projection and extend

[BahareSanaie-Movahed]

I imported projections for a  shapefile with unknown reference, but it doesn't sit on top of the layer which I imported the coordinate info from. The extend shows two different values! Do I need to change the projection, any suggestion for Massachusetts data? Any solution please? Thanks in advance. 

[JakeSkinner · Accepted solution]

Hi Bahare,

You will need to use the Define Projection tool to define the coordinate system of what the shapefile was created in.  Here is support article that discusses how to find this coordinate system:

How To: Identify an unknown projected coordinate system using ArcMap 

[ChrisCatania]

Hi Bahare - Thanks for asking your questions! I wanted to let you know that we're moving your question to the https://community.esri.com/community/gis/managing-data?sr=search&searchId=fc157cdb-db10-43c7-a25b-4c...‌ space so our Esri and user subject matter experts can further help answer this and future questions.  So you're aware on how and where to post your questions, here's a few quick tips and reminders:

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1. The GeoNet GeoNet Help group is for questions and tips on how to use the GeoNet community platform not the Esri ArcGIS platform. Following steps 1 & 2 above will give you the best results for getting Esri product questions answered.
2. This GeoNet 101 "How to Ask Questions on GeoNet" post is also a helpful guide to asking questions: https://community.esri.com/community/help-and-feedback/blog/2016/08/15/community-news-and-tips-how-t...

Thanks again for contributing and I hope this helps and let us know if you have any questions.