The Index of multiple deprivation (IMD) combines information from the English Indices of deprivation (IoD). It is the Government's official measure of relative deprivation for LSOAs (Lower layer super output areas). LSOAs are small geographical areas of approximately 1,700 people. There are 128 LSOAs in Calderdale. The IoD is a set of relative measures of deprivation for LSOAs across England, based on seven different domains of deprivat...