I will note that the shapefile you gave me did not quite match the EPSG code you found; as you noted the EPSG code has a different orientation.
I would suggest you trust the shapefile; chances are the people that provided it intended the projection they used - and it may not actually line up with an EPSG code. Jody On Sun, Mar 15, 2009 at 4:49 PM, Jody Garnett <[email protected]> wrote: > I was able to work with the files your provided no problem in uDig 1.2-M3. > > uDig is able to work with shapefiles without a projection; they show > up as "generic 2d" or something - which is fine as long as your map is > also generic 2d. > > If you do want them to work with other datasets you will need to right > click on a layer and assign them a projection. > > Thanks for sending me the data set. > Jody > On Tue, Feb 24, 2009 at 8:25 AM, Laura <[email protected]> wrote: >> Hi Jody, >> >> if you want to try to use epgs 26591 go to >> http://www.cartografia.regione.lombardia.it/usedde/clientDDE.jsp, select a >> group and pick a layer you like. They will send you the file in some >> minutes... If you prefer I can attach the files in a mail... As you can see >> the layers I am using have also the prj file. >> >> Is udig unable to read maps without the prj files? (Is arcview so >> intelligent to be able to read a map without it?) >> >> Thanks >> >> Laura >> >> >> >> From: Jody Garnett >> Sent: Monday, February 23, 2009 2:30 AM >> To: Laura >> Cc: [email protected] >> Subject: Re: [udig-users] Reprojection >> >> >> On Mon, Feb 23, 2009 at 8:40 AM, Laura <[email protected]> wrote: >>> >>> Thank you ahmet, >>> >>> but I would like to do everything using udig, if it is possible. I am very >>> new to udig and I am learning the basics. >> >> Welcome :-) >>> >>> Reading the "help contents" I understood this: >>> --- if I use a shape file with epsg code 26591 (Rome/Monte Mario_zone 1) >>> and I set in the map editor the crs with epsg code 26591 , then I see my map >>> in the Rome/Monte Mario_zone 1 CRS >>> --- if I use a shape file with epsg code 26591 and I set in the map editor >>> the crs with epsg code 23032, then the shape file is re-projected and I see >>> my map in a crs with epsg code 23032 >>> --- if I use two different shapefiles with different epgs codes and in the >>> map editor I use another epgs code , then the both of the are reprojected. >>> >>> Is this correct? >> >> Correct. uDig will do its best to show you your data on the current map. If >> the prj information is correct it should be able to handle a wide range of >> situtations. When you go to export out a shapefile (see walkthorugh 1) you >> can export it out in a different projection; it will transform the contents >> as needed producing a new shapefile with a different projection. >> >>> >>> >>> If I use the shapefiles from the Lombardia's website: >>> they have the epsg code 26591 >> >> Do you have a link? I am not sure I have worked with EPSG 26591 before? >>> >>> I set in the map editor the epsg code 26591 >> >> Okay; but did the shapefile include a prj file? does it match the definition >> supplied by uDig for 26591? If not copy the uDig definition for 26591 into >> a prj file for your shapefile and try again. >> >> >>> I should see a rectangle, but I see a rectangle rotated of 30degrees! >>> (I'd'like to show you a picture but I cannot attach it in the mailing list) >> >> If you create a JIRA bug report you can attach a screen snap; however I am >> thinking your shapefile does not include a PRJ file and what you are seeing >> is uDig guessing and just showing you the raw data? >>> >>> >>> If I load the same file in GloboExplorer and in Arcexplorer (sorry) I see >>> a rectangle that is not rotated! And moreover, both Globo and Arcexplorer >>> for a specified point give the same X,Y, and udig gives a different value of >>> x,y! >> >> see the link in your previous email; pleaes advise about the prj file and >> if needed I can download some sample data myself. >> Jody >> >>> >>> >>> So, I do not understand if I misunderstood the help contents or if there's >>> something wrong with roma montemario zone 1 crs... >>> >>> Thanks a lot >>> >>> laura >> >> >>> >>> >>> >>> -------------------------------------------------- >>> From: "ahmet cizmeli" <[email protected]> >>> Sent: Sunday, February 22, 2009 5:28 PM >>> To: "Laura" <[email protected]> >>> Subject: Re: [udig-users] Reprojection >>> >>>> It is definitely possible to do that in udig but I like to use the >>>> command line utility ogr2ogr. Changing the projection of a shapefile using >>>> ogr2ogr : >>>> >>>> Download and install ogr/gdal. >>>> >>>> To create output.shp with the WGS84 (4326) projection, use the following >>>> syntax : >>>> >>>> ogr2ogr output.shp -t_srs "EPSG:4326" input.shp >>>> >>>> you can replace the 4326 with your CRS code of interest. >>>> >>>> voilà >>>> good luck >>>> >>>> >>>> Laura wrote: >>>>> >>>>> Hi, >>>>> I am using a vector layer that I downloaded form the Lombardia website >>>>> (http://www.cartografia.regione.lombardia.it/geoportale/ptk). >>>>> These maps have a Roma40/ovest CRS (MonteMario_Italy_1, epgs code >>>>> 29032). Is there a way to convert their coordinates to UTM-ED50 using udig >>>>> or another open-software? >>>>> Thank a lot >>>>> laura >>>>> ------------------------------------------------------------------------ >>>>> >>>>> _______________________________________________ >>>>> udig-users mailing list >>>>> [email protected] >>>>> http://lists.refractions.net/mailman/listinfo/udig-users >>>>> >>>> >>>> >>> _______________________________________________ >>> udig-users mailing list >>> [email protected] >>> http://lists.refractions.net/mailman/listinfo/udig-users >> >> > _______________________________________________ User-friendly Desktop Internet GIS (uDig) http://udig.refractions.net http://lists.refractions.net/mailman/listinfo/udig-devel
