  The meaning and purposes of web has been changing and evolving day by day.
Web 2. 0 encouraged more contribution by the end users. This movement provided
revolutionary methods of sharing and computing data by crowdsourcing such as
OpenStreetmap, also called "the wikification of maps" by some researchers. When
crowdsourcing collects huge data with help of general public with varying level
of mapping experience, the focus of researcher should be on analysing the data
rather than collecting it. Researchers have assessed the quality of
OpenStreetMap data by comparing it with proprietary data or data of
governmental map agencies. This study reviews the research work for assessment
of Open- StreetMap Data and also discusses about the future directions.
