Please see the list below for places to download GIS data for Delaware and beyond.
ArcGIS Living Atlas
A global collection of GIS data as well as maps and apps, also accessible through ArcGIS Pro.
The National Map
National spatial data for the United States, including imagery, elevation, hydrography, and more.
U.S. Census Bureau TIGER/Line
Includes census spatial units as well as political boundaries, roads, landmarks, and other features.
National Land Cover Dataset (NLCD)
Includes 16 land cover classes at 30m resolution for the United States, updated every few years.
Chesapeake Bay Program Land Cover and Land Use/Land Cover Datasets
Includes 13 land cover and 54 land use classes at 1m resolution for the Chesapeake Bay watershed for 2013/2014 and 2017/2018.
https://www.sciencebase.gov/catalog/item/633302d8d34e900e86c61f81
Cropland Data Layer (CDL)
Annual cropland cover and crop type data for the conterminous United States.