Earlier this week we added nearly 10 terabytes of new Wisconsin aerial imagery to the WisconsinView raster data archive. Anyone interested can discover and download the imagery via the GeoData@Wisconsin geoportal. Additions include products from the 2020 National Agriculture Imagery Program (NAIP), and public-domain imagery collected through the 2018-2020 Wisconsin Regional Orthoimagery Consortium (WROC) program.
The U.S. Department of Agriculture 2020 program covered the entire state with summertime (leaf-on) imagery having a 0.6-meter spatial resolution. Collected in four spectral bands (R,G,B, IR), products include Digital Orthophoto Quarter-Quad tiles in GeoTiff format (referenced to both WTM and UTM coordinate systems), and MrSID-format mosaics tiled by county. Mosaic options include natural color referenced to UTM or WTM, and color infrared referenced to UTM. A DOQQ tile index shapefile is also available for users who want to construct mosaics for their own specific area of interest.
Thanks to financial contributions from a variety of state and federal partners that supplemented county and Wisconsin Land Information Program funding, the 2020 WROC program produced statewide 12-inch products that are considered public domain. Two options are available: MrSID county mosaics referenced to WTM, and individual Digital Orthophoto Quarter-Quad tiles in GeoTiff format. Unlike the NAIP products, the springtime (leaf-off) WROC imagery collects spanned three years from 2018 to 2020. A DOQQ tile index shapefile is also available.
It Takes a Team
The UW-Madison Space Science and Engineering Center hosts the massive WisconsinView raster data archive, while GeoData@Wisconsin serves as the front door for users to discover and download both aerial imagery and LiDAR-derived elevation products. Special thanks to the Wisconsin Department of Natural Resources for providing the 2020 NAIP mosaics referenced to the Wisconsin Transverse Mercator coordinate system, and sharing over 7TB of public-domain WROC data.
GeoData@Wisconsin is an online geoportal that provides discovery and access to Wisconsin geospatial data, imagery, and scanned maps. It is developed and maintained by the Robinson Map Library and State Cartographer’s Office, both at UW-Madison. The geoportal combines a map-based spatial search with traditional keyword searching and faceted browsing options to locate and download Wisconsin geospatial data.