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Spatio-temporal data visualization in GRASS GIS: desktop and web solutions

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my name is lots of the trash and I will present to you several tools for a spatial-temporal data vizualization in Graz years so this is this is a work which I want to go there if under that Ashland Parliament actually chart actually here and of course you know that the as researchers and scientists Java had been the at all the time series not now available at the time series of light our data and on some other Our time series and the can like analyze them and visualize them and of course for written association we need some tools and from the stools view of always regarded built like help us to understand the data out to simple like look at the data and also to present the data to the public to tell the story of our research and results Our research group for the yeah for our GIS what we are mostly using grass GIS which is like that well established to G as it felt of tools so we decided although the grass yes is the right what forum for us to develop 2 vizualization tools we need and but we also think or believe that the the integration into the of bigger open source of open source project of bill and shortage our tools still prevail for some time or some longer time hopefully and that although they will be used by broader community and hopefully they will also contribute back of gold or ideas and the really consider this as a very important because we have seen a large number of other vizualization tools for spatial-temporal made up but the stores they're like never broadly used for example or a only limited community of people it is using it so we hope that integration into a bigger project we'll avoid at and although we have seen a lot of tools which are which are so for spatial and spatial-temporal vizualization of a vector rate out of or even of some particle or type of vector data and their focus just on that I'm not we are mostly working with rosters
and these tools are like not of sufficient for us and also like switching to other tools and so on is not convenient as he would like to to on the other hand
grass GIS by itself it supports vector data us 3 the bubbles also years the rate of and lately also time series of data the at the time series of data are supported things that of grass GS temporal framework also known as the grass and this framework it's more you can have data time series of factory the US rate rate up and it all of course enables you to manage data this data and analyze these data so the the thing that this is right right matched it he can like editor also to vizualization data and those of course use general framework to support the development of the tool because sometimes the temporal at our not so easy to handle for example because they are so big with so we developed an animation tool are past yes animation to of so supposed to be general purpose is opposition to and the whole RBI using its flora like most exploratory vizualization to learn more about the data and also to create some nice animations to communicate the results of our research the so the general public and I will you I will show several animations they are mostly on animations of faster time series because this is what the law of wave and this is our animation of solar ideation changing so
1 day based on the y our data 1st it aligned our data the the and yeah is this year
similar vein rather than actually by
into sky for our Brock
djeca public and he was interested
in of this this this all done in graphs and he was interested it does or
hollow along the sun is shining the
children playgrounds but but he
also of it not only the
calculation but also included this
animation done in a however
last year's animation to so like
convey our what he's actually
talking about the the general public yeah of this is said the animation all follow-up thruster time series it is it is such a surge June in the North Carolina Outer banks so it is the same you which is moving every year bit actually quite fast the
and data based on several measurements of the flight of the and again it is done in animation tool in the US and the our height again have several animations in this case you have 1 CD animation and onto the
animation and he actually did the database animation during the workshop workshop on tuesday rituals focused on the spatial-temporal data-handling get dieselization in graphs so Mrs. this is said a special application very actually project the animation on below under the CDN model like physical model and I I don't talk much about it but you can learn more about it at announced that the actual presentation on a friday which will be about yes based modeling tangible interaction so don't is that and this is another
example of animation which is possible to created animation tool so the
data are very creative Mark was
metal presented this data set which
is the European on land
surface temperature data sets but based
on what is that the letter presented the
this like in the last session
friends the future of animation dual you can see here is that it cannot during
the animation it can also assumed to
some particle are so again like by 1 In each 1 Munchie for video you
can explored a whole dataset and
also assume to some particle or prices so that it is clear like what's
the resolution of the data or how
article or part of doing what are elements
like and finally you our see sedate and of course you can I
see yesterday top you don't show it all at once so 4
CDs later you always use some adults but in this case we are
using slices the start planes at the back end of and at the bottom and iso-surfaces surfaces said
surface in CDs through it constant volume and so we are looking
at a soil moisture measure during sound period of time so of
the are changes and of so go isosurfaces out of
things in the middle and they are you there are showing it's sort amount of
so moisture and in this case you got get some idea about had to
preach places it is chain it this Summers's higher and lower and it
is quite interesting for the people working there so data because from what we have
seen they usually use just to the blocks of lot of of their data so this sorry yes
quite interesting for so all these features are currently available in grass GS 7 which is the upcoming upcoming grass GS series and animation to actually can do a lot more because the time series data begin have unequal time intervals you can also show 2 times used to get the so this all can be handled by by the animation tool and of course you have the support of 2 gas temporal framework so you can so minute your data gotten and brought it up pretty well there and animation tool of the of course on the of publishing Baku so you can save a load unimation as chief or video which is supplied and it it is easy to use again Our publish it easily online and you can although show offline if people but it is not much in directed the end you might like the concept of preparing but animation in software you know we have to date of you know and the publishing them on line In some very simple they so what you're asking is if we can do and do something as simple as not which would be more interactive because sometimes the chief is not enough you want like some suming can spending and these things but on the other hand we want to keep dough think simple so that our students can use it we don't have to install any server side social things we don't have do you like use an assert party services and so on or do you want to give the things simple so what we address the problem by by several other tools so we use but 1 tool to explore the data from grounds yeah tool some given format and then the devil uh that application which is based just on HTML CSS and your script so it doesn't require anything except of observer and deterrence also offline we don't the having to any of that that set of server-side application but this all this obligation tendon showed a data previously exported from graphs the so no obligation
is what you would expect from mapping application it is based on the flat and it can do all of things like so main kinds we have different base layers as and the of what is important for us that it's can handle the animations so it under mates and also I can to layer switching by hand and to how this is visible so but that should this the the so this is of the same obligation but different data the data
are assimilation of bytes fire of rejection happened somewhere in the Genia and began you just look at domination as it would to be if so it is also easy to use of course but if you like want to explore more you can change basic going changed over of steps or 2 times by yourself and when and that once he had made a data hello from grasp explore date we also also all actually the date that can a feet any application the you warned and it just depends how the
application of the present a data so we actually created another application which
is which is using the same of
Explorer from grass about the application is social window that the clearest as like and in that mapping application is using without us spatial temporal but just the spatial body and it of some other interesting features right the of explored from grass also
histogram of demand and some statistics of demand so and you can explored is the
top again like published the data and the
person consuming this call then does not have
to of Computer anything is everything is precomputed and you are just using this
of the present is just and again in this
light on the concept of export and and a simple publication adjustment acquire
anything not mutually either we are using also so a lot of data which are of vector fields so vector field is set he said this can describe some dynamic process so it might so this is the time extent only but a director field is set usually represented by 2 roster 1 is the direction and 1 is the magnitude so it can be for example slope and aspect and of the dynamic process which would be driven by this vector field would be water flow well in a simplified way and so when we have a static our presentation of it like as vizualization only it is usually by the arrows you can see but when we have seen Tokyo in speech so based on DCG s maybe you have seen it to we felt that this is actually quite nice dieselization of vector field because it gives you the feeling of the vector field is doing so if you have seen the top kill means be mapped this is our application which can be very can feed any data power so again we have some export tool of 4 grass digital be explored but to date time form of this application requires and he actually I at the popular in speech now so it does not support any other data and want which it was intended to use a lot of replication you can feed any data you want there so so this is what the follow it is I get this basic example based on the slope and aspect about this more interesting is that you can on use it also Florida like 4 and a vector field so in this case we use it for a vector field which is based on the cost surface of it and the cost surface in a set is is describing do a shortest path to go top at a certain point it at a point that map so In this case it would be like people getting to some certain of places like the soccer field or something and so you can of course have only do cost surface but 4 of some people like us surface or does it mean so this demo to the have moving particles on top of the cost surface which are like which are moving and they are we can imagine that there are of people moving or people in cars moving behind it so distant help people to understand what the cost surface actually means so if you place the particle some very on the cost surface it will fall at a certain point and it will fall in different speeds and so on so I have shown there of last year's mission to which is actually integrated into grass yes it is available from yeah 7 and can be
can be used and it is meant to handle really complex data and it is indicated also a custom Perl framework which
enables it to handle the complex data and 0 seperately the are we have also in our it hub repository via have are the obligations which are which can be used for animation or just present and a static data all the no special on an obligation for presenting the vector field we and of course we have there also the of exports tools now which of fulfills the requirement that it is like a simple workflow and you don't need any server-side application for it and this is of so this is talking economic threat yeah associated article there it so if you don't like more information about the tools or something hopefully in the future you will be able to find the article somewhere and there is also page so you can have this slide from our website if you want of some links and that's all thank you for your attention and I will be and questions
criticism yes and and maybe emission but indeed uh wet feud created with the Russia animations you actually still have a link with your original data and a since each could click on the roster and she what the actual value at that place was at that time no no that's as basically the price for the simplicity because those layers which out there are only PNG images which are our which has the geographical extent associated so they can be placed on the map but they are no longer the managers I have some ideas how to enable this but again it would be on only really del the that on like export and ensure principle and its so if you update also the data you have to again export and publish thank thank you for Turkey answer but uh 1 of the suggestions might be i'd you probably aware of that the share it was presented somewhere else uh he's UTF grid sticking which we use client side you know you are aware of the Apollo I was not at is OK you you should check account because that might be a possible solution for your for from and OK thank you and few
Resultante
Assoziativgesetz
Sichtenkonzept
Open Source
Applet
Gruppenkeim
Zahlenbereich
Vektorraum
Bitrate
Fokalpunkt
Computeranimation
Integral
Webforum
Zeitreihenanalyse
Datentyp
Inverser Limes
Projektive Ebene
GRASS <Programm>
Partikelsystem
Visualisierung
Speicher <Informatik>
Hilfesystem
Bitmap-Graphik
Resultante
Wellenlehre
Flächentheorie
Temporale Logik
Vektorraum
Bitrate
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Framework <Informatik>
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Texteditor
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Framework <Informatik>
Zeitreihenanalyse
Typentheorie
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Faktor <Algebra>
Softwareentwickler
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Flächentheorie
Ungerichteter Graph
Rechnen
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Flächentheorie
Computeranimation
Bitmap-Graphik
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Datenhaltung
Physikalismus
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Kartesische Koordinaten
Ungerichteter Graph
Kombinatorische Gruppentheorie
Einflussgröße
Computeranimation
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Frequenz
Einflussgröße
Computeranimation
Bitmap-Graphik
Verkettung <Informatik>
Quick-Sort
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Online-Publizieren
t-Test
PASS <Programm>
Kartesische Koordinaten
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Ausnahmebehandlung
p-Block
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GRASS <Programm>
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Bildgebendes Verfahren

Metadaten

Formale Metadaten

Titel Spatio-temporal data visualization in GRASS GIS: desktop and web solutions
Serientitel FOSS4G 2014 Portland
Autor Petras, Vaclav
Petrasova, Anna
Mitasova, Helena
Lizenz CC-Namensnennung 3.0 Deutschland:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/31661
Herausgeber FOSS4G, Open Source Geospatial Foundation (OSGeo)
Erscheinungsjahr 2014
Sprache Englisch
Produzent FOSS4G
Open Source Geospatial Foundation (OSGeo)
Produktionsjahr 2014
Produktionsort Portland, Oregon, United States of America

Inhaltliche Metadaten

Fachgebiet Informatik
Abstract GRASS GIS, a free and open source geographic information system, provides the functionality to manage, analyze and visualize geospatial data. Recently, support for managing the temporal dimension has been integrated into GRASS GIS as a response to an increasing accessibility and importance of spatio-temporal data. However, to fully benefit from such data new capabilities for exploratory visualizations are needed. We present a set of tools for spatio-temporal data visualization which reflects data complexity and also supports online sharing. The GRASS GIS Animation Tool is a desktop application working directly with different types of spatio-temporal data stored in GRASS GIS. We can display synchronized animations of raster, vector and 3D raster data in two- and three-dimensional views. To share spatio-temporal visualizations online, we have developed web map applications which enable users to explore the data as animations or derive supporting information such as histograms. Our solution does not require any server-site application and enables a file-based offline sharing and an easy online publication without any special requirements on users' software or servers. We demonstrate the desktop and online tools on several use cases, namely solar radiation and fire spread modeling, volumetric soil moisture analysis, and cumulative cost surface visualization.
Schlagwörter animation
3D
HTML5
Leaflet
D3.js
comet-like visualization

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