I need to convert a GCS_WGS_1984 data set to NAD_1983_UTM_Zone_14N. What transformation should I use?
The transformation to use depends on the area of North America that the data resides in. Definitions for the area of use for the Esri transformations (
NAD_1983_To_WGS_1984 in your case) can be found in "geographic_transformations.pdf" in your install directory (mine is at C:\Program Files (x86)\ArcGIS\Desktop10.0\Documentation). Here they are for
NAD_1983_To_WGS_1984. Note that the transformations are bi-directional:
NAD_1983_To_WGS_1984_1: 1188: Canada, Central America, Mexico, and United States (Alaska, CONUS) NAD_1983_To_WGS_1984_2: 1251: United States - Alaska - Aleutians NAD_1983_To_WGS_1984_3: 1252: United States - Hawai'i NAD_1983_To_WGS_1984_4: 1308: United States - CORS ITRF94 NAD_1983_To_WGS_1984_5: 1515: United States - CORS ITRF96 NAD_1983_To_WGS_1984_6: 1696: Canada - Quebec NAD_1983_To_WGS_1984_7: 1697: Canada - Saskatchewan NAD_1983_To_WGS_1984_8: 1702: Canada - Alberta