DSS can parse ESRI shapefiles. You can either use a folder containing all the required files, or a .shp.zip
Shapefiles can contain data in a very large number of projections. Some projections require advanced math to parse. This capability is provided by a library called Vecmath. Vecmath is also required for some projections handling in data preparation
Vecmath is a GPL library. For licensing reasons, DSS is not provided with Vecmath. To open some Shapefiles, you need to download and install Vecmath manually. Please install vecmath-1.3.1.jar or later.
Download it from MVN repository and review the licensing terms: https://mvnrepository.com/artifact/javax.vecmath/vecmath/1.5.2
Put the downloaded jar in DSS_DATA_DIR/lib/jdbc
You should now be able to read all Shapefiles.