There has been a lot of interest in using LiDAR for solar mapping. This would be the mapping for placement of solar panels. The slope and aspect of roofs need to be determined in relationship of sun angles at a given location. Recently, New York City conducted a solar mapping project using LiDAR. In addition to solar mapping the data will be used for several other applications. Typically, solar mapping LiDAR projects require a much more dense data set. NYC specified a minumum of 12 points per meter. It is my feeling that a less dense data set would work, maybe 4 points per meter. If anyone has more information on this application or general comments please let me know.