Visualizing Large Genealogies

The mapping technique illustrated below is used to visualize the distribution of every relative of some particular person. In a sense, the maps illustrate the "shape" of a given person's family.

Each circle in a map represents a person. Any two circles connected by a line correspond to parent and child. One of the circles (usually located somewhere near the center of the map) is special, since it corresponds to the person that all the others are related to.

If you'd like a map produced from your genealogical data, email adrianboyko@hotmail.com.


View Example

This example maps about 877 relatives of the person labeled "AB" in the map. Some other circles also contain initials, these corresponding to people who contributed information to the database used to generate the map.

Some circles have one or two colors with each color representing a different genetic marker. Colors filling the circle (e.g. or ) indicate particular Y-chromosomes while colors around the circumference of a circle (e.g. or ) indicates a particular mitochondiral DNA. Note that the distribution of these markers is mostly hypothetical and the vast majority of marked individuals have not been genetically tested.

Because this example is presented as a PNG, the image is static and only a certain amount of information can be presented. See the next example to see how dynamic formats like SVG allow more detailed information to be presented without overwhelming the illustration.


View Example

This example is based on the same dataset used in the previous example, but this map is in the SVG format. Because SVG supports interactive graphics, this map can display information in response to user input. In particular, when a user points at a circle in the map, the name of the person represented by that circle will appear. At the same time, all circles representing relatives who should have the same mtDNA will be highlighted with "". Finally, if the circle represents a male, then all relatives who should have the same Y-chromosome will be highlighted with "".

Note: Your browswer must support SVG in order to view this example. Try the Adobe SVG Viewer plugin if your browser doesn't yet handle SVG.


View Example

This map was produced from a GEDCOM file which was posted on the web. It describes 1882 ancestors of one individual, and is interesting as an example of how we can visualize very large families.

Some interesting structures are visible in the map, including three or four long lineages which eventually merge into a common set of ancestors. It would be difficult or impossible to discover such interesting structures in such a large GEDCOM file when using typical genealogy charts or software.