<HTML dir=ltr><HEAD><TITLE>Re: [Gvsig_english] Gvsig_internacional Digest, Vol 47, Issue 12</TITLE>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>Hello,</FONT></DIV>
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<DIV dir=ltr>I have tested transformation 1780 in gvSIG 1.9 and it works very much as in your screenshot. Video here:</DIV>
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<DIV dir=ltr><A href="http://www.youtube.com/watch?v=uO77sGgakE0">http://www.youtube.com/watch?v=uO77sGgakE0</A></DIV>
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<DIV dir=ltr>I get these errors:</DIV>
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<DIV dir=ltr>0.23 m (near the Baltic Sea)<BR>0.52 m</DIV>
<DIV dir=ltr>0.26 m<BR>0.99 m<BR>1.78 m<BR>5.58 m (near Switzerland)</DIV>
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<DIV dir=ltr>This was done on Windows XP.</DIV>
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<DIV dir=ltr>Regards,</DIV>
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<DIV><FONT face="Courier New" size=2><FONT face="Times New Roman" size=3>Juan Lucas Domínguez Rubio<BR></FONT>---</FONT></DIV>
<DIV><FONT face="Courier New" size=2><FONT face="Courier New" size=2><FONT face="Courier New" size=2>Prodevelop SL, Valencia (España)</FONT></DIV>
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<DIV><FONT face="Courier New" size=2>Tlf.: 96.351.06.12 -- Fax: 96.351.09.68<BR></FONT><A href="http://www.prodevelop.es/"><FONT face="Courier New" size=2>http://www.prodevelop.es</FONT></A><BR><FONT face="Courier New" size=2>---</FONT></DIV></FONT></DIV></FONT></DIV>
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<FONT face=Tahoma size=2><B>De:</B> gvsig_internacional-bounces@listserv.gva.es en nombre de Juan Lucas Dominguez Rubio<BR><B>Enviado el:</B> dom 13/12/2009 17:07<BR><B>Para:</B> Users and Developers mailing list; gvsig_internacional@listserv.gva.es<BR><B>Asunto:</B> Re: [Gvsig_english] Gvsig_internacional Digest, Vol 47, Issue 12<BR></FONT><BR></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>Hello, Heinz. </FONT><FONT face="Times New Roman" color=#000000 size=3>Thanks for the screenshot, it's very illustrative.</FONT></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>I have found this little table showing the coordinates of a certain 'Trigonometrischer Punkt':</FONT></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3><A href="http://www.geocaching.com/seek/cache_details.aspx?guid=86b14112-20d3-4950-8364-86f983f0484d">http://www.geocaching.com/seek/cache_details.aspx?guid=86b14112-20d3-4950-8364-86f983f0484d</A></FONT></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>I have applied the GSB grid to that and the coordinates I obtained in EPSG:25832 are only 3 cm (0.03 m) away from the coordinates seen in that table, which is a reasonable error. Anybody knows if there is somewhere a larger table showing more official 'Trigonometrischer Punkt' like that one?</FONT></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>Tomorrow I'll test the 1780 transformation with gvSIG 1.9 and tell you what happens.</FONT></DIV>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=3>Regards,</FONT></DIV>
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<DIV><FONT face="Courier New" size=2><FONT face="Times New Roman" size=3>Juan Lucas Domínguez Rubio<BR></FONT>---</FONT></DIV>
<DIV><FONT face="Courier New" size=2><FONT face="Courier New" size=2><FONT face="Courier New" size=2>Prodevelop SL, Valencia (España)</FONT></DIV>
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<DIV><FONT face="Courier New" size=2>Tlf.: 96.351.06.12 -- Fax: 96.351.09.68<BR></FONT><A href="http://www.prodevelop.es/"><FONT face="Courier New" size=2>http://www.prodevelop.es</FONT></A><BR><FONT face="Courier New" size=2>---</FONT></DIV></FONT></DIV></FONT></DIV>
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<FONT size=2><FONT face=Tahoma><FONT face="Times New Roman">> </FONT><STRONG>De:</STRONG> gvsig_internacional-bounces@listserv.gva.es en nombre de Heinz Mundhenk<BR><FONT face="Times New Roman">> </FONT><STRONG>Enviado el:</STRONG> sáb 12/12/2009 19:36<BR><FONT face="Times New Roman">> </FONT><STRONG>Para:</STRONG> gvsig_internacional@listserv.gva.es<BR><FONT face="Times New Roman">> </FONT><STRONG>Asunto:</STRONG> Re: [Gvsig_english] Gvsig_internacional Digest, Vol 47, Issue 12<BR></FONT>> </FONT><BR></DIV>
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<P><FONT size=2>> Hello Juan Lucas Dominquez,<BR>> <BR>> i think the coordinates in the BETA2007testdata.csv are<BR>> first class and basicly used for the grid-calculation BETA2007.gsb.<BR>> <BR>> I have tried the transformation 1780 in gvSIG 1.9 again, but<BR>> with the same bad results ... but nobody is perfect.<BR>> <BR>> For a manual transformation from GK3 EPSG:31467 to ETRS89/UTM32N<BR>> EPSG:25832 i have found some parametersets here<BR>> <BR>> www.crs-geo.eu -> CRS Description -> national CRS<BR>> <BR>> Using the same testdata and the parameterset for the n o r t h<BR>> of former Westgermany the errors are less 1 m. So a seven-<BR>> parameter-transformation with change of the geo-datum in gvSIG 1.9<BR>> in general seems to work. For more details of the last test see the attachment.<BR>> <BR>> By the way, what about a tool for transforming lots of shapes/rasters<BR>> in a batch-mode in future gvSIG-versions (like the batch-project tool in ArcGIS) ? In this context a file with testdata (included in the batch stuff) is very usefull to verify the handling of the transformation.<BR>> <BR>> Greetings <BR>> <BR>> Heinz<BR><BR><BR>-------- Original-Nachricht --------<BR>> Datum: Sat, 12 Dec 2009 12:00:10 +0100<BR>> Von: gvsig_internacional-request@listserv.gva.es<BR>> An: gvsig_internacional@listserv.gva.es<BR>> Betreff: Gvsig_internacional Digest, Vol 47, Issue 12<BR><BR>> Send Gvsig_internacional mailing list submissions to<BR>> gvsig_internacional@listserv.gva.es<BR>><BR>> To subscribe or unsubscribe via the World Wide Web, visit<BR>> <A href="http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional">http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional</A><BR>> or, via email, send a message with subject or body 'help' to<BR>> gvsig_internacional-request@listserv.gva.es<BR>><BR>> You can reach the person managing the list at<BR>> gvsig_internacional-owner@listserv.gva.es<BR>><BR>> When replying, please edit your Subject line so it is more specific<BR>> than "Re: Contents of Gvsig_internacional digest..."<BR>><BR>><BR>> Today's Topics:<BR>><BR>> 1. Re: No problems reprojecting from GK to UTM usingBETA2007<BR>> (Juan Lucas Dominguez Rubio)<BR>><BR>><BR>> ----------------------------------------------------------------------<BR>><BR>> Message: 1<BR>> Date: Fri, 11 Dec 2009 22:47:14 +0100<BR>> From: "Juan Lucas Dominguez Rubio" <jldominguez@prodevelop.es><BR>> Subject: Re: [Gvsig_english] No problems reprojecting from GK to UTM<BR>> usingBETA2007<BR>> To: "Users and Developers mailing list"<BR>> <gvsig_internacional@listserv.gva.es>,<BR>> <gvsig_internacional@listserv.gva.es><BR>> Message-ID:<BR>> <E43C32BC5843E34FB4C00CDFAAAAF7D8017B4DB9@australia.prodevelop.local><BR>> Content-Type: text/plain; charset="iso-8859-1"<BR>><BR>> Hello, Heinz:<BR>> <BR>> I have done the test you describe and indeed the points in the CSV file<BR>> are not a subset of the GSB grid, but the error is almost zero. If we are<BR>> honest, we'll have to look for an explanation, no? Here is my guess: the CSV<BR>> file was created using the GSB grid. I misunderstood the goal of that<BR>> verification file (perhaps the Australian file too?). They are not used to check<BR>> if the grid works fine. They are used to check that your GIS software knows<BR>> how to deal with the grid. This is my second hypothesis :-)<BR>> <BR>> As for the transformation with code 1780 available in gvSIG, I have used<BR>> it and get the expected errors (< 5m):<BR>> <BR>> 3.43 m<BR>> 2.85 m<BR>> 0.15 m<BR>> etc.<BR>> <BR>> Perhaps you have not chosen the right options? I have used gvSIG 1.1.2<BR>> because I am on Windows Vista.<BR>> <BR>> <BR>> Regards,<BR>> <BR>> Juan Lucas Dom?nguez Rubio<BR>> ---<BR>> Prodevelop SL, Valencia (Espa?a)<BR>> Tlf.: 96.351.06.12 -- Fax: 96.351.09.68<BR>> <A href="http://www.prodevelop.es/">http://www.prodevelop.es</A> <<A href="http://www.prodevelop.es/">http://www.prodevelop.es/</A>><BR>> ---<BR>><BR>> ________________________________<BR>><BR>> > De: gvsig_internacional-bounces@listserv.gva.es en nombre de Heinz<BR>> Mundhenk<BR>> > Enviado el: jue 10/12/2009 18:07<BR>> > Para: gvsig_internacional@listserv.gva.es<BR>> > Asunto: Re: [Gvsig_english] No problems reprojecting from GK to UTM<BR>> usingBETA2007<BR>> ><BR>><BR>><BR>> > Dear list,<BR>> ><BR>> > here is another working grid-based reprojektion for Germany.<BR>> ><BR>> > Reprojecting from GK to ETRS89/UTM using grid BETA2007<BR>> ><BR>> > In the next years coordinates from different old SRS in<BR>> > Germany will change to the new projection ETRS89/UTM<BR>> > with EPSG:25832 (Westgermany) and 25833 (Eastgermany).<BR>> ><BR>> > Most old SRS in former Westgermany are based on the Gauss-Krueger-<BR>> > Projektion (GK, EPSG:31466, 31467 and 31468).<BR>> ><BR>> > The transition from GK to UTM can be done with the integrated<BR>> > "transformation on the fly" in gvSIG for errors lower than 5 meters.<BR>> ><BR>> > If you use the grid "BETA2007.gsb", the error is lower than 1 meter.<BR>> ><BR>> > Here you can get the grid and coordinates for a tests :<BR>> ><BR>> > www.crs-geo.eu/BeTA2007<BR>> ><BR>> > files BETA2007.gsb (85 kByte)<BR>> > BETA2007testdaten.csv (12 kByte)<BR>> ><BR>> > On this website you find lots of additional informations.<BR>> ><BR>> > For a test make a dfb-file from the csv-file by selecting all records<BR>> > with Quell-Bezugssystem (source) = DE_DHDN_3GK3<BR>> > and Ziel-Bezugssytem (target) = ETRS89_UTM32.<BR>> ><BR>> > From this dbf-table create the shape (with testpoints)<BR>> > GK3_31467.shp using Quell-X and Quell-Y for X- and Y-coodinates.<BR>> ><BR>> > How to integrate the *.gsb - file in gvSIG 1.9 ?<BR>> ><BR>> > Make a view with SRS-property EPSG:25832 (ETRS89/UTM32) and add the<BR>> > testpoint-shape with the SRS-Property EPSG:31467, using<BR>> grid-transformation<BR>> > (with german-program-surface/skin : NTv2 Format Raster- Datei).<BR>> > In the next window click the button Import and select the<BR>> > previous downloaded grid BETA2007.gsb.<BR>> ><BR>> > Then Export the reprojected shape under the name UTM32_25832.shp and add<BR>> it to<BR>> > the view. Now you can add the fields X and Y and calculate x() and y().<BR>> > Then calculate the difference between Ziel-X and X / Ziel-Y and y.<BR>> > The Errors are lower 0.01 meters ! The testpoints are no grid-points !<BR>> ><BR>> > Observations<BR>> ><BR>> > 1. The reprojektion with the grid does not work in the reverse order<BR>> > from UTM to GK.<BR>> ><BR>> > 2. Reprojection from GK to UTM with gvSIG using the same testpoint-shape<BR>> > and the integrated EPSG-transformations 1780 or 15948 result with<BR>> > errors between 100 and 200 meters ! Why ?<BR>> ><BR>> > Greetings<BR>> ><BR>> > Heinz Mundhenk<BR>> > hmundhenk@gmx.de<BR>> ><BR>><BR>> -------------- next part --------------<BR>> An HTML attachment was scrubbed...<BR>> URL:<BR>> <A href="http://listserv.gva.es/pipermail/gvsig_internacional/attachments/20091211/c70719cb/attachment-0001.htm">http://listserv.gva.es/pipermail/gvsig_internacional/attachments/20091211/c70719cb/attachment-0001.htm</A><BR>><BR>> ------------------------------<BR>><BR>> _______________________________________________<BR>> Gvsig_internacional mailing list<BR>> Gvsig_internacional@listserv.gva.es<BR>> <A href="http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional">http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional</A><BR>><BR>><BR>> End of Gvsig_internacional Digest, Vol 47, Issue 12<BR>> ***************************************************<BR><BR>--<BR>Viele Grüße<BR><BR>Heinz Mundhenk<BR><BR>Tel. 05281 / 163742<BR>e-mail hmundhenk@gmx.de<BR><BR>GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!<BR>Jetzt freischalten unter <A href="http://portal.gmx.net/de/go/maxdome01">http://portal.gmx.net/de/go/maxdome01</A><BR></FONT></P></DIV></DIV></BODY></HTML>