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Dao Viet Nga · 2012-03-30 at 17:28

This plugin looks amazing. this is what exactly i needed for my project. Thanks for your great work!
However, i have trouble in understanding of how the raster data should be? Could you please explain for me something since i am totally new in this GIS field?
i want to display multi variable ( power, voltage, price) over time. What i do is to create raster data for a specific time such as power at first hour, at 2nd hour, etc.. Then name those raster file as regular expression such as power-hour-1, power-hour-2, then load it into multiview. However, after i do that, nothing display in canvas.
I am really stuck.
Could you please give me some advice on that?
Thanks a lot

    marco · 2012-03-30 at 17:46

    hi,
    name the data something like:
    SnowdepthS0004N0001: (using Ndddd and Sdddd as RegExp)
    – variablename: snowdepth
    – Time resolution: S0004
    – Time step: N0001
    Select the files you need and hit load in the multi temporal data loader. you will be asked to what time resolution S0004 corresponds. for example hourly data are 3600s.
    once the data are loaded you need to turn on the layergroup in which they are.
    hope it helps
    ciao

Dao Viet Nga · 2012-03-30 at 18:14

Thanks a lot for your reply, I will give it a try.

Dao Viet Nga · 2012-03-30 at 18:26

Hi Marco,
I test the data in the link above, click on check box of group data layer as well variables, but still nothing display on the timeplot canvas. Is there any additional library or plugin i should install?
Thanks a lot,
Nga

Dao Viet Nga · 2012-03-30 at 18:30

I am using QGIS 1.9 with python 2.7

marco · 2012-03-30 at 18:48

what tracking is enabled? do you see the data in the _MAP_ canvas?

Dao Viet Nga · 2012-03-30 at 19:16

The right click mode

marco · 2012-03-30 at 19:24

then you need to richt click on the map canvas to set the location you want to analyse. or with the mouse move you can just move around

Dao Viet Nga · 2012-03-30 at 19:32

I already tried to click many time there, but still nothing display

marco · 2012-03-30 at 19:47

did you select a variable to show? did you try mousemove? try looking into the raw data tab

Dao Viet Nga · 2012-03-31 at 05:37

Hi Marco,
Thanks for your instruction, the data already can be display in time plot.
There are something i not yet understand hope u can explain for me.
I really dont understand what is time step for, like N0001, N0002. Could u plz give me example of that?
Does one of your raster file store data at given location at given time? If so, how the program know data at given location at different time? i am really confused about this.
Many thanks,
Nga

    marco · 2012-03-31 at 12:35

    Hi the N0005 means the 5th time interval. If the intervall is hourly, then N0005 is 4hours after the starting date which you can set and is N0000
    Ciao

Dao Viet Nga · 2012-03-31 at 18:50

Hi Marco,
So does it mean if i want to display 24 hours data in time plot, ,assume f my regular expression for time step is dd and time resolution is -hourly then i need to have 24 raster data named power01-hourly, power02-hourly, and so on. Is it correct?
Thanks a lot,
Nga

marco · 2012-03-31 at 18:55

yes, I would suggest you naming the files
power-h-00
power-h-01
costs-h-00
costs-h-01
and use -w for Intervall and -dd for step.
a full day will need 24 file x number of variables
ciao

Dao Viet Nga · 2012-03-31 at 19:08

May I ask is it w is for 1 character and d is for 1 number?
Many thanks,
Nga

marco · 2012-03-31 at 19:09

yes. see: http://regexpal.com/

Dao Viet Nga · 2012-03-31 at 19:21

Thousand thanks for your help!
Nga

marco · 2012-03-31 at 19:22

No prob. If you get nice screen shots I’d be nice if you share them
ciao

Dao Viet Nga · 2012-03-31 at 19:24

okk. i will

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