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

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.


PS I enjoyed the paper. Thank you to you, Kerry and your colleagues.

-----Original Message-----
From: Krzysztof Janowicz [] 
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.


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.

>> Best,
>> Krzysztof

Krzysztof Janowicz

Geography Department, University of California, Santa Barbara
4830 Ellison Hall, Santa Barbara, CA 93106-4060


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Received on Tuesday, 24 May 2016 14:44:26 UTC