Re: [udig-devel] kernel density

[ismet <iozozturk@xxxxxxxxx>]

Thanks for the opinions Andrea. I am working on it. I didn't realize JGrasstools mailinglist at first, will discuss further issues there.

İsmet

On Tue, Jul 17, 2012 at 8:40 AM, andrea antonello <andrea.antonello@xxxxxxxxx> wrote:

> I did confused grass and jgrass, true. I want to have a raster heat map
> after a kernel density estimation process on a vector shape file. First i
> headed to jgrass gis(udig 1.2 product) downloaded and began trying on grass
> console in it. I tried hard on importing vector files into mapset and
> running v.kernel from console on the shapefile. I think it is impossible to
> display the vector files imported into mapset. After kernel processing what
> i usually get is a yellow square raster image.

Well, this is not the right mailinglist for GRASS issues. If you have
problems with the v.kernel command, you should issue them in the grass
mailinglist.

> I found KernelDensity class here:
> http://code.google.com/p/jgrasstools/source/browse/hortonmachine/src/main/java/org/jgrasstools/hortonmachine/modules/statistics/kerneldensity/KernelDensity.java
>
> Is this class what you were talking about?

yes

> If it is, can you please simply
> tell me what do i have to do in order to achieve my goal? I know developing
> on an open-source project has its difficulties but i am working on this goal
> not hours not days not weeks but longer. i really do appreciate by your
> helps on this subject.

Well, I am not sure where you looked for all these weeks, but the
KernelDensity class is a very simple one.
It takes a raster with points in input, some kernel parameters and
spits out the calculated map. Something you would do very quickly if
you have your data ready.

Ismet, this is not the right mailinglist for JGrasstools issues.
Please, let's take this discussion to the JGrasstools mailinglist.

Andrea

>
> İsmet
>
>
> On Wed, Jul 11, 2012 at 12:16 PM, andrea antonello
> <andrea.antonello@xxxxxxxxx> wrote:
>>
>> Hi Ismet,
>>
>> > Working with udig for a few months and read lots of mails in the list.
>> > Simply i want to make a kernel density estimation from a shapefile and
>> > get a
>> > raster heat map in the result. I worked hard with jgrass gis(v.kernel
>> > with
>> > the console) and udig but couldnt accomplished my goal yet.
>>
>> First I think you are confusing grass and jgrass.
>> Secondo, what did you do exactly? Did you produce some code? Maybe one
>> that is accessible? Did you get some results but they are wrong?
>>
>> > Can you show me the way in simple steps and i want to try harder and
>> > check
>> > what i am doing wrong. Thanks in advance.
>>
>> You should better define what you want to achieve and what you did
>> already.
>> I already told you in a previous email that there is a kernel density
>> module in the jgrasstools library and that as such it is accessible
>> from the Spatial Toolbox.
>> What are the issue that are blocking you?
>>
>> Andrea
>>
>>
>> >
>> > İsmet
>> >
>> > _______________________________________________
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>> > http://udig.refractions.net
>> > http://lists.refractions.net/mailman/listinfo/udig-devel
>> >
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>
>
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