SolVES is a tool for modeling and mapping social survey response data in relation to explanatory environmental variables. SolVES 4.0 was developed as open-source software with Python and uses the free software packages QGIS for its user interface and PostgreSQL spatially enabled by PostGIS for its source database. Updates to the previous version include minor changes to the source database and user interface provide users with additional information about each social-value model and reduce the number of required user inputs. The Analyze Survey Data and Transfer Values tools are now directly accessible from the project setup screen. The addition of a table to the source database allows users to indicate that environmental data are either continuous or categorical, eliminating the need to identify the data type at run time. Environmental data included in social-value models used for value transfer are automatically identified at run time. The final map layout has been redesigned to increase the number of environmental data graphs that can be viewed and to provide the average nearest neighbor and maximum-value index statistics associated with each social-value model. An additional map background option using OpenStreetMap allows users to include additional reference information on their social-value maps.