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Do I have to reproject the coordinate system when two layers overlap already?


Quantum GIS Reproject a projected coordinate system with rotationLayers with same coordinate system should align/overlap in ArcMap but do not?How to reproject arbitrary coordinate system grid to OSGB using FME?If I've given two different layers the same CRS, why won't they overlay one another?Layers with the same Geographic Coordinate system don't overlapAdding Geographic Coordinate System and Projected Coordinate System layersLayers with the same projected coordinate system and geographic coordinate system do not overlapSame coordinate system - shapefiles don't overlapCan percent overlap of polygon layers be calculated in geographic coordinate system?Creating buffers around locations when using a Geographic Coordinate System













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Hi I am new to QGIS and have some questions about the coordinate system.
I have two layers in QGIS, one the coordinate system of WGS84 and another uses GRS80. The two layers overlap, which looks good. My question is do I have to reproject them to the same coordinate system or just leave them as they are? Someone told me that reprojection could introduce inaccuracies to the data. So does it matter if I don't reproject? Under what situations is the reprojection needed?



Thanks.









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    Hi I am new to QGIS and have some questions about the coordinate system.
    I have two layers in QGIS, one the coordinate system of WGS84 and another uses GRS80. The two layers overlap, which looks good. My question is do I have to reproject them to the same coordinate system or just leave them as they are? Someone told me that reprojection could introduce inaccuracies to the data. So does it matter if I don't reproject? Under what situations is the reprojection needed?



    Thanks.









    share







    New contributor




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























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      0








      Hi I am new to QGIS and have some questions about the coordinate system.
      I have two layers in QGIS, one the coordinate system of WGS84 and another uses GRS80. The two layers overlap, which looks good. My question is do I have to reproject them to the same coordinate system or just leave them as they are? Someone told me that reprojection could introduce inaccuracies to the data. So does it matter if I don't reproject? Under what situations is the reprojection needed?



      Thanks.









      share







      New contributor




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












      Hi I am new to QGIS and have some questions about the coordinate system.
      I have two layers in QGIS, one the coordinate system of WGS84 and another uses GRS80. The two layers overlap, which looks good. My question is do I have to reproject them to the same coordinate system or just leave them as they are? Someone told me that reprojection could introduce inaccuracies to the data. So does it matter if I don't reproject? Under what situations is the reprojection needed?



      Thanks.







      qgis coordinate-system





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










      share







      New contributor




      Summer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share






      New contributor




      Summer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      SummerSummer

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      Summer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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