**1.4.2.2 Railway spatial data quality control standards**

At present spatial data in each business system of Ministry of Railway independently purchase and make. Because different systems have different requirements of spatial data, in addition to the implementation time of each business systems are not same, leading to spatial data quality irregularity of each department. In construction of Digital Railway, must accord with corresponding national standards and industry standards of spatial data, while take strictly control for spatial data quality to ensure the validity and public of spatial data in storage.
