How can I solve this problem?
Example:In feature class A there is a column called 'temperature_2010' This column has 200000 values.
In feature class B there is a column called 'temperature_1970' It has 200000 values too.
How can I subtract 'temperature_1970' from 'temperature_2010'? I know how to do this when the columns are in the same attribut table. But how can I manage it when the columns are in different attribut tables?
أكثر...
Example:In feature class A there is a column called 'temperature_2010' This column has 200000 values.
In feature class B there is a column called 'temperature_1970' It has 200000 values too.
How can I subtract 'temperature_1970' from 'temperature_2010'? I know how to do this when the columns are in the same attribut table. But how can I manage it when the columns are in different attribut tables?
أكثر...