IR Interpreter We have noticed a slow shift in our data. It is now 2 meters from where the original fire perimeter was located. Please use the perimeter 2017####_####_BrianHead_HeatPerimeter_wgs84.shp to add your IR edits. To calculate acres and to align features, set your Data Frame Properties to Projection NAD_1983_UTM_zone12. Use Transformation NAD_1983_To_WGS_1984_5 in the Transformations option. Do not change or reproject our data. Use the other files as well. Thanks, Andrew Thompson GISS 706-399-6459 Jim Grace GISS 541-771-4521