Hi all,
working around Edgar Soldin's Coordinate transformation plugin I finally
reached the (un)-famous problem of setting Bursa-Wolf parameters (BW) for the
tranformation between different datum/projections.
I realize that the problem is not so simple as it is shows:
1) despite the EPSG o
Hi Edgar,
just a question about your plugin
I saw in the cs.conf file that the wkt spec of EPSG codes are writen 2 times
***
#PROJCS["WGS 84 / UTM...
#GEOGCS["WGS 84"
...
PROJCS["WGS 84 / UTM...
GEOGCS["WGS 84"
...
***
Hi,
I did a test with the CTS plugin.
As control I used Taspunto, a software for Italian coordinate transformation
edited by Italian government. This software doen't use formulas for
transformation but on a grid of points (1500) in the Italian territory and
surroundings. It is considered to
Hi Peppe,
As you mention, bursa-wolf transformation is not always enough to make
precise transformation between old local reference system and new
spatial reference system.
The advantage is that it relies on a set of only 7 parameters and a well
known algorithm.
To do more precise transformatio
Stefan,
Thank you for posting links to those references.
SS
On Thu, May 1, 2008 at 4:16 PM, Stefan Steiniger <[EMAIL PROTECTED]> wrote:
> Hei,
>
> GPL and LGP fit and any other license that is not proprietary (e.g.
> Apache, BSD).
> Look for instance here: http://www.fsf.org/licensing/licenses/
-- Forwarded message --
From: Sunburned Surveyor <[EMAIL PROTECTED]>
Date: Thu, May 1, 2008 at 11:51 AM
Subject: Re: The first module for GMGDP
To: Stefan Steiniger <[EMAIL PROTECTED]>
Leandro,
You wrote: "About user interface we can look a code of SEXTATE, for gvSIG."
I didn't
Michael wrote: "It is now recommended to use a grid to interpolate
precise parameters
which makes it possible to get a precision of a few centimeters.
I don't know what is the system used in USA, but I know that Canada and
Australia also use grid based transformations (or corrections?) based on
NTV
Michael wrote: " I'm on the way of writing a new library for
coordinate transformation,
and I'm interested by your experience, as my goal is to manage properly
3D and grid-based transformations, not only projections and BW
transformations."
Is there any way you could integrate this code into the C
I've got a question about the best way to implement the the plug-in
I'm working on for CRS transformations.
This plug-in will use the CRS code from the deegree library to perform
a transformation. The GUI of the plug-in asks the user to select the
Layer that is the target of the transformation, an
Hi Michael
>.. a precision of 1-2m (5m at worst), which is not that good.
>It is now recommended to use a grid to interpolate precise parameters which
> makes it possible to get a precision of a few centimeters..
I am aware of this. Since my original interest was the "geological map
Sunburned Surveyor a écrit :
> As surveyors we always hit local control monuments to calculate a
> "best fit" datum transformation. This is neede because "one size fits"
> all transformations between horizontal datums in the states aren't
> always precise. This is especially true when moving from h
Interesting! Landon.
I will be glad to test your plugin when ready, comparing to Edgar's one, with
Italian projections
Peppe
Sunburned Surveyor <[EMAIL PROTECTED]> ha scritto:
I've got a question about the best way to implement the the plug-in
I'm working on for CRS transformations.
Peppe,
I'm glad you'll be ready to run some tests for me! Hopefully we can do
this next week. I'm excited about tapping into the deegree libraries
for OpenJUMP!
The Sunburned Surveyor
On Fri, May 2, 2008 at 9:01 AM, Giuseppe Aruta <[EMAIL PROTECTED]> wrote:
> Interesting! Landon.
>
> I will be g
Hi SS,
I have wondered about this myself. For example, in ArcGIS when you open
layers that have a different coordinate system and it reprojects on-the-fly,
does it change the layer's geometry permanently. In other words, if you
made changes to the layer and saved the changes, would it then sav
So.. my two cents on the topic
on European CRS. I can recommend this site that also should have some
parameters for the different countries:
http://crs.bkg.bund.de/crs-eu/
On the question with the warping tool. Of course, one could calculate
the BW paramters. But the problem is that this would
Sunburned Surveyor a écrit :
> Michael wrote: " I'm on the way of writing a new library for
> coordinate transformation,
> and I'm interested by your experience, as my goal is to manage properly
> 3D and grid-based transformations, not only projections and BW
> transformations."
>
> Is there any w
Jody wrote: "Frank W also had the idea of sharing conformance code
(test cases etc...). I would recommend starting by sharing the test
cases (maybe set up a quick facade so that the test cases could talk
to each library in turn?)"
You may have to explain thise test cases to me in a little more
det
>> in both situation there is a "Number format exception"
>> error. I wrote down on files "OJ_Kosmo error log.txt"
>> and OJ_uDig error log.txt"
>I'm sure I can handle these. Next week I'm sure I'll have an update on that.
Hi Andreas,
write me when you think to do it so I can do a test
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