Generates graphical maps of circular genomes that show sequence features, base composition plots, analysis results and sequence similarity plots. CGView can supply the sequences in different format (raw, FASTA, GenBank or EMBL). BLAST is used by the server to compare the sequence sets. Then, the results are converted in a graphical map which shows all the sequence. The web tool includes different options to control which types of features are displayed and how the features are drawn. The server can be used to aid in the identification of conserved or diverged genome segments, instances of horizontal gene transfer, and differences in gene copy number.