topic Projection for the NE Atlantic? in ArcGIS Mapping and Charting Questions https://community.esri.com/t5/arcgis-mapping-and-charting-questions/projection-for-the-ne-atlantic/m-p/660630#M2321 <HTML><HEAD></HEAD><BODY><SPAN>I was wondering if anyone might have any suggestions to my problem. I'm looking to find a single conformal projection that spans from UTM 27N to UTM 30N and between parallels 50.2 and 58.5 (roughly south of Iceland to Scotland). I'm trying to merge a number of bathymetry rasters in order to extrapolate data/derive layers (inc., slope, aspect, curvature, rugosity, bathymetric position index (BPI)) with minimal distortion.</SPAN><BR /><BR /><SPAN>All help and suggestions greatly appreciated.</SPAN><BR /><SPAN>Cheers,</SPAN><BR /><SPAN>Fionn</SPAN></BODY></HTML> Tue, 18 Sep 2012 12:48:23 GMT FionnFarrell 2012-09-18T12:48:23Z Projection for the NE Atlantic? https://community.esri.com/t5/arcgis-mapping-and-charting-questions/projection-for-the-ne-atlantic/m-p/660630#M2321 <HTML><HEAD></HEAD><BODY><SPAN>I was wondering if anyone might have any suggestions to my problem. I'm looking to find a single conformal projection that spans from UTM 27N to UTM 30N and between parallels 50.2 and 58.5 (roughly south of Iceland to Scotland). I'm trying to merge a number of bathymetry rasters in order to extrapolate data/derive layers (inc., slope, aspect, curvature, rugosity, bathymetric position index (BPI)) with minimal distortion.</SPAN><BR /><BR /><SPAN>All help and suggestions greatly appreciated.</SPAN><BR /><SPAN>Cheers,</SPAN><BR /><SPAN>Fionn</SPAN></BODY></HTML> Tue, 18 Sep 2012 12:48:23 GMT https://community.esri.com/t5/arcgis-mapping-and-charting-questions/projection-for-the-ne-atlantic/m-p/660630#M2321 FionnFarrell 2012-09-18T12:48:23Z Re: Projection for the NE Atlantic? https://community.esri.com/t5/arcgis-mapping-and-charting-questions/projection-for-the-ne-atlantic/m-p/660631#M2322 <HTML><HEAD></HEAD><BODY><SPAN>Hi Fionn,</SPAN><BR /><BR /><SPAN>I don't know of anything off-hand. There are some sea ice and other coordinate systems from NSIDC (EASE), but nothing that jumps out. Most are also equal area, not conformal. You may want to create a custom coordinate system using Lambert conformal conic. One rule of thumb for choosing the standard parallels is to set them at 1/6 and 5/6 of the north-south extent.</SPAN><BR /><BR /><SPAN>Melita</SPAN></BODY></HTML> Tue, 18 Sep 2012 16:20:31 GMT https://community.esri.com/t5/arcgis-mapping-and-charting-questions/projection-for-the-ne-atlantic/m-p/660631#M2322 MelitaKennedy 2012-09-18T16:20:31Z Re: Projection for the NE Atlantic? https://community.esri.com/t5/arcgis-mapping-and-charting-questions/projection-for-the-ne-atlantic/m-p/660632#M2323 <HTML><HEAD></HEAD><BODY><SPAN>Hi Fionn,</SPAN><BR /><BR /><SPAN>Have you had a look at </SPAN><A href="http://www.georepository.com">http://www.georepository.com</A><SPAN> ?</SPAN><BR /><BR /><SPAN>This is quite a good site to find out the CRS of a given area. For the area you describe I found the following possible projection:</SPAN><BR /><BR /><SPAN>North Pole Lambert Azimuthal Equal Area (Europe) with WGS84 / North Pole LAEA Europe as an applicable CRS. I believe this is a valid projection for the world at latitudes of 45 degrees and above.</SPAN><BR /><BR /><SPAN>Simon</SPAN></BODY></HTML> Mon, 01 Oct 2012 12:20:24 GMT https://community.esri.com/t5/arcgis-mapping-and-charting-questions/projection-for-the-ne-atlantic/m-p/660632#M2323 SimonKettle 2012-10-01T12:20:24Z