King Edward I of England's castle building program in Wales from 1282 to 1295 provides a unique event that can be studied in further detail. Edward's castle building program turns the conquest of Wales into an early example of what future English colonization would become. By examining the building of Conwy and Caernarvon in Wales and the accompanying social programs we are better able to understand how the English viewed conquest and colonization. The conquest spent approximately £35,000 on the building of the castles of Conwy and Caernarvon, a colossal sum for the time. The reallocation of resources from England into Wales provide important similarities to later colonial endeavors, especially in the large application of manpower to build successful colonies. Another similarity becomes the split between the use of local raw resources such as the stone and timber combined with the need for manufactured goods brought from England. The social changes also had a major impact. The construction of Edward's castles Conwy and Caernarvon replaced iconic locations of Welsh power. The accompanying Statute of Wales (1284) changed the Welsh legal landscape and forced the English legal system on the Welsh. By replacing Welsh locations of power and instituting legal reform England made it possible for its colonists to safely enter northern Wales and take control of the region.

Southern Louisiana is experiencing a dramatic loss of freshwater wetlands as a result of natural and man-made changes in the landscape. Multitempral remotely sensed data were used to examine the impact of the Caernarvon Freshwater Diversion Structure, built in 1991 to divert water to Breton Sound. Satellite imagery data covering the period from 1974 to 2006 were analyzed by computing several spectral indices including NDVI, VI, IR/R, Sqrt IR/R, T-NDVI, and NDWI, as well as principle component analysis. The resulting enhanced images were classified into two classes, vegetation or open water. The ratios of vegetation to open water were then calculated and the changes graphed over the 1974-2006 timeframe. The results indicated that despite the infusion of freshwater, the open water portion of the Breton Sound area continued to expand, indeed the expansion rate increased from approximately 0.25% per year before construction of Caernarvon to 0.45% per year after construction.