Additional Representations There are two additional graphic representations that serve to communicate both the spatial and temporal element that are worth outlining in this documentation. The first methodology is described as a “Life-path line graphic”. The second, is described as a “Space-time path” or “Space-time prism”. These two methods are used in other research articles to describe the movement of populations through periods of time. The use these graphics aids the reader in understanding the spatio-temporal elements of the data being described, while providing a means to quickly communicate an event or series of events related to a specific population. Life-Path Line Graphic A “Life-path line graphic” is a simplistic graphic consisting of a line drawn along a defined scale of time that is typically shown along the x-axis. This technique is similar to the time-scale technique displayed in Figure 4.4. The line can be straight or bend, curve, and turn sharp angles along the y axis to show a change in spatial location. An example of this methodology, used by the historical geographer Anne Knowles (1995) to visualize migration steps by nineteenth-century Welsh individuals, is shown below in Figure 4.5. Figure 4.5: An example life-path graphic describing a spatial element (Rural, Industrial, or Town/City location) over a defined period of time. A legend is included to aid in communication of significant life events along the line. Symbology is used along the lines to communicate the occurrence of life events either at a specific point in time, or a range of time. In the above example, Thomas J. Jones is described as remaining in a “rural” location for the entire period of time represented in the time-scale along the x-axis. He experienced several life events that include: A move around 1815 A period of local mobility from 1820 to 1831 Marriage around 1832 Emigration around 1848 Two “new farms”, one around 1850 and the other around 1858 The resolution of the spatial element is not in this example, due to the vague descriptions of “Rural”, “Industrial”, and “Town/City”. These could easily be further defined in a genealogic body of
Additional Representations There are two additional graphic representations that serve to communicate both the spatial and temporal element that are worth outlining in this documentation. The first methodology is described as a “Life-path line graphic”. The second, is described as a “Space-time path” or “Space-time prism”. These two methods are used in other research articles to describe the movement of populations through periods of time. The use these graphics aids the reader in understanding the spatio-temporal elements of the data being described, while providing a means to quickly communicate an event or series of events related to a specific population. Life-Path Line Graphic A “Life-path line graphic” is a simplistic graphic consisting of a line drawn along a defined scale of time that is typically shown along the x-axis. This technique is similar to the time-scale technique displayed in Figure 4.4. The line can be straight or bend, curve, and turn sharp angles along the y axis to show a change in spatial location. An example of this methodology, used by the historical geographer Anne Knowles (1995) to visualize migration steps by nineteenth-century Welsh individuals, is shown below in Figure 4.5. Figure 4.5: An example life-path graphic describing a spatial element (Rural, Industrial, or Town/City location) over a defined period of time. A legend is included to aid in communication of significant life events along the line. Symbology is used along the lines to communicate the occurrence of life events either at a specific point in time, or a range of time. In the above example, Thomas J. Jones is described as remaining in a “rural” location for the entire period of time represented in the time-scale along the x-axis. He experienced several life events that include: A move around 1815 A period of local mobility from 1820 to 1831 Marriage around 1832 Emigration around 1848 Two “new farms”, one around 1850 and the other around 1858 The resolution of the spatial element is not in this example, due to the vague descriptions of “Rural”, “Industrial”, and “Town/City”. These could easily be further defined in a genealogic body of
Hawley_596B_20140416.docx