Preparing data
Datavisualisation, a data mining and exploration tool

It's an illusion to think that the data found in the various sources will be ready to use.

The analyst will have to apply several successive processes:

• control of aberrations and extremes with possible suppression ;

• data homogenization where possible (e.g., for numerical data to be converted or names to be standardized); see figure "Example of Open Refine's name homogenization processing". Open Refine is a tool that enables data to be reprocessed, standardized or deduplicated;

• data structuring, for example using segmentation solutions (Web scrapping) or extraction of named entities;

• data exploitation (statistical processing, spatialization,...