Geotransformation is not valid

Discussion created by lgtateos on May 24, 2014
Latest reply on May 24, 2014 by lgtateos
Hi All,

I'm trying to find the area of my Denver, Colorado polygons in kilometers (km) and I think my data is in Decimal Degrees, so I need to project it before using calculate field to calculate the area. 

My data properties say the following:
Data Type: Shapefile Feature Class
Shapefile: C:\foo.shp
Geometry Type: Polygon
Coordinates have Z values: No
Coordinates have measures: No

Geographic Coordinate System: GCS_WGS_1984
Datum:  D_WGS_1984
Prime Meridian:  Greenwich
Angular Unit:  Degree

My specific questions are:

  1. I think this means my data is in decimal degrees and I need to project it to get an accurate area measure in km.  Does this sound correct?

  2. I believe an appropriate coordinate system would be:

  3. NAD_1983_HARN_StatePlane_Colorado_Central_FIPS_0502_Feet

    My source of coordinate system selection is from here:

    Does this sound correct?

  4. The project tool requires a coordinate system transformation and I selected NAD_1983_To_WGS_1984_5.  Does this sound correct? 

  5. I based this selection on this source: http://blogs.esri.com/esri/arcgis/2009/05/06/about-geographic-transformations-and-how-to-choose-the-right-one/

    which says:
    HowTo: Determine which NAD_1983_To_WGS_1984 transformation to use--
    NAD_1983_To_WGS_1984_1 �?? for the entire North American continent.
    NAD_1983_To_WGS_1984_2 �?? for the Aleutian islands.
    NAD_1983_To_WGS_1984_3 �?? for Hawai�??i.
    NAD_1983_To_WGS_1984_4 �?? superseded by _5; this transformation method should no longer be used!
    NAD_1983_To_WGS_1984_5 �?? for the 48 contiguous United States.
    NAD_1983_To_WGS_1984_6 �?? for the Canadian province of Quebec.
    NAD_1983_To_WGS_1984_7 �?? for the Canadian province of Saskatchewan.
    NAD_1983_To_WGS_1984_8 �?? for the Canadian province of Alberta.

  6. I get an error when I run the Project (Data Management) tool. 
    Here's a picture of how I filled in the Project GUI: http://screencast.com/t/ARKUS3wQdf
    This is the error I get:
    ERROR 000151: The geotransformation(s) is not valid.  Failed to execute (Project). 
    Any ideas why this may be happening?

Thank you for your help!