Four classic genome maps generated from the Human Genome Project
| Map type | Main technique | Unit | Illustration |
| Linkage map59 | Pedigree analysis | cM | Figure 1A |
| Transcription map60 | Reverse transcription+sequencing | EST | Figure 1B |
| Physical map61 | Restriction mapping+overlapped clone groups | kb or Mb | Figure 1C |
| Sequence map62 | Sequencing | base | Figure 1D |
EST, expressed sequence tag.