This resource visualizes changes in the electrical networks of 220 kV and above of the Moscow power system. Using the time slider, you can see what the network looked like in each particular year since the first 220 kV power lines were constructed. The visualized data is the product of many years of research on archival maps, schemes, documents, aerial and satellite images. In addition to displaying the network status for a certain year, visualization of topomorphological changes in the network is available. You can learn more about the method of creating a resource from the publication https://doi.org/10.3390/data6120127.