Saturday, April 8, 2017

Temporal Mapping

The use of ArcGIS time feature can allow for analysis throughout time to promote extra visualization. The following maps are a good example of this. They visualize the volcanoes of recorded history and show their magnitude. As this is an accumulation the later maps have more features, but the time series indicates that the number grows exponentially. This is due to the addition of smaller eruptions as early volcanoes may not have been recorded if they eruptions occurred in areas without written language and the eruptions did not have a wide spatial impact. This is an assumption that would be difficult to make without the time visualization tool. 

In order to prepare this map I used the ArcMap time features to turn on the temporal settings in the eruptions layer. Next I built a frequency table through use of the Frequency tool in the Statistics toolset. From here I built a sequence count and connected the table to the Eruption layer and adjusted the time properties accordingly. From here I was able to create a video to display the map.

Early in the Time Series

Middle of the Time Series

Final step of the Time Series