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Re: Moon Landing or Safari? A Study of Systematic Errors and their Causes in Geographic Linked Data

From: Peter Baumann <p.baumann@jacobs-university.de>
Date: Tue, 24 May 2016 17:31:53 +0200
To: "Little, Chris" <chris.little@metoffice.gov.uk>, "janowicz@ucsb.edu" <janowicz@ucsb.edu>, Andrea Perego <andrea.perego@jrc.ec.europa.eu>, SDW WG Public List <public-sdw-wg@w3.org>
Message-ID: <574473E9.4030501@jacobs-university.de>

a very timely comment indeed! At the next OGC meeting Jacobs University and USGS
will suggest hosting Planetary CRSs on the OGC infrastructure. I had to learn
that there are already 2500 such CRSs!


On 05/24/2016 04:43 PM, Little, Chris wrote:
> Andrea, Krzysztof,
> A few years ago, I suggested, only slightly humorously, to Mark Reichardt, the CE of the Open Geospatial Consortium, that there should be Open Areo-Spatial,  Open Helio-Spatial, Open Jovio-Spatial or Open Seleno-Spatial Consortia. He responded in kind by demonstrating a Web Map Service for Mars, which seemed to work fine!
> Maybe someone (who?) should start establishing, alongside WGS84: WAS2016,  WHS2016, WJS2016, WSS2016, etc., if they haven't been done already, along with the areo/helio/jovio/seleno WKT strings. 
> Though heliocentric coordinate reference systems are more complicated, as the 'long/lat' origin of (0,0) is usually chosen to face earth permanently.
> Being on the fringes of space weather activity, and with institutes already forecasting weather on Mars, this is not as daft as it sounds.
> Chris
> PS I enjoyed the paper. Thank you to you, Kerry and your colleagues.
> -----Original Message-----
> From: Krzysztof Janowicz [mailto:janowicz@ucsb.edu] 
> Sent: Monday, May 23, 2016 3:46 PM
> To: Andrea Perego
> Cc: SDW WG Public List
> Subject: Re: Moon Landing or Safari? A Study of Systematic Errors and their Causes in Geographic Linked Data
> Hi Andrea,
> Thanks for the question. Almost all data were point features using the W3C Basic Geo (WGS84 lat/long) vocabulary. This is also the reason for the moon landing problem.
> Best,
> Krzysztof
> On 05/23/2016 01:44 AM, Andrea Perego wrote:
>> Many thanks for sharing your paper, Krzysztof.
>> Interesting to see on the map the "x-like structure", providing 
>> additional evidence to the axis order issue!
>> A question: maybe I've missed it, but I wonder if in your analysis you 
>> also collected information about the most used CRSs.
>> Cheers,
>> Andrea
>> On 21/05/2016 06:19, Krzysztof Janowicz wrote:
>>> Dear all,
>>> Attached is a pointer to our accepted GIScience 2016 paper about 
>>> systematic errors in Geographic Linked Data. I hope some of the 
>>> described problems and their (often funny) consequences will serve as 
>>> good examples for existing issues and the need for best practice 
>>> guides. Some of these issues are based on the lack of spatial 
>>> reference system identifiers and thus relate to a topic we discussed 
>>> on the list before.
>>> http://geog.ucsb.edu/~jano/giscience16_linkeddata_quality.pdf
>>> Best,
>>> Krzysztof
> --
> Krzysztof Janowicz
> Geography Department, University of California, Santa Barbara
> 4830 Ellison Hall, Santa Barbara, CA 93106-4060
> Email: jano@geog.ucsb.edu
> Webpage: http://geog.ucsb.edu/~jano/
> Semantic Web Journal: http://www.semantic-web-journal.net

Dr. Peter Baumann
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Received on Tuesday, 24 May 2016 15:32:28 UTC

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