The urgent need to lower carbon emissions makes speeding up development of the UK's renewable energy resources a major priority. But long before any renewable energy technology is installed, basic questions need answering to assess whether a site is potentially suitable, saving money from being wasted on sites with poor resource potential or serious constraints.

D4S helps stakeholders (e.g. landowners, surveyors) to answer questions such as:

• Which renewable energy technologies have high resources potential at the site?
• What are the potential constraints, whether technical or political, on renewable energy at the site?
• Do those constraints prevent development or can they be overcome?
• Given these constraints, would another renewable energy technology produce better results instead?

D4S is a web-mapping service that uses multiple sources of environmental data to map resources and constraints. These data are then used to map the overall feasibility for many renewable technologies.

Renewable energy vendors can target areas where their technology is more likely to be feasible. Stakeholders can assess their sites for a range of renewable energy technologies in order to dismiss unfeasible options and prioritise further work on the most feasible technologies, thus saving both resources and time.