dspatial-develop Mailing List for DSpatial

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Hi list,

is DSpatial still under devellopment ?

KH

Hi Bart,

I don't know exactly how DSpatial comes into the picture, but I doubt if it 
would be useful. Mapserver itself is a front-end application, so if you want 
to integrate DSpatial with it, the latter would be a backend data provider, 
much like for instance PostGIS. However, most (all?) data formats supported 
by DSpatial are also available through GDAL, which is already integrated 
with Mapserver. I am, however, interested in the possibility, although you 
would be on your own mostly as I do not have a lot of time to devote to 
this.

What would potentially be possible and interesting is having Mapserver 
initiate and handle requests to *process* data, rather than simply visualize 
it. I do not know if this possible at all, but it would be worthwhile 
investigating it.

Let me know what you intend to do, if anything at all, and I'll see where I 
can be of help.

Groeten,
Patrick
Lead developer

"Bart van den Eijnden" <BE...@Sy...> wrote in message 
news:s2e...@sy......
Hi list,

we are currently looking into the possibility of turning UMN Mapserver 
(http://mapserver.gis.umn.edu) into a C dll accessible with a Delphi 
interface.

Could DSpatial be used/extended as a front-end for this? I can think this is 
problematic because most of the stuff DSpatial does is then managed by 
Mapserver internals (visualize, symbology, reading data, query, project data 
etc). I would love to hear some ideas though how this could be integrated.

I did see PROJ.4 integration is on the DSpatial wish list, maybe this could 
open up some possiblities.

Hope to hear from you guys.

Best regards,
Bart

Bart van den Eijnden
Syncera IT Solutions
Postbus 270
2600 AG  DELFT

tel.nr.: 015-7512436
email: BE...@Sy...

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Hi Xiang,

You should first install the components in the Delphi IDE. You can do this 
by creating a new package and loading the DSpHistogram and DSpViewer in it. 
Install the package (you will get a DSpatial tab in the component list) and 
the demo should work. The DSpOStretch unit is still under development and it 
should not have ended up in the demo. You should remove all references 
(methods, unit declaration, etc) to it and then the demo should compile 
fine.

Good luck,
Patrick
Lead developer

"He Xiang" <hep...@ya...> wrote in message 
news:200...@we......
  i have download the v0.3 source code and used in
delphi6   when  i opened the project nemed DEMviewer
the IDE show a error Reading form " Class TDspViewer
not found ",and i also not found the DSpOStretch.dcu
why ?? i am very interest to try the demo program.

 thanks

                    he xiang

                             2005-07-19

___________________________________________________________
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http://cn.mail.yahoo.com/?id=77072

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Hi list,

we are currently looking into the possibility of turning UMN Mapserver =
(http://mapserver.gis.umn.edu) into a C dll accessible with a Delphi =
interface.

Could DSpatial be used/extended as a front-end for this? I can think this =
is problematic because most of the stuff DSpatial does is then managed by =
Mapserver internals (visualize, symbology, reading data, query, project =
data etc). I would love to hear some ideas though how this could be =
integrated.

I did see PROJ.4 integration is on the DSpatial wish list, maybe this =
could open up some possiblities.

Hope to hear from you guys.

Best regards,
Bart

Bart van den Eijnden
Syncera IT Solutions
Postbus 270
2600 AG  DELFT

tel.nr.: 015-7512436
email: BE...@Sy...

  i have download the v0.3 source code and used in
delphi6   when  i opened the project nemed DEMviewer
the IDE show a error Reading form " Class TDspViewer
not found ",and i also not found the DSpOStretch.dcu
why ?? i am very interest to try the demo program.

 thanks  

                    he xiang 

                             2005-07-19

___________________________________________________________ 
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http://cn.mail.yahoo.com/?id=77072

Hello DSpatial developers,

=20

Version 0.3.3 of the DSpatial kernel was released on Sourceforge =
yesterday,
together with release 0.3.2 of the gridmath module. The kernel has a few =
new
features, most notably a pixel access method, and a number of bug fixes =
and
speed enhancements. The gridmath module has new features in the shape of
windowed statistical functions and windowed filter functions. The new =
filter
functions let you apply operations such as noise reduction on satellite
imagery, or edge detection, to name a few. A library of filters will be
developed in the not too distant future. If you know of any particularly
useful filters, please email them to the developers.

=20

Documentation of DSpatial and the modules are slowly shaping up. Most of
that documentation is available on the DSpatial home page.

=20

As indicated before, the main development thrust for the kernel is =
currently
on the support for coordinate system conversions. When finished, this =
will
be released as version 0.4.0. Hopefully before long.

=20

The next gridmath module release will see mathematical operations =
involving
multiple raster bands.

=20

Also, a new demo will be developed, which will include new GUI elements.

=20

Thanks,

DSpatial development team     =20

=20

--=20
No virus found in this outgoing message.
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=20

Hello DSpatial developers,

After a long, hard slog, version 0.3.2 of the DSpatial kernel was released 
on Sourceforge today. While minor in versioning, there are some dramatic 
improvements and extensions to the kernel. These changes made an update of 
other downloads necessary as well, so the HDF driver and the gridmath module 
also have a new release available. In addition, there is a new module, 
terra, with four operations to derive surface-related parameters from 
Digital Elevation Models. Everyone is advised to start using these new 
releases and discard older code.

Documentation of DSpatial and the associated modules are *still* sorely 
lacking. Especially needed right now are detailed documents on programming 
with the DSpatial kernel and the extension modules, and on how to develop 
additional raster drivers. Since nobody stepped forward to take on this 
task, the main developer will now lay creative development to a temporary 
rest and focus on documenting what is there already.

Which is not to say that all is lost, because with the new DSpModuleBase 
facilities writing new analytical procedures is a snap. If you think you 
have a fantastic algorithm waiting to be included in DSpatial you should 
take a look at the DSpTSurface unit to see how things might be organized. 
Have fun.

Thanks,
DSpatial development team

The stars so gaily glistened... (Thu, 19 Aug 2004 14:04:11 +0000 (UTC) @627)
...while the fading voice of Patrick whispered through the darkness:

 PVL> For float types there is no real equivalent. The problem arises when
 PVL> there is a float value *exactly* equal to FMax. In that case the statement:

Please, look at my latest patch, where i tried to get around this.
I know that there is no minimal positive for double, like 1 for integer.
(there is, of course, but not in the terms of histogram)

 PVL> The problem is that the math dictates that FMax will fall outside
Yes, yes...
At last i had to patch it :-P

 PVL> maximum value (i.e. multiply by 1.0000000000001).

Funny trick. You're are correct, that was the simpliest way around this.
But instead i burried myself into the Code :-)
-- 
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http://Arioch.nm.ru/FL/Fidolook_SL.png    Mail: the_Arioch<at>nm<dot>ru

Arioch /BDV/ <the_Arioch <at> nm.ru> writes:

> For all integer-flavored Histo's thelast line looks like
> 
>   scale := FBins / (Max - Min + 1);
> 
> But for float - there is no that '+1' - what to do ?
> 
Hi Arioch,

For float types there is no real equivalent. The problem arises when there is a 
float value *exactly* equal to FMax. In that case the statement:

  Inc(FHisto[Floor((dp^ - FMin) * scale)]);

tries to update FHisto[Length(FHisto)], which obviously does not exist. The 
problem is that the math dictates that FMax will fall outside of the range, 
i.e. [FMin, FMax>, which is not very elegant. The solution would be to add a 
test to see if the data value equals FMax (i.e. if dp^ = FMax then Inc(FHisto
[FBins-1]) else ...), but this adds to the processing time. Alternatively (what 
I typically do), pass a max value to the constructor that is slightly larger 
than the maximum value (i.e. multiply by 1.0000000000001).

Cheers,
Patrick

The stars so gaily glistened... (Tue, 1 Jun 2004 23:52:10 +0400 @869)
...while the fading voice of Arioch whispered through the darkness,
making lonely ghost of Patrick tremble:

Trying to once more revise Float histograms, when in some singular cases it
might appear that Max = Min

-- 
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The stars so gaily glistened... (Tue, 1 Jun 2004 23:52:10 +0400 @869)
...while the fading voice of Arioch whispered through the darkness,
making lonely ghost of Patrick tremble:

new patch:

Some bugs(imho) fixed
Added that workaround `Max-Min+1 ` for float data.
Introduced SubMarks - to see very little values, where round(len) = 0;
Introduced Integrial view mode, in difference with current integrial one.

-- 
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Hello, All!

=========Beginning of the citation==============
function TDSpHistoFloat32.AddData(const data: pointer; num: integer):
cardinal;
var i: integer;
    sp: PDSpFloat32;
    scale: TDSpFloat64;
begin
  sp := data;
  scale := FBins / (FMax - FMin);
=========The end of the citation================

For all integer-flavored Histo's thelast line looks like

  scale := FBins / (Max - Min + 1);

But for float - there is no that '+1' - what to do ?

-- 
WinAMP://none: WinAMP is suffocated
http://Arioch.nm.ru/FL/Fidolook_SL.png    Mail: the_Arioch<at>nm<dot>ru

The stars so gaily glistened... (Sat, 10 Apr 2004 20:03:33 -0600 @127)
...while the fading voice of Patrick whispered through the darkness:

 >> Also i modified a bit Histogram, please see attach - i put my nickname
 >> at the lines, i changed. 
 P> Thanks, I'll have a look at it.

Will You, please ?

PS: please, remind me, what means Bins parameter in TdspHistoUInt8.Create ?
Isn't it just Max-Min+1 ?
-- 
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Dear Open Source developer

I am doing a research project on "Fun and Software Development" in which I kindly invite you to participate.
You will find the online survey under http://fasd.ethz.ch/qsf/. The questionnaire consists of 53 questions and you will need about 15 minutes to complete it.

With the FASD project (Fun and Software Development) we want to define the motivational significance of fun when software developers decide to engage in Open Source projects. What is special about our research project is that a similar survey is planned with software developers in commercial firms. This procedure allows the immediate comparison between the involved individuals and the conditions of production of these two development models. Thus we hope to obtain substantial new insights to the phenomenon of Open Source Development.

With many thanks for your participation,
Benno Luthiger

PS:
The results of the survey will be published under http://www.isu.unizh.ch/fuehrung/blprojects/FASD/.
We have set up the mailing list fa...@we... for this study. Please see http://fasd.ethz.ch/qsf/mailinglist_en.html for registration to this mailing list.

_______________________________________________________________________

Benno Luthiger
Swiss Federal Institute of Technology Zurich
8092 Zurich

Mail: benno.luthiger(at)id.ethz.ch
_______________________________________________________________________
The stars so gaily glistened... (Mon, 10 May 2004 17:51:31 -0600 @35)
...while the fading voice of Patrick whispered through the darkness:

 P> Replied on the forum.

Thank You a lot.
-- 
WinAMP://none: WinAMP is suffocated
http://Arioch.nm.ru/FL/Fidolook_SL.png    Mail: the_Arioch<at>nm<dot>ru

>
> Was it hard to set this forum on gmane ?
> Could You put some words at
> http://sourceforge.net/forum/forum.php?thread_id=1053679&forum_id=107245 ?
>
Replied on the forum.

Cheers,
Patrick

Hello, All!

Was it hard to set this forum on gmane ?
Could You put some words at
http://sourceforge.net/forum/forum.php?thread_id=1053679&forum_id=107245 ?

Thank You!

-- 
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Hello, Patrick!

 P> included with the zip file. Hey, it is even available through the CVS!!

I know, i know, but ain't programmers one of progress'es engines? I am,
hence i am lazy :-)

 P> Thanks, I'll have a look at it.

IS is based on outdated version, but...
Ok, now gonna review Your last changes from CVS

Happy holidays !!!
-- 
[tip] Fix for Outlook Express quoting: http://Arioch.nm.ru/FL/Fidolook_SL.png
E-mail is faked because of spam.   the...@NM...

Hi Arioch,
>
> c:\cvs\DSpatial\v0.3\ - no *.dpk
>
Ah. Well, I suppose the easy answer could be that if you wish to use the CVS
directly you are a hard-core developer so you want to build your own
packages anyways. {;-D (I'll see what I can do.)

> GridMath - what is it ?
>
It does mathematical functions on raster bands. Check out the demo included
with the zip file. Hey, it is even available through the CVS!!

> I'd like to see some changelog on CVS :-) Yes, i know it is easy to wish
> anything :-)
>
There is a brief change log at the beginning of each unit, but I agree that
it is very summary.

> Also i modified a bit Histogram, please see attach - i put my nickname at
> the lines, i changed.
>
Thanks, I'll have a look at it.

Cheers,
Patrick

Hello, Patrick!

 P> This has now been solved and the CVS is
 P> up to date.

I've updated soem days ago, but did not have a look yet.
So may complains mught be outdated :-)
I'm offline now and can't do update :-)

c:\cvs\DSpatial\v0.3\ - no *.dpk

GridMath - what is it ?

I'd like to see some changelog on CVS :-) Yes, i know it is easy to wish
anything :-)

Comments like Last modified : 2004 March 26    - JCL and JVCL just replaced
them with $Id$ CVS placeholder :-)

Also i modified a bit Histogram, please see attach - i put my nickname at
the lines, i changed.

-- 
[tip] Fix for Outlook Express quoting: http://Arioch.nm.ru/FL/Fidolook_SL.png
E-mail is faked because of spam.   the...@NM...

Hi Arioch,

>
> Will You update CVS ?
>

The problem with the CVS had something to do with the synchronization
between the remote and the local repository, which in turn was caused by an
authentication problem at SF. This has now been solved and the CVS is up to
date.

Cheers,
Patrick

Hello, Patrick!

Will You update CVS ?

-- 
[tip] Fix for Outlook Express quoting: http://Arioch.nm.ru/FL/Fidolook_SL.png
E-mail is faked because of spam.   the...@NM...

"Arioch" <the...@nm...> wrote in message
news:c4r7qn$eti$1...@se......
> Hello, All!
>
> testing of this newsgroup
>
Well, that seemed to work!

Patrick

Hello, All!

testing of this newsgroup

-- 
[tip] Fix for Outlook Express quoting: http://Arioch.nm.ru/FL/Fidolook_SL.png
E-mail is faked because of spam.   the...@NM...

Hello DSpatial developers,

Version 0.3.1 of the DSpatial kernel was released on Sourceforge today.
This is a maintenance release with no new features, but a truckload of
bug fixes. Most of these bugs came to light during the development of
release 0.1.2 of the gridmath module, also newly available today.

The new gridmath module release 0.1.2 contains a new unit that
implements a fairly extensive array of mathematical functions that
operate on a single raster band. These functions include simple
arithmetic, trigonometry, power and logarithms, and a few support
functions. With this module it is now for the first time possible to
manipulate raster data with DSpatial!

Attention is now shifting back to the kernel where a so-called filtered
data access object is being developed. This filter maintains a defined
region of a raster band and it supports notions such as current pixel
and relative pixel addressing. This filter access will greatly reduce
the complexity of analysis functions that operate on multiple raster
bands, or local functions on a single raster band such as those to be
included in the terra and orbit modules.

Documentation of DSpatial and the gridmath module are still sorely
lacking. Especially needed right now are detailed documents on
programming with the DSpatial kernel and the extension modules, and on
how to develop additional raster drivers. A volunteer who could take
this task on would be greatly appreciated.

A DSpatial news group has just been added on news.gmane.org. The news
group gmane.comp.gis.dspatial.devel is a news mirror of the mailing list
on SourceForge. The news group has been added to lower the effort to
discuss DSpatial issues, using your news reader of choice. More news
groups will be added on GMane when the need arises.

Thanks,
DSpatial development team      

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