topic Re: Issue with data reprojection in Data Management Questions

Issue with data reprojection

DannetteWeiss1 — Mon, 05 Oct 2015 22:15:03 GMT

I have a set of data that was in the following projection (two images with the projection info followed by an image of the extent):

This projection was, for the most part correct, except that it is in meters and not foot which I needed it in to match the projection of the other feature classes supplied by my organization. So I projected it by using Data Management Tools\Projections and Transformations\Project. In the Project Window I used the Layers feature within the Spatial Reference Properties to select the same projection that was being used by the other feature classes. I ended up with the following:

As you can see the extent in this final image above is off and my points are way off. See below (green dots are correct while the purple are way off).

I tried to project the dataset back to the original but still places them in the wrong area. I am at a loss of how to correct this and don't understand why there is an issue as I used the same projection used by the other layers in my map.

Any idea on 1) what I did wrong and 2) how do I get them back to the correct location using NAD 83 Zone 12 and in Foot_US for linear measurement?

TIA

Re: Issue with data reprojection

MelitaKennedy — Mon, 05 Oct 2015 23:18:54 GMT

The Poles data is in latitude-longitude, decimal degrees. Redefine the coordinate system as NAD83 using the Define Projection tool or the data's property page in ArcCatalog.

Melita

Re: Issue with data reprojection

DannetteWeiss1 — Tue, 06 Oct 2015 13:35:54 GMT

Melita,

Thank you for the assistance! I did the Define but no change. Here's the results from the process (hopefully you can see enough of it):

Here's a screen shot post-Define:

Any ideas?

Re: Issue with data reprojection

DavidMunyiri1 — Tue, 06 Oct 2015 13:48:27 GMT

i guess maybe its the coordinate system that is wrong.let me check then i'll get back to you

Re: Issue with data reprojection

MelitaKennedy — Tue, 13 Oct 2015 21:13:40 GMT

I'm sorry about the late reply.

To me, it looks like you defined the projection (projected coordinate system) to be a UTM zone. Is that correct?

If so, that's not right, you need to define it as a geographic coordinate system, probably NAD 1983 aka North American Datum 1983. It's in the geographic coordinate systems, North America folder.

Melita