These are LARGE files! Please use the Interacive Select Mode with a Download Manager if you will be downloading more than a few files. UPDATED December 2017.
Metadata Correction: The xml file included in download of GeoTiff, MrSID3 and MrSID4 imagery is an outdated version. Details here.
Aerial imagery is available by tile in three formats (GeoTIff, MrSID3 and MrSID4) and by town mosaic in two formats (MrSID3 and MrSID4).
Elevation downloadbale here as raster DEM (tif) tiles, LAS point cloud tiles. Contour geodatabase download here.