Lab 2

Lab 1 | Lab 2 | Lab 3 | Lab 4 | Lab 5 | Lab 6 | Lab 7 | Lab 8 | Lab 9 | Lab 10 | Final Project

Lab 2 Screenshots

Lab 2 Information

The purpose of this lab was to understand data with unknown coordinate systems (that are missing their projection files), and how to convert them to the correct coordinate systems for proper display/analysis. I re-defined projections on Minnesota Department of Natural Resources (MNDNR) mosquito data with various unknown coordinate systems, using the Define Projection tool in ArcGIS Pro. Data are from north, central, and southern Minnesota surveys, and along a short section of the Mississippi River in east-central Minnesota. Provided are screenshots of these maps.

In addition to the MNDNR maps, I created a map of the world, with latitude and longitude lines and Tissot circles overlaid upon it. I projected the map with three different projections, and calculated the area of the northernmost Tissot circle for each projection. The areas are as follows:

The Cylindrical Equal Area (World) appears to be most accurate in this regard.

Finally, I chose a fourth projection at random (here, the Mollweide projection) and noted some pros and cons of using this projection on a map.