The expertise and accuracy of our geographical information systems services precludes nearly all potential problems associated with GIS maps. Some projects are hampered by coordinate problems of different image and vector data layers, which are caused by one or a combination of the following

• Improper orthorectification of satellite imagery
• Poor quality GPS derived ground control points (GCPs)
• Improper rectification of digital source raster maps
• Importation of vector data or shape files for source data with incorrect coordinates
• Improper use of units or unit convergence factors for source data
• Utilization of source data from a corrupt coordinate database

One of the primary services provided by SIC during the implementation of a GIS project is the geo referencing of various GIS data layers for mapping projection. SIC has developed comprehensive policy and procedures to include QA and QC in the planning stage of every project involving the use of satellite image data for geographical information systems mapping.