GIS6005: Coordinate Systems

 

    

    For this lab, we looked at how different map projections and coordinate systems influence distortion, and how to choose an appropriate projection for a study area. We compared distortions across several world projections, evaluated conic projections for the U.S., and selected the best coordinate systems for both a Canadian province and a U.S. state based on their size, shape, and mapping needs.

    For the map pictured above, I found NAD 1983 UTM Zone 14N is an appropriate coordinate system for mapping Oklahoma, because the majority of the state falls within this UTM zone. This helps to provide a consistent scale and low distortion across its East to West extent. Although small portions of Oklahoma extend into neighboring UTM zones, selecting the zone that covers most of the state is standard practice for statewide mapping, especially when we're missing a single State Plane or any State System projection. UTM is a conformal system, so it preserves local shape and relationships, making it suitable for a general reference map where accurate relative positioning is important.