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Subject Author Date
time series and gis kholer 10-26-2005
---> Re: time series and gis willem van deur...10-27-2005
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Posted by kholer on October 26, 2005, 8:59 pm
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 Hi, I am newbie in the GIS field. Before I start to study I would know if it
can solve my problem for this reason I am asking to you: I have different
time series sampled in different points in a territory, is it possible to
create a GIS containing time series?
thank you




Posted by PJ Halls on October 27, 2005, 8:53 am
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 kholer wrote:
>
> Hi, I am newbie in the GIS field. Before I start to study I would know if it
> can solve my problem for this reason I am asking to you: I have different
> time series sampled in different points in a territory, is it possible to
> create a GIS containing time series?
> thank you

The simple answer is 'yes', but the rider is 'depending upon what
precisely you require'. Many people use GIS for the analysis and
modelling of change, although different products vary in their provision
of appropriate tools. If you are simply looking for a visualisation
facility, to animate the change process, for example, then you may need
to explore a visualisation product *in addition to* the GIS. You will
need to explore the principles and methodologies of Spatial Analysis, in
addition to the 'more conventional' mapping tools - and your choice of
GIS product may depend upon the availability of effective and
appropriate tools for analysis, rather than display.

This is a field for which there is a great deal of very good literature
and concerning which more is continually being published. The
discipline specific fields of demography and ecology are particularly
well covered.

Peter

-----------------------------------------------------------------------


Posted by willem van deursen on October 27, 2005, 11:12 am
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PCRaster can do this for you. See www.pcraster.nl and
http://pcraster.geog.uu.nl/introduction/introduction.html

Willem

kholer wrote:

> Hi, I am newbie in the GIS field. Before I start to study I would know if it
> can solve my problem for this reason I am asking to you: I have different
> time series sampled in different points in a territory, is it possible to
> create a GIS containing time series?
> thank you
>
>

--
Willem van Deursen, The Netherlands
wvandeursen_nospam@nospam_carthago.nl
replace _nospam@nospam_ for @ to get a valid email address
www.carthago.nl



Posted by colinr23 on October 27, 2005, 7:51 pm
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GIS doesnt handle time in a very intuitive way. You can create
snapshot layers and calculate spatial stats and compare between layer,
but its not real spatiotemporal anlysis. If you're looking to see if
your observations occur clustered in both space and time, there's some
space-time stats you can calculate (Knox test, Mantel test, Space-time
nearest neighbor)which can indicate if there is space-time clustering
in data.

As was said earlier, different software can do different things. For
mainstream GIS (ie ESRI) there isnt a lot of space-time stuff. But in
open source stats packages you can find tools to do analysis.


willem van deursen wrote:
> PCRaster can do this for you. See www.pcraster.nl and
> http://pcraster.geog.uu.nl/introduction/introduction.html
>
> Willem
>
> kholer wrote:
>
> > Hi, I am newbie in the GIS field. Before I start to study I would know if it
> > can solve my problem for this reason I am asking to you: I have different
> > time series sampled in different points in a territory, is it possible to
> > create a GIS containing time series?
> > thank you
> >
> >
>
> --
> Willem van Deursen, The Netherlands
> wvandeursen_nospam@nospam_carthago.nl
> replace _nospam@nospam_ for @ to get a valid email address
> www.carthago.nl



Posted by kholer on October 29, 2005, 7:28 am
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> Hi, I am newbie in the GIS field. Before I start to study I would

Thank you to everyones, I have understood something more about GIS. It
doesn't seem to be easily adaptable to my problem. Anyway I have found very
interesting PCRaster software.
tnx




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