Layer Estimates:

Layer: ssForceMain (ID:45)
Count: 3
Extent:

XMin: 12837259.1458333
YMin: 289236.636067688
XMax: 12843131.328125
YMax: 289823.739583313
Spatial Reference: PROJCS["NAD_1983_StatePlane_Michigan_South_FIPS_2113_IntlFeet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",13123359.58005249],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-84.36666666666666],PARAMETER["Standard_Parallel_1",42.1],PARAMETER["Standard_Parallel_2",43.66666666666666],PARAMETER["Latitude_Of_Origin",41.5],UNIT["Foot",0.3048]]

Layer: ssGravityMain (ID:46)
Count: 260
Extent:

XMin: 12835589.1022135
YMin: 287055.475260392
XMax: 12842958.8216146
YMax: 294525.869791642
Spatial Reference: PROJCS["NAD_1983_StatePlane_Michigan_South_FIPS_2113_IntlFeet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",13123359.58005249],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-84.36666666666666],PARAMETER["Standard_Parallel_1",42.1],PARAMETER["Standard_Parallel_2",43.66666666666666],PARAMETER["Latitude_Of_Origin",41.5],UNIT["Foot",0.3048]]