For each of the following data sets, tell us who produces them, what are the source materials, what do the data sets contain, their grain sizes and accuracies, and how they are delivered: digital raster graphics (DRGs)
digital line graphs (DLGs)
digital elevation models (DEMs)
digital orthophotoquads (DOQs)
digital floodplain data
National Wetlands Inventory data (NWI)
SSURGO and STATSGO soils data
TIGER census data
national land cover data (NLCD)

What is domain name system (dns)? allows dynamic ip address allocation so users do not have to have a preconfigured ip address to use the network converts ip addresses into domains, or identifying labels that use a variety of recognizable naming conventions the efficient coexistence of telephone, video, and data communication within a single network, offering convenience and flexibility not possible with separate infrastructures the integration of communication channels into a single service