Socioeconomic criteria raster maps of spatial impact assessment of highway broadening in Sikkim Himalaya. The maps were generated by GPS tagged responses of participants from the project affected population in a buffer area of 2 km radius from the highway. A structured questionnaire was administered to the participants and their residential location was tabulated using GPS handset. The responses of 100 respondents were aggregated into several townships along the highway using k-nearest neighbor mean calculation. The database was projected in the ArcGIS environment and Empirical Bayesian Kriging was used to prepare the rasters.