How to convert MultiLineStringZ object to MultilineString object?












1














I have CAD-data which I transformed to shapefiles. Currently after the transformation the objects still have a Z value which is useless to me.



My question is: How do I convert a MultiLineStringZ-object to a MultiLineString-object?






qgis postgis postgresql







share|improve this question









New contributor




şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

























    1














    I have CAD-data which I transformed to shapefiles. Currently after the transformation the objects still have a Z value which is useless to me.



    My question is: How do I convert a MultiLineStringZ-object to a MultiLineString-object?






    qgis postgis postgresql







    share|improve this question









    New contributor




    şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      1












      1








      1







      I have CAD-data which I transformed to shapefiles. Currently after the transformation the objects still have a Z value which is useless to me.



      My question is: How do I convert a MultiLineStringZ-object to a MultiLineString-object?






      qgis postgis postgresql







      share|improve this question









      New contributor




      şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I have CAD-data which I transformed to shapefiles. Currently after the transformation the objects still have a Z value which is useless to me.



      My question is: How do I convert a MultiLineStringZ-object to a MultiLineString-object?






      qgis postgis postgresql




      qgis postgis postgresql






      share|improve this question









      New contributor




      şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









      New contributor




      şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question








      edited 5 hours ago









      Erik

      2,812118




      2,812118






      New contributor




      şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 5 hours ago









      şener alkan

      61




      61




      New contributor




      şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      şener alkan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






















          2 Answers
          2






          active

          oldest

          votes


















          1














          There is a ST_Force2d function in PostGIS which does the job. A new table should be created with 2D geometry and use an insert statement with select to populate the new table:



          insert into new_table (geom, col1, col2, col3) 
          
select ST_Force2D(geom), col1, col2, col2 from old_table;


          You should substitute your real column names into col1, col2, ...
          You can query the table structure with in psql



          d old_table


          or you can use pgadmin with GUI.






          share|improve this answer





















          • It's working, Thanks for your answer
            – şener alkan
            4 hours ago










          • Could you accept my answer clicking on the up arrow beside my answer?
            – Zoltan
            2 hours ago



















          1














          Run the drop z values algorithm from the QGIS processing toolbox






          share|improve this answer























            Your Answer








            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "79"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            autoActivateHeartbeat: false,
            convertImagesToLinks: false,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: null,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });






            şener alkan is a new contributor. Be nice, and check out our Code of Conduct.










            draft saved

            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fgis.stackexchange.com%2fquestions%2f307135%2fhow-to-convert-multilinestringz-object-to-multilinestring-object%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            1














            There is a ST_Force2d function in PostGIS which does the job. A new table should be created with 2D geometry and use an insert statement with select to populate the new table:



            insert into new_table (geom, col1, col2, col3) 
            
select ST_Force2D(geom), col1, col2, col2 from old_table;


            You should substitute your real column names into col1, col2, ...
            You can query the table structure with in psql



            d old_table


            or you can use pgadmin with GUI.






            share|improve this answer





















            • It's working, Thanks for your answer
              – şener alkan
              4 hours ago










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              2 hours ago
















            1














            There is a ST_Force2d function in PostGIS which does the job. A new table should be created with 2D geometry and use an insert statement with select to populate the new table:



            insert into new_table (geom, col1, col2, col3) 
            
select ST_Force2D(geom), col1, col2, col2 from old_table;


            You should substitute your real column names into col1, col2, ...
            You can query the table structure with in psql



            d old_table


            or you can use pgadmin with GUI.






            share|improve this answer





















            • It's working, Thanks for your answer
              – şener alkan
              4 hours ago










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              2 hours ago














            1












            1








            1






            There is a ST_Force2d function in PostGIS which does the job. A new table should be created with 2D geometry and use an insert statement with select to populate the new table:



            insert into new_table (geom, col1, col2, col3) 
            
select ST_Force2D(geom), col1, col2, col2 from old_table;


            You should substitute your real column names into col1, col2, ...
            You can query the table structure with in psql



            d old_table


            or you can use pgadmin with GUI.






            share|improve this answer












            There is a ST_Force2d function in PostGIS which does the job. A new table should be created with 2D geometry and use an insert statement with select to populate the new table:



            insert into new_table (geom, col1, col2, col3) 
            
select ST_Force2D(geom), col1, col2, col2 from old_table;


            You should substitute your real column names into col1, col2, ...
            You can query the table structure with in psql



            d old_table


            or you can use pgadmin with GUI.







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 5 hours ago









            Zoltan

            2,997716




            2,997716












            • It's working, Thanks for your answer
              – şener alkan
              4 hours ago










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              2 hours ago


















            • It's working, Thanks for your answer
              – şener alkan
              4 hours ago










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              2 hours ago
















            It's working, Thanks for your answer
            – şener alkan
            4 hours ago




            It's working, Thanks for your answer
            – şener alkan
            4 hours ago












            Could you accept my answer clicking on the up arrow beside my answer?
            – Zoltan
            2 hours ago




            Could you accept my answer clicking on the up arrow beside my answer?
            – Zoltan
            2 hours ago













            1














            Run the drop z values algorithm from the QGIS processing toolbox






            share|improve this answer




























              1














              Run the drop z values algorithm from the QGIS processing toolbox






              share|improve this answer


























                1












                1








                1






                Run the drop z values algorithm from the QGIS processing toolbox






                share|improve this answer














                Run the drop z values algorithm from the QGIS processing toolbox







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 4 hours ago









                Erik

                2,812118




                2,812118










                answered 5 hours ago









                ndawson

                18k22640




                18k22640






















                    şener alkan is a new contributor. Be nice, and check out our Code of Conduct.










                    draft saved

                    draft discarded


















                    şener alkan is a new contributor. Be nice, and check out our Code of Conduct.













                    şener alkan is a new contributor. Be nice, and check out our Code of Conduct.












                    şener alkan is a new contributor. Be nice, and check out our Code of Conduct.
















                    Thanks for contributing an answer to Geographic Information Systems Stack Exchange!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid …



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.





                    Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


                    Please pay close attention to the following guidance:


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid …



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fgis.stackexchange.com%2fquestions%2f307135%2fhow-to-convert-multilinestringz-object-to-multilinestring-object%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    -

                    Popular posts from this blog

                    What visual should I use to simply compare current year value vs last year in Power BI desktop

                    Image
                    0 I have column SubToBind that shows current year ratio and column PY SubToBind which shows previous year ratio. How can I simply create a card that would be displaying them both in a nice way? Something like that: I cannot achieve that with regular card, I also tried Card with States by OKViz but also unable to see both values. In KPI visual - I dont like the word "Goal", it will confuse end users. Are there any cards or other visuals that would do the job? Thanks powerbi dax powerbi-embedded share | improve this question edited Jun 11 '18 at 20:11 Oleg ...
                    Read more

                    How to ignore python UserWarning in pytest?

                    Image
                    up vote 1 down vote favorite I am using openpyxl for parsing .xlsm files, and pytest for testing. When I open a file, I get the: OpenPyxl -> UserWarning: Data Validation extension is not supported and will be removed That is not really a problem bcs. program works and I can't change the .xlsm file to fix that. But... When I run pytest with something like: def test_wrong_file_format(): assert check_excel(open_excel('file.xlsm')) == True I will get the warning i mentioned altought check_excel(open_excel('file.xlsm')) returns True and the test should suceed... Is there a nice way to tell the pytest that "It's not a bug it's a feature" and tests should pass even when they get this warning? Is there other way than using something like: with pytest.warns(UserWarning): ...
                    Read more

                    Alexandru Averescu

                    Image
                    Alexandre Averescu Alexandru Averescu Naissance 3 avril 1859 Babele, Ismail  (ro) près de Izmaïl (principauté de Moldavie) Décès 2 octobre 1938 (à 79 ans) [ 1 ] Bucarest Origine   Roumanie Arme cavalerie Grade Maréchal Années de service 1901-1917 Commandement chef d'état-major général 2 e  armée 3 e  armée Groupe d'armée sud armée du Danube Conflits Guerre russo-turque de 1877-1878 Deuxième guerre balkanique Première Guerre mondiale Faits d'armes Bataille de Turtucaia/Tutrakan Bataille de Mărăști Distinctions Autres fonctions 3 fois président du Conseil des ministres ministre des Affaires étrangères ministre sans portefeuille conseiller de la Couronne modifier   Alexandre Averescu (en roumain : Alexandru Averescu .mw-parser-output .prononciation>a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Loudspeaker.svg/11px-Loudspeaker.svg.png")center ...
                    Read more