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?










share|improve this question





























    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?










    share|improve this question



























      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?










      share|improve this question















      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















      share|improve this question













      share|improve this question




      share|improve this question








      edited Dec 28 '18 at 8:07









      Erik

      2,830118




      2,830118










      asked Dec 28 '18 at 7:32









      şener alkan

      61




      61






















          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
            Dec 28 '18 at 8:51










          • Could you accept my answer clicking on the up arrow beside my answer?
            – Zoltan
            Dec 28 '18 at 10:48



















          1














          Run the drop z values algorithm from the QGIS processing toolbox






          share|improve this answer























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            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
              Dec 28 '18 at 8:51










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              Dec 28 '18 at 10:48
















            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
              Dec 28 '18 at 8:51










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              Dec 28 '18 at 10:48














            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 Dec 28 '18 at 8:09









            Zoltan

            3,027716




            3,027716












            • It's working, Thanks for your answer
              – şener alkan
              Dec 28 '18 at 8:51










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              Dec 28 '18 at 10:48


















            • It's working, Thanks for your answer
              – şener alkan
              Dec 28 '18 at 8:51










            • Could you accept my answer clicking on the up arrow beside my answer?
              – Zoltan
              Dec 28 '18 at 10:48
















            It's working, Thanks for your answer
            – şener alkan
            Dec 28 '18 at 8:51




            It's working, Thanks for your answer
            – şener alkan
            Dec 28 '18 at 8:51












            Could you accept my answer clicking on the up arrow beside my answer?
            – Zoltan
            Dec 28 '18 at 10:48




            Could you accept my answer clicking on the up arrow beside my answer?
            – Zoltan
            Dec 28 '18 at 10:48













            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 Dec 28 '18 at 8:39









                Erik

                2,830118




                2,830118










                answered Dec 28 '18 at 8:10









                ndawson

                18.2k22640




                18.2k22640






























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