case '+':
                case '-':
                case '.':
                case '0':
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
                case ':':
                case 'A':
                case 'B':
                case 'C':
                case 'D':
                case 'E':
                case 'F':
                case 'G':
                case 'H':
                case 'I':
                case 'J':
                case 'K':
                case 'L':
                case 'M':
                case 'N':
                case 'O':
                case 'P':
                case 'Q':
                case 'R':
                case 'S':
                case 'T':
                case 'U':
                case 'V':
                case 'W':
                case 'X':
                case 'Y':
                case 'Z':
                case 'a':
                case 'b':
                case 'c':
                case 'd':
                case 'e':
                case 'f':
                case 'g':
                case 'h':
                case 'i':
                case 'j':
                case 'k':
                case 'l':
                case 'm':
                case 'n':
                case 'o':
                case 'p':
                case 'q':
                case 'r':
                case 's':
                case 't':
                case 'u':
                case 'v':
                case 'w':
                case 'x':
                case 'y':
                case 'z':
                    {

        } else {

            if ( !crs.equals( WGS84 ) ) {
                // transform the bounding box of the request to EPSG:4326
                GeometryTransformer trans = new GeometryTransformer( WGS84 );
                try {
                    bbox = trans.transform( bbox, crs );
                } catch ( IllegalArgumentException e ) {
                    LOG.error( "Unknown error", e );
                } catch ( TransformationException e ) {
                    LOG.error( "Unknown error", e );
                }
            }
            double dx = bbox.getSpan0() / mapWidth;
            double dy = bbox.getSpan1() / mapHeight;
            double minx = bbox.getMin().get0() + dx * ( mapWidth / 2d - 1 );
            double miny = bbox.getMin().get1() + dy * ( mapHeight / 2d - 1 );
            double maxx = bbox.getMin().get0() + dx * ( mapWidth / 2d );
            double maxy = bbox.getMin().get1() + dy * ( mapHeight / 2d );