Making grids in QGIS












3















In QGIS I am trying to make a map with the Maidenhead Locator System overlayed. I am making these overlays with QGIS's create grid tool but the grids are not coming out right.



If I leave the map unprojected the bigger and smaller grid lines are parallel but any projection I use they are not parallel. Does anybody know how to fix this?



Picture_of_error










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    3















    In QGIS I am trying to make a map with the Maidenhead Locator System overlayed. I am making these overlays with QGIS's create grid tool but the grids are not coming out right.



    If I leave the map unprojected the bigger and smaller grid lines are parallel but any projection I use they are not parallel. Does anybody know how to fix this?



    Picture_of_error










    share|improve this question



























      3












      3








      3


      2






      In QGIS I am trying to make a map with the Maidenhead Locator System overlayed. I am making these overlays with QGIS's create grid tool but the grids are not coming out right.



      If I leave the map unprojected the bigger and smaller grid lines are parallel but any projection I use they are not parallel. Does anybody know how to fix this?



      Picture_of_error










      share|improve this question
















      In QGIS I am trying to make a map with the Maidenhead Locator System overlayed. I am making these overlays with QGIS's create grid tool but the grids are not coming out right.



      If I leave the map unprojected the bigger and smaller grid lines are parallel but any projection I use they are not parallel. Does anybody know how to fix this?



      Picture_of_error







      qgis grids-graticules






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      share|improve this question













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      edited yesterday









      Taras

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      asked yesterday









      jake9wijake9wi

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      283






















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          The grid creator makes very simple lines with vertices only on each end. You'll need to 'densify' the geometry (adding extra vertices) so that intermediate points can be projected and define the shape of the lines correctly.



          For example, here's an unprojected map with a default grid from QGIS (5° intervals):





          If we change the projection (Aitoff 54043), the lines still render straight but clearly the shape of Africa has changed:





          Using the 'densify by count' tool from processing and adding 50 vertices per line, we get a new grid that seems to curve correctly:





          Editing the vertices of one line of the densified geometry shows how many points define the shape along the way:








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            1 Answer
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            active

            oldest

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            active

            oldest

            votes






            active

            oldest

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            6














            The grid creator makes very simple lines with vertices only on each end. You'll need to 'densify' the geometry (adding extra vertices) so that intermediate points can be projected and define the shape of the lines correctly.



            For example, here's an unprojected map with a default grid from QGIS (5° intervals):





            If we change the projection (Aitoff 54043), the lines still render straight but clearly the shape of Africa has changed:





            Using the 'densify by count' tool from processing and adding 50 vertices per line, we get a new grid that seems to curve correctly:





            Editing the vertices of one line of the densified geometry shows how many points define the shape along the way:








            share|improve this answer




























              6














              The grid creator makes very simple lines with vertices only on each end. You'll need to 'densify' the geometry (adding extra vertices) so that intermediate points can be projected and define the shape of the lines correctly.



              For example, here's an unprojected map with a default grid from QGIS (5° intervals):





              If we change the projection (Aitoff 54043), the lines still render straight but clearly the shape of Africa has changed:





              Using the 'densify by count' tool from processing and adding 50 vertices per line, we get a new grid that seems to curve correctly:





              Editing the vertices of one line of the densified geometry shows how many points define the shape along the way:








              share|improve this answer


























                6












                6








                6







                The grid creator makes very simple lines with vertices only on each end. You'll need to 'densify' the geometry (adding extra vertices) so that intermediate points can be projected and define the shape of the lines correctly.



                For example, here's an unprojected map with a default grid from QGIS (5° intervals):





                If we change the projection (Aitoff 54043), the lines still render straight but clearly the shape of Africa has changed:





                Using the 'densify by count' tool from processing and adding 50 vertices per line, we get a new grid that seems to curve correctly:





                Editing the vertices of one line of the densified geometry shows how many points define the shape along the way:








                share|improve this answer













                The grid creator makes very simple lines with vertices only on each end. You'll need to 'densify' the geometry (adding extra vertices) so that intermediate points can be projected and define the shape of the lines correctly.



                For example, here's an unprojected map with a default grid from QGIS (5° intervals):





                If we change the projection (Aitoff 54043), the lines still render straight but clearly the shape of Africa has changed:





                Using the 'densify by count' tool from processing and adding 50 vertices per line, we get a new grid that seems to curve correctly:





                Editing the vertices of one line of the densified geometry shows how many points define the shape along the way:









                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered yesterday









                SimbamanguSimbamangu

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