The 2012 land use/land cover data set was displayed over 2015 CIR digital imagery. New line work and codes needed to describe the land use conditions interpreted from the 2015 imagery were added directly to the 2012 layer through interactive editing. Photo-interpretation, interactive editing, field surveys and initial QA/QC done by Aerial Information Systems, Redlands, CA, under the direction of the NJDEP/BGIS. The baseline 2015 data sets edited in this project were prepared by NJDEP/BGIS, from the original 2012 Land Use/Land Cover Update layers. The original layers included both 2015 and 2012 land use codes and linework. The 2012 codes and linework were removed by dissolving on the critical 2012 land use attributes. This produced layers that included only the 2012 codes and linework. It was these dissolved layers that were edited in this present project . Final QA/QC and final data set formatting for the 2012 update layers was done by NJDEP/BGIS. Land use/land cover in 2015 was captured by adding additional line work and codes to the base layer, and filling in specific attribute fields that describe the 2012 land use/land cover ground conditions. All 2012 codes and line work remain in the data set so that change analysis can be performed on all polygons using this one updated data set. The 2012 polygons and codes were updated if it was felt that original mapped lines or land use classifications of any 2012 polygon needed to be modified based on the better 2012 imagery. In addition to the lu/lc codes, an impervious surface estimate was made for every polygon. This was a visual estimate and not a measured value. Data sets were processed and delivered by USGS Subbasin (HU8).