat, single record.
> Using basisOfRecord to distinguish between the two kind of records is
> exactly what this dwc term is for.
> When you say sightings could represent the weather though I am not sure if
> you really want to publish all your records as darwin core. There should be
> a species (observation) of some sort involved to make up a simple darwin
> core record.
> PS: Did you consider to use the newer darwin core archive format instead
> of XML?
> It would also allow you to bundle a dataset metadata file (e.g. EML) that
> can be used to describe the different methods used to generate the data
> Markus Döring
> Senior Developer
> GBIF Secretariat
> mdoering at gbif.org
> On 22.07.2013, at 07:10, Justin Steventon wrote:
> > Hi Rich,
> > Thank you, this certainly does clarify the intent.
> > Snapped was indeed referring to taking a GPS reading, date and time.
> Therefore it makes more sense as an Event rather than a Location. In the
> interim basisOfRecord (HumanObservation and MachineObservation) is a good
> way to distinguish these.
> > Aggregating the timer tracks into higher level structures is a longer
> term goal. Good luck at the next meeting. I’ll continue to track changes as
> this evolves.
> > Regards,
> > -Justin
> > From: Richard Pyle [mailto:deepreef at bishopmuseum.org]
> > Sent: Sunday, July 21, 2013 4:07 PM
> > To: 'Justin Steventon'; tdwg-content at lists.tdwg.org
> > Subject: RE: [tdwg-content] Data capture software and Darwin Core
> > Hi Justin,
> > These questions strike at the heart of some of what I think are the key
> unresolved aspects of DarwinCore – aspects that I hope will be the focus of
> some specific attention at the next TDWG meeting.
> > I will provide some answers from my own personal perspective.
> > In my mind, Location = Place (and all metadata associated with
> describing a place in three-dimensional space).
> > Event adds the fourth dimension of Time (i.e., Place + Time). Depending
> on who you talk to, Event may also include metadata related to “who” (which
> doesn’t necessarily need to be a human – it might involve telemetry devices
> as well). And, assuming there is some sort of sampling activity associated
> with the Event, there may be some metadata related to that sampling and its
> > I’m not entirely sure what you mean by “snapped” for Timer tracks. Does
> “snapped” refer to capturing images or some other sort of other data
> capturing protocol? Or does “snapped” simply mean that you log a timestamp
> and Lat/Long coordinates? If the latter, then I would treat each node on
> the Timer track (i.e., each “snap”) as representing an Event (Location +
> Time). If something other than the simple logging of Lat + Long + Time
> happens at each “snap”, then that opens up another set of issues which I’d
> be happy to comment on.
> > Likewise, presuming that each Sighting comes with its own Lat/Long
> (Location) data, as well as a time, then these, too, would represent
> Events. But anything documented at those Events (e.g., sightings of an
> individual organism) would represent Occurrence instances. Non-biological
> documentations (such as weather) would probably best be represented as
> properties of the Event. In DwC you’d probably express those in
> dwc:fieldNotes or dwc:eventRemarks.
> > A different (and equally legitimate) interpretation of how to represent
> Timer tracks in DwC would be to represent the entire Track as a single
> Event, capturing the “Location” component as a sequence of Lat/Long points
> (effectively describing a linear path as a single location), or as a simple
> polygon (bounding box or point+radius), and the “time” component as a range
> from the time of capture for the first “snap” to the time of the last
> > My own personal approach (which extends beyond what DwC:Event class is
> currently set up to accommodate) would be to do both for your timer tracks.
> That is, represent one Event as the entire track, with the Location
> described either with an ordered array of Lat/Long points or as a bounding
> box or point+radius that describes the smallest rectangle or circle that
> encompasses all of the points, and range of min-max timestamps to represent
> the Time component of the Event. Then I would capture each “snap” on the
> track as a distinct Event (in our data model, we support hierarchical
> events, so the individual points would be referenced as “child” events of
> the “parent” Event representing the entire track).
> > I’m not sure if that helps or only confuses things; but perhaps after
> the next TDWG meeting we might have more clarity and/or consensus on these
> > Aloha,
> > Rich
> > From: tdwg-content-bounces at lists.tdwg.org [mailto:
> tdwg-content-bounces at lists.tdwg.org] On Behalf Of Justin Steventon
> > Sent: Sunday, July 21, 2013 10:32 AM
> > To: tdwg-content at lists.tdwg.org
> > Subject: [tdwg-content] Data capture software and Darwin Core
> > Hi folks,
> > Just starting to get into Darwin Core. Thanks for any help and
> suggestions you can provide.
> > I’m the builder of a data capture application (using PDAs and smart
> phones) called CyberTracker (http://www.cybertracker.org). We want to
> create a feature to export to Simple Darwin Core as XML.
> > We have two kinds of data: timer tracks and sightings. Timer tracks are
> automatically snapped at regular intervals and only contain a timestamp and
> location. Sightings are manually captured data and vary quite a bit. For
> example, they could represent the weather or a direct sighting of an animal.
> > It seems clear that a sighting maps directly to an “Event”.
> > If we have a long list of timer track points, should these show up as
> many “Location” records?
> > Regards,
> > -Justin
> > _______________________________________________
> > tdwg-content mailing list
> > tdwg-content at lists.tdwg.org
> > http://lists.tdwg.org/mailman/listinfo/tdwg-content
> tdwg-content mailing list
> tdwg-content at lists.tdwg.org
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the tdwg-content