Replacing data in raster using condition?











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1
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I have a raster dataset in ArcGIS displaying altitude.



I want to replace all values < 8 with value 8.



Other values have to stay the same. How can I do this?



I tried raster calculator, but I don't seem to get the expression right.










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Anne is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    up vote
    1
    down vote

    favorite












    I have a raster dataset in ArcGIS displaying altitude.



    I want to replace all values < 8 with value 8.



    Other values have to stay the same. How can I do this?



    I tried raster calculator, but I don't seem to get the expression right.










    share|improve this question









    New contributor




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






















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I have a raster dataset in ArcGIS displaying altitude.



      I want to replace all values < 8 with value 8.



      Other values have to stay the same. How can I do this?



      I tried raster calculator, but I don't seem to get the expression right.










      share|improve this question









      New contributor




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











      I have a raster dataset in ArcGIS displaying altitude.



      I want to replace all values < 8 with value 8.



      Other values have to stay the same. How can I do this?



      I tried raster calculator, but I don't seem to get the expression right.







      arcgis-desktop spatial-analyst raster-calculator replace






      share|improve this question









      New contributor




      Anne 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




      Anne 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 Nov 28 at 11:17









      PolyGeo

      52.9k1779237




      52.9k1779237






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      asked Nov 28 at 10:50









      Anne

      83




      83




      New contributor




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      New contributor





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






      Anne 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

















          up vote
          2
          down vote



          accepted










          With the raster calculator, you can use the Con() statement(condiotion, value if true, value if false)



          Con("raster" < 8 , 8, "raster")





          share|improve this answer





















          • It worked. Thank you very much.
            – Anne
            Nov 28 at 11:20


















          up vote
          1
          down vote













          # Import system modules   
          import arcpy
          from arcpy import env
          from arcpy.sa import *

          # Set environment settings
          env.workspace = "C:/project/input/data"

          # Execute Con
          outCon = Con("altitude" < 8, 8, "altitude")

          # Save the outputs
          outCon.save("C:/project/output/output.img")


          References:




          • Tools > Tool reference > Spatial Analyst toolbox > Conditional toolset > Con

          • Using Con in Raster Calculator of ArcGIS for Desktop? [closed]

          • How to use OR in a CON statement, in the ArcGIS Raster Calculator?






          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








            up vote
            2
            down vote



            accepted










            With the raster calculator, you can use the Con() statement(condiotion, value if true, value if false)



            Con("raster" < 8 , 8, "raster")





            share|improve this answer





















            • It worked. Thank you very much.
              – Anne
              Nov 28 at 11:20















            up vote
            2
            down vote



            accepted










            With the raster calculator, you can use the Con() statement(condiotion, value if true, value if false)



            Con("raster" < 8 , 8, "raster")





            share|improve this answer





















            • It worked. Thank you very much.
              – Anne
              Nov 28 at 11:20













            up vote
            2
            down vote



            accepted







            up vote
            2
            down vote



            accepted






            With the raster calculator, you can use the Con() statement(condiotion, value if true, value if false)



            Con("raster" < 8 , 8, "raster")





            share|improve this answer












            With the raster calculator, you can use the Con() statement(condiotion, value if true, value if false)



            Con("raster" < 8 , 8, "raster")






            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Nov 28 at 10:58









            radouxju

            39.3k139112




            39.3k139112












            • It worked. Thank you very much.
              – Anne
              Nov 28 at 11:20


















            • It worked. Thank you very much.
              – Anne
              Nov 28 at 11:20
















            It worked. Thank you very much.
            – Anne
            Nov 28 at 11:20




            It worked. Thank you very much.
            – Anne
            Nov 28 at 11:20












            up vote
            1
            down vote













            # Import system modules   
            import arcpy
            from arcpy import env
            from arcpy.sa import *

            # Set environment settings
            env.workspace = "C:/project/input/data"

            # Execute Con
            outCon = Con("altitude" < 8, 8, "altitude")

            # Save the outputs
            outCon.save("C:/project/output/output.img")


            References:




            • Tools > Tool reference > Spatial Analyst toolbox > Conditional toolset > Con

            • Using Con in Raster Calculator of ArcGIS for Desktop? [closed]

            • How to use OR in a CON statement, in the ArcGIS Raster Calculator?






            share|improve this answer



























              up vote
              1
              down vote













              # Import system modules   
              import arcpy
              from arcpy import env
              from arcpy.sa import *

              # Set environment settings
              env.workspace = "C:/project/input/data"

              # Execute Con
              outCon = Con("altitude" < 8, 8, "altitude")

              # Save the outputs
              outCon.save("C:/project/output/output.img")


              References:




              • Tools > Tool reference > Spatial Analyst toolbox > Conditional toolset > Con

              • Using Con in Raster Calculator of ArcGIS for Desktop? [closed]

              • How to use OR in a CON statement, in the ArcGIS Raster Calculator?






              share|improve this answer

























                up vote
                1
                down vote










                up vote
                1
                down vote









                # Import system modules   
                import arcpy
                from arcpy import env
                from arcpy.sa import *

                # Set environment settings
                env.workspace = "C:/project/input/data"

                # Execute Con
                outCon = Con("altitude" < 8, 8, "altitude")

                # Save the outputs
                outCon.save("C:/project/output/output.img")


                References:




                • Tools > Tool reference > Spatial Analyst toolbox > Conditional toolset > Con

                • Using Con in Raster Calculator of ArcGIS for Desktop? [closed]

                • How to use OR in a CON statement, in the ArcGIS Raster Calculator?






                share|improve this answer














                # Import system modules   
                import arcpy
                from arcpy import env
                from arcpy.sa import *

                # Set environment settings
                env.workspace = "C:/project/input/data"

                # Execute Con
                outCon = Con("altitude" < 8, 8, "altitude")

                # Save the outputs
                outCon.save("C:/project/output/output.img")


                References:




                • Tools > Tool reference > Spatial Analyst toolbox > Conditional toolset > Con

                • Using Con in Raster Calculator of ArcGIS for Desktop? [closed]

                • How to use OR in a CON statement, in the ArcGIS Raster Calculator?







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Nov 28 at 11:22

























                answered Nov 28 at 11:17









                Taras

                1,5902522




                1,5902522






















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