topic Projection Issue: Two Layers not matching up in Mapping Questions https://community.esri.com/t5/mapping-questions/projection-issue-two-layers-not-matching-up/m-p/620574#M6748 <HTML><HEAD></HEAD><BODY><SPAN>Here is what I did and am trying to figure out: I took a table with coordinates and added XY then exported to a shapefile (which is attached in the Everylocation shapefile). Then I added this shapefile into a Arcmap project with a layer called PublicNotices (which is attached). When I added the Everylocation shapefile, some of the points are displayed out in the ocean. I began to think that those points out in the ocean were the wrong coordinates and I was going to delete them. Then I wanted to compare them to the publicnotice shapefile.&nbsp; The PublicNotice file has some of the same points as the Everylocation file and the two should overlap. How do I determine if this is a projection issue and fix it or to determine which file has the wrong coordinates?</SPAN></BODY></HTML> Wed, 06 Jul 2011 18:55:35 GMT AprilTaylor 2011-07-06T18:55:35Z Projection Issue: Two Layers not matching up https://community.esri.com/t5/mapping-questions/projection-issue-two-layers-not-matching-up/m-p/620574#M6748 <HTML><HEAD></HEAD><BODY><SPAN>Here is what I did and am trying to figure out: I took a table with coordinates and added XY then exported to a shapefile (which is attached in the Everylocation shapefile). Then I added this shapefile into a Arcmap project with a layer called PublicNotices (which is attached). When I added the Everylocation shapefile, some of the points are displayed out in the ocean. I began to think that those points out in the ocean were the wrong coordinates and I was going to delete them. Then I wanted to compare them to the publicnotice shapefile.&nbsp; The PublicNotice file has some of the same points as the Everylocation file and the two should overlap. How do I determine if this is a projection issue and fix it or to determine which file has the wrong coordinates?</SPAN></BODY></HTML> Wed, 06 Jul 2011 18:55:35 GMT https://community.esri.com/t5/mapping-questions/projection-issue-two-layers-not-matching-up/m-p/620574#M6748 AprilTaylor 2011-07-06T18:55:35Z Re: Projection Issue: Two Layers not matching up https://community.esri.com/t5/mapping-questions/projection-issue-two-layers-not-matching-up/m-p/620575#M6749 <HTML><HEAD></HEAD><BODY><SPAN>You definitely have a few bad points in BankPermits. One is FID = 349. The latitude value is the same at the longitude value, just the sign changed. That's why it shows up so far north compared to rest of the data. FID = 303 has the wrong Northing value (it's currently equal to the Easting value).</SPAN><BR /><BR /><SPAN>I don't know what's wrong with point FID = 387, if all the points are supposed to fall within South Carolina. The latitude value is 30.3114 when all other points have latitude values over 31 degrees.</SPAN><BR /><BR /><SPAN>For the other points in BankPermits that fall offshore, I don't have a ready answer for you. It's possible that the latitude-longitude values for some points that they may be in DMS rather than decimal degrees. For example, FID = 115 has:</SPAN><BR /><BR /><SPAN>latitude = 32.4507</SPAN><BR /><SPAN>longitude = -80.0103</SPAN><BR /><BR /><SPAN>If we treat these as DD.MMSS and convert to decimal degrees, they become</SPAN><BR /><BR /><SPAN>latitude = 32.751944</SPAN><BR /><SPAN>longitude = -80.0175</SPAN><BR /><BR /><SPAN>Or they could be DD.MMmm which converts to</SPAN><BR /><BR /><SPAN>latitude = 32.751167</SPAN><BR /><SPAN>longitude = -80.017167</SPAN><BR /><BR /><SPAN>Without knowing where the point's supposed to be, I can't tell if either of these is correct.</SPAN><BR /><BR /><SPAN>Melita</SPAN></BODY></HTML> Wed, 06 Jul 2011 20:15:55 GMT https://community.esri.com/t5/mapping-questions/projection-issue-two-layers-not-matching-up/m-p/620575#M6749 MelitaKennedy 2011-07-06T20:15:55Z