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Coordinate System Transformation

AlexandraVoight

Hello,

I have 2 layers. Layer 1 has Geographic Coordinate System: WGS 84 and Datum: WGS_1984. Layer 2 has Geographic Coordinate System: WGS_1984 and datum WGS_1984. In order to clip these layers, apparently they need to have the same coordinate system. So, I used the "Projections and Transformations" tool in the ArcToolbox to transform the 1st layer's coordinates to WGS_1984. There is a drop down list that you can choose which Geographic Transformation you would like to apply. When I click on the drop down, it provides no options for transformations. If I skip this step and press "OK," the transformation to WGS_1984 fails with the following errors (screenshot attached). What do I need to do to make this transformation so I can finally clip the layers?

Capture.PNG

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curtvprice

It sounds like to me like they are the same coordinate system, just the labeling is different. This sometimes happens with datasets created from different software or versions of software.

If they really are the same, you can use the Define Projection tool to define them both to WGS 1984 (to find it in the dialog search for 4326). May want to work on a copy if you are not sure about this.

AlexandraVoight

Hmmm I'm trying to do this, but I get an error saying "output name is not valid."

JayantaPoddar

Could you save (Export Data) the layers as a shapefile or FGDB Feature Class, and then run the Project/Clip tool?

AlexandraVoight

Thanks for taking a look at this! Unfortunately I can't share the first dataset due to company policy, but attached are its properties. Does that help?

Capture.PNG

JayantaPoddar

Something looks off in the coordinate system of the input data. Since both the layers' datum are same, there shouldn't be a need for a transformation method.

Could you share the input datasets (sample), so that we could have a look at it?

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