projected coordinate system EPSG 3857 or srid 900913

[sphwillis]

I would like to do web mapping and I couldn't find this Web Mercator projection in Alteryx. Where can I find it or is this projection called differently in Alteryx? If it doesn't exist, can Alteryx provide a Well Known Name/Text file? Reference here:http://spatialreference.org/ref/sr-org/7483/

Thanks!


EDIT:

Below is a dump of the WKT file from spatialrefenrence.org I would like to use. I am getting an error using this data in the custom projection field for the output I am trying to generate. 
Error: Output Data (2): No available conversion between projections
I even looked at other Alteryx projections to see the format and it does look different. See below. So I modified the custom projection text different ways but I cannot get it to work. Can you tell me how to fix this so I can get output with geometry in 3857 projection?
 
Thanks!


From http://spatialreference.org/ref/sr-org/7483/ogcwkt/


PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["X",EAST],AXIS["Y",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs"],AUTHORITY["EPSG","3857"]]
 


From Alteryx, custom projection data for Mercator & Robinson. Ignoring EXTENSION, it still looks different than above.

PROJCS["World_Mercator",
    GEOGCS["GCS_WGS_1984",
    DATUM["WGS_1984",
    SPHEROID["WGS_1984",6378137,298.257223563]],
    PRIMEM["Greenwich",0],
    UNIT["Degree",0.017453292519943295]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["False_Easting",0],
    PARAMETER["False_Northing",0],
    PARAMETER["Central_Meridian",0],
    PARAMETER["latitude_of_origin",0],
    UNIT["Meter",1]]
    
PROJCS["World_Robinson",
    GEOGCS["GCS_WGS_1984",
    DATUM["WGS_1984",
    SPHEROID["WGS_1984",6378137,298.257223563]],
    PRIMEM["Greenwich",0],
    UNIT["Degree",0.017453292519943295]],
    PROJECTION["Robinson"],
    PARAMETER["False_Easting",0],
    PARAMETER["False_Northing",0],
    PARAMETER["Central_Meridian",0],
    UNIT["Meter",1]]
 

[ChadM]

Is this in regards to mapping to an input or output?  In the Output Tool, you can specify a custom projection for certain file types, such as OleDB Spatial Database and ESRI SHP File.  

[sphwillis]

This is for output for shapefile used in a web map. By default, isn't the coordinate system set to WGS84 for output (I just installed 9.5 and I can' t tell anymore but I believe this the coord sys was used in older versions of Alteryx)? I would like to switch from wgs84 to 3857 for my output but I don't see it in the list of projections. Can you tell me how I can reproject to 3857?

[ChadM · Accepted solution]

In your output, try clicking on the Projection Properties:


Next, you can search for your projection.  I tried 3857, but could not find any matches.  Because of this, you can enter a custom projection here:


I recommend looking at examples of other projections to make sure you have the correct syntax.  Thanks!