Guidelines on NWRD Spatial Data Quality.

The National Water Resources Database (NWRD) aimed to maintain the sustainable integrated GIS based database that would consolidate all previously collected data on environment and water resources. The purpose of this Document is mainly to construct a guideline on spatial data quality to adapt in the development of NWRD. The specific objectives of this Document are: 1.To develop the spatial data quality standards; 2.To formulating data quality management guideline for sustainable NWRD; 3. To develop of standard format of data quality reporting. 4. To develop product specification for producing new and update data layers of NWRD in near future and as well as other organizations.
The guidelines are established in the two main areas: 1. quality management standards; 2. quality management for spatial data. The quality management would include: Identification of sources of spatial data discrepancy; Preparation of product specification; Quality management of spatial data production; Quality assessment and validation; Quality control of data collected and incorporated from secondary sources; Quality documentation; Database management and data quality.