docs: @Override
      public ElevationProvider setBaseURL(String baseURL) {
          String[] urls = baseURL.split(";");
          if (urls.length != 2) {
              throw new IllegalArgumentException("The base url must consist of two urls separated by a ';'. The first for cgiar, the second for gmted");
          }
          srtmProvider.setBaseURL(urls[0]);
          globalProvider.setBaseURL(urls[1]);
          return this;
      }