Coordinate Reference System Challenges In GeoScience Modelling
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Title 
Coordinate Reference System Challenges In GeoScience Modelling

Title of Series  
Author 

License 
CC Attribution  NonCommercial  ShareAlike 3.0 Unported:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and noncommercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this license. 
DOI  
Publisher 
FOSS4G, Open Source Geospatial Foundation (OSGeo)

Release Date 
2013

Language 
English

Production Place 
Nottingham

Content Metadata
Subject Area  
Abstract 
Geoscience modellers develop numerical models where constraints are placed on how the model domain and sampling relates to location in the modelled world and the real world. The shape of the model domain is a significant factor for numerical algorithms and computational solvers. This leads to a number of interesting definitions of coordinate reference systems. I will summarise some requirements the modelling community have for specifying and working with coordinate reference systems. Post processing and presentation of analyses are important factors; archiving for future use is a crucial consideration. I will present examples of horizontal and vertical coordinate system definitions in common use in the meteorology and oceanography domains and the challenges they may bring. The conclusion will be a discussion how specifications and tools for defining, interpreting and transforming coordinate reference systems, such as Well Known Text (WKT), European Petroleum Survey Group (EPSG) and PROJ.4 are able or unable to meet the requirements of a geosciences modeller.

00:00
Mathematics
Numerical analysis
Computer animation
Characteristic polynomial
Model theory
Model theory
System programming
Coordinate system
Thermodynamic system
Mathematical model
00:39
Pressure
Domain name
Algorithm
Algorithm
Euler angles
Model theory
Cellular automaton
Model theory
Projective plane
Physicalism
Protein domain
Coordinate system
Thermodynamic system
Mathematical model
Computer animation
Physicist
Dependent and independent variables
Circle
Energy level
Quicksort
Resultant
01:39
Pressure
Domain name
Spacetime
Model theory
Projective plane
Model theory
Bit
Protein domain
Coordinate system
Thermodynamic system
Mathematical model
Summation
Computer animation
Energy level
02:01
Point (geometry)
Pressure
Numbering scheme
Interpolation
Resampling (statistics)
INTEGRAL
Model theory
Model theory
Sound effect
Moisture
Coordinate system
Protein domain
Thermodynamic system
Area
Distance
Number
Mathematical model
Computer animation
Bilinear map
Energy level
Interpolation
Data type
Subtraction
Weight function
02:36
Area
Mobile Web
Resampling (statistics)
Model theory
Bit
Coordinate system
Limit (category theory)
Thermodynamic system
Area
Distance
Number
Mathematical model
Computer animation
Personal digital assistant
Bilinear map
Interpolation
Subtraction
Weight function
03:11
Code
Model theory
Motion capture
Coordinate system
Shift operator
Thermodynamic system
Number
Diagram
Pole (complex analysis)
Subtraction
Area
Thermodynamic system
Spacetime
Characteristic polynomial
Cellular automaton
Projective plane
Model theory
Mathematical model
Spheroid
Uniform boundedness principle
Computer reservations system
Uniform resource locator
Computer animation
Energy level
Row (database)
04:36
Area
Pulse (signal processing)
Thermodynamic system
Transformation (genetics)
Characteristic polynomial
Model theory
Model theory
Bit
Coordinate system
Protein domain
Mereology
Shift operator
Thermodynamic system
Number
Mathematical model
Spheroid
Programmer (hardware)
Computer reservations system
Computer animation
Personal digital assistant
Pole (complex analysis)
Form (programming)
05:37
Domain name
Suite (music)
Code
Model theory
Direction (geometry)
Multiplication sign
Cellular automaton
Coordinate system
Thermodynamic system
Area
Power (physics)
Number
Image resolution
Moore's law
Roundness (object)
Term (mathematics)
Computer configuration
Medizinische Informatik
Subtraction
Data type
Area
Algorithm
Thermodynamic system
Process (computing)
Information
Characteristic polynomial
Model theory
Protein domain
Local Group
Frame problem
Connected space
Vector potential
Mathematical model
Computer animation
Data storage device
Configuration space
5 (number)
Window
Domain name
Spacetime
Row (database)
08:41
Code
Transformation (genetics)
Parametrische Erregung
Multiplication sign
Cellular automaton
Coordinate system
Vector potential
Perspective (visual)
Thermodynamic system
Number
Representation (politics)
Pole (complex analysis)
Thermodynamic system
Key (cryptography)
Consistency
Model theory
Water vapor
Protein domain
Transformation (genetics)
Functional (mathematics)
Vector potential
Mathematical model
Software development kit
Computer animation
Network topology
System programming
Library (computing)
10:31
Computer virus
Pulse (signal processing)
Code
State of matter
Multiplication sign
Instance (computer science)
Mereology
Disk readandwrite head
Thermodynamic system
Image resolution
Optical disc drive
Mathematics
Mathematics
Bit rate
Control theory
Information security
Position operator
Covering space
Area
Thermodynamic system
Spacetime
Geometry
Structural load
Moment (mathematics)
Electronic mailing list
Sampling (statistics)
3 (number)
Bit
Open set
Mathematical model
Order (biology)
System programming
Right angle
Freeware
Boiling point
Data management
Point (geometry)
Web page
Observational study
Presentation of a group
Parametrische Erregung
Auto mechanic
Mass
Coordinate system
Local Group
Revision control
Latent heat
Term (mathematics)
Alphabet (computer science)
Utility software
Subtraction
Glass float
Pairwise comparison
Standard deviation
Polygon mesh
Information
Archaeological field survey
Projective plane
Model theory
Counting
Set (mathematics)
Line (geometry)
Protein domain
Local Group
Subject indexing
Computer reservations system
Word
Uniform resource locator
Computer animation
Personal digital assistant
Vertex (graph theory)
Game theory
Routing
Extension (kinesiology)
00:01
CHP
00:33
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00:41
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01:19
of a limited in America model that we pelted and the flying over on apply carry projection and you can see the model domain is a slight interesting shake and the gun my colleague from the cells individually model quite glycols model local not exactly the sort of small details on protecting the and and this is taken will
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give way around so in this
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example with looking at the world on carry projection and then joined model that they should have become a the little bit this is a huge model domain
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and halting the coastlines relative to the model space so the to are exactly the same
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data just a point of reference
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around so while costing very
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Poland to the people who we were with another thing during point the is resampling soaps and this is to do with interpolation and the very interested in the integration schemes will be used and is that what effect on the kind of work to do and in the number of different types of recycling need to be and a Justice of the moisture problems to the picture of a joint here is a global model and which is the name of the cash that is
02:38
limited area model next on top of said these men defined quite different and this particular use case what with looking at the
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global temperature and the limited area mobile temperature of model is a baseline and people want to do not only for the difference between the temperature particular around and summon only said across the globe to we have to do quite Castle something of 1 data on the other before we can do this simple numbers 1 1 the other 2 and only that's a little bit about the kind of
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challenges facing about talking about Cawdor consistent themselves to the 1st 1 with looking at here woefully rotated polls so taken no geographic told systems and and they moved in with all and the recent death of his own capture he Projections than they a very large numbers Quesnay of all and in South Pole which means they have a very very small area and set a new record you get and sinks and the place where the cell area tends to 0 and it really gets to cause them problems that have to do it in the global mobile of the local model of the move that to simulate and care about just look at the pub with the way with the grid is not quite the end with looking at the Italian advantage squad around us and what happens in central Asia does not because the again but moved up diagrams
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Treasury what we've done with taking geographical wouldn't system Astron just talking about it and then we got into new dramatist 2 1 in the location of all the good that no code system is what happens to be the Finite agrees that different model summary of white men and then some people so do the attention of the globe so they can shift the Meridian all to give them a nice model space where they want so
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what is the looking at of
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what would turn parameterized coordinate systems we got simple and numbers weakened small transformation and everything from the handled by the kind of programme that we
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have is widened a translated coordinate reference system and that's a widelyused 19 but in this case and the people who decided that the most pulled various forms part of the occupation and the various other oceanfront because the ocean model is so to do this they created to move pulse rather than just 1 1 accounted 1 over and as a person for a bit of a stir with his presence is quite interesting made to work with and and you can see the area where the 2 main simply defined a told and there is with a significant walking take this
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is what we have is the each set in mobile domain is defined in terms centre and it's called wheels happy area of the South try a gives some information about connectivity which sells connect to what impact in what direction but these doesn't use the full picture sir 1 of my questions and 1 of the things that we have posted size is this really a Cawdor system is helpful 1st try entry to the because the kind of work that we want to do with the these 1st and what we do rotated Polish Britain's will be doing the geographical would system or protected code system to can see how the requirements for together but do we have enough information is that the a worthwhile approach but in the
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ushered in the ocean model Group which Detroit agreed the whole suite the useful different resolutions different purposes and that being used by a lot of climate research and whether for costing ocean modeling communities but the full process about how you can build a demand is going to of the area and but to more examples of way to finding demand which gained credence to take him on to the people who developing new record algorithms 1 reason for this is that as computing power and storage potential increases that most 1 more the infected from most of the time they have a certain amount of time on the spot where to run model and will have to sell if you wanted a 6 0 4 comes a new start in the night and I want to give for cross the new it doesn't really help if your for cost returns after 6 o'clock in the evening because it has annual to Windows time frame for the written given used to computer with an automatic you will purchasing power they increase the resolution of the grid in time and space by precautions fits into the same Model time at the time that the placards rejection mustard placards and for Neurofen system has more more problems particular round balls to the wanted to move away from the book up with examples of the talk about a lot like the end the quadtree and the huge see as the main stretch across all of the globe is heavily receptionist and model being runs in the Met Office in some experimental configurations using a particular the research the system might respected the show a lot of care with the ocean model quit the most this tell self and the use some information about not sell muscle you get back from the model its as he put it data and anyone of although not the 1 we saw pullout that the number of your options as the become more popular that coming to the tool builders and saying we want to support so should you the and what all the
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and rotating Paul data in a early in the 19th with the coastlines walked around to you must cut from this is appalled at the ocean model seawater potential temperature and you can see kind of where the world is but because we don't currently treat as a tree code reference system we come same told to pull the coastline and an interesting features particular and Africa if you know your African Joe graffiti and that does not good representation so and talk
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of a pact transform Cawdor consistent from the key requirements that tool builders with being presented with which fought for extensively would find very nice toolkit we're and pleasant library which looks into approach for Connex back to the party and the public vaulting likely which is what we are making the graphics and that provides a really useful tools handling of a take over written a number of other requirements that we have and that all transfection in approach for which does everything we need rotated only comes to what could be translated toward reference systems we know where we have to do this we have to approach the problem and from 1 perspective to think that there is an interesting idea that that we should be approaching in this way and this is the kind of functionality that we want to but I'm not convinced have seen all the answer is yes that's 1 of the reasons I've come here to get some more opinions is this a good idea for is that the whole world pain that will come back is time say eye which we never gone down the road they are really really good the the required and we
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have as well as the functional persisting is about specification said people creating data and this to prospective future just Chepchumba equipped from the where the full cost as prospective them into for cost the Willie said for for tomorrow morning and will have the full cost 12 club and 6 in the evening to a maybe 5 days may get 7 days when the same thing 12 hours later the Muslim woman anybody wants is the latest information the climate recession very different position because that looking at doing runs at 200 150 is managing many many different scenario is very interested in the data are cutting problems and they've got the requirements to go back to data critic 10 15 is built use that now and comparative things that their during and as a huge project called the climate model into comparison study which has hundreds of care data from the last 10 days of climate research which is being used for the International Power on climate change were pulled which is just being published at the moment will be Olivio newspapers with various Indians Ms to me the best part is that the Tory quality and 64 the climate searches which standard some way that we can trust will still be there in 10 his time the listing which practically earlier and we found quite difficult because as the model is come up with new ideas it's been quite a hot to work out how you get you coordinate systems in particular when as a thought I'd awakens the rotated told and it's a comic definition 32 code is easy to define the beach model was built giving the provinces and the idea the kids Chico's giving exact answer doesn't really that for with looking well and text and particular the and by the time the alphabet and I had to make up about but there is a special working group India GCSE looking revamping and the code reference system wellmeant text and and interested about whether that provided the long term mechanism without really going to get what we need and I've start making having discussions with some of those people and about giving them the rotated poll used to say could you peaceable this because of the money will we pumped about in well in tax 1 of the only to mention this the widely used standard within the climate research community called the climate and 4 costing conventions for Nexia and just want to see the city and this week what the main specific favoured focused on climate research because of the kind of requirements of been talking about this Komogorova method specifying code reference systems and and somewhat recently looking at how they can find either use another methodology all my methodology on to another 1 that this is very heavy it not community but it's not clear how that gets out into the geographic communities of how it might be able to be used with the idea of where the some of those questions that I'd
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like to take a look at the time Frigo will be left with the float discussion of for my questions front on board were happy to take any of the questions you have only 1 talked about that this is 1 of the reasons citing on up to find out more information about the 1st but not have a bad habit standard definition Cawdor systems what what are best approach a 2nd was is useful to treat these translated code references the mass toward reference system should we be tried to push these kinds of destinations into tools that we would use and particular the approach for which has been a very effect and bring to a boil use cases and of those and you are in the you have to grid and the acute you the 1st lesson from the audience the question of how we are obvious 2nd place to the poverty line is the translated for which he is rumoured to be ready for the season and the 2nd is that no cost for for is that they said they and already those by so that goes to the tactic of the Germans as they were the 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the data said that if he got the considers that they ought to have a two year rate data that you're not used to doing it utility red areas and then at 2 body for of Kaunus different data about like give you sell in the UK into the centre of what you mean by centre the full Kaunas which may give you a slightly all change and some climate is about not sell talking about on my mind do during a controls much longer other way around and they were taking you take something the existing space like coastline and tell me how that looks index based we come we do have a mesh methodology doing the amendment not something we can during the rotated pulse because we got a mathematical counts for accurate Icopal date set of from behind and that would be so showed origin model is that it is functionality and local we have and we went back cover says no not now the city has to be changed or rather that were such suspected deal and that it was the beginning of the year you have to work with these like it 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putting tools which we written specifically to meet some of the cases are mention 1 called high this told with critical virus which is data management told that would give us the tools to do every something on top order system that they could work with and if the securities huge is just 1 of which than the odds public tools will do not just a few pages and uses a point was the pitches Irish area and they have told the right to provide information about this and that tools and cut their on your members to see the eve of the conference the you can experiment with 2 on the air and she wanted to go down the route free something the data than the people who doing it did where are changing the data at the point where I something so that you need to apply little bit of caution and take a few changing a resolution at the same time as their assuming that you going exactly the same number as in the UK so that the in this year of has long and while they are on which the city work of the police a lot of money the able to Asia is that by the end of the year and a group of 3 or which had