Do the differences between these numbers below (i.e. Standard_Parallel_1 & _2) matter at all when importing a .shp file exported from AutoCAD. We were thinking we used to just import .shp files and they would reflect the right WA SPN projection upon import, but now GIS is calling anything we import from CAD a "Custom" projection, presumably because ArcMap cannot relate to the way the .prj file is written from CAD. We can simply c/p the text from the GIS .prj into the CAD exported .prj - but people are asking me if it matters -
can anyone explain the differences in these nos. and whether we should be concerned or not?
GIS
PROJCS["NAD_1983_StatePlane_Washington_North_FIPS_4601_Feet",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",1640416.666666667],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-120.8333333333333],PARAMETER["Standard_Parallel_1",47.5],PARAMETER["Standard_Parallel_2",48.73333333333333],PARAMETER["Latitude_Of_Origin",47.0],UNIT["Foot_US",0.3048006096012192]]
CAD (Map 3D)
PROJCS["NAD_1983_StatePlane_Washington_North_FIPS_4601_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.000,298.25722210]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1640416.667],PARAMETER["False_Northing",0.000],PARAMETER["Central_Meridian",-120.83333333333300],PARAMETER["Latitude_Of_Origin",47.00000000000000],PARAMETER["Standard_Parallel_1",48.73333333333333],PARAMETER["Standard_Parallel_2",47.50000000000000],UNIT["Foot_US",0.30480060960122]]