Mixed GCS WGS and North American to projected Coordinate System Question

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08-21-2016 02:48 PM
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PROBERT68
Regular Contributor III

Hello,

As I am preparing to gathering a lot of shapefiles that I am going to have to export them to my geodatabase. The Geodatabase will have it's NAD_1983_UTM_Zone_13N (26913).

I have a lot of them that are in  GCS_WGS_1984 (4326) and some GCS_North_American_1983 (4269).

My question to you all.

Should I project the GCS_WGS_1984 shapefiles to GCS_North_American_1983 first and then re-project it to NAD_1983_UTM_Zone_13N ?

I was thinking it is because the WGS it does not have any coordinate system and so it needs to project to GCS_North_American to get the correct coordinate system ?

Or, should I just go ahead and export them to NAD_1983_UTM_Zone_13N straight to the Geodatabase which it has that projected coordinate system ?

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4 Replies
DanPatterson_Retired
MVP Esteemed Contributor

GCS_WGS_1984 (4326)    is a geographic coordinate system with a WGS84 datum 

are you sure about the 4269  is it http://spatialreference.org/ref/epsg/4269/

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PROBERT68
Regular Contributor III

Yes, this is correct number 4326 since if you open up ArcMap and then hit the Layers then Coordinate System tab....Find it in the Geographic Coordinate  System -----> World ---> WGS_1984

Here is the screenshot.

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DanPatterson_Retired
MVP Esteemed Contributor

4269 was what I was inquiring about

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NeilAyres
MVP Frequent Contributor

The projection from GCS on one dataum to a PCS based on another datum can be done in one step using the Project tool or export from ArcMap. You just need to have set the correct transformation to get the datum shift sorted out.

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