topic Help converting coordinate systems in Coordinate Reference Systems Questions https://community.esri.com/t5/coordinate-reference-systems-questions/help-converting-coordinate-systems/m-p/729369#M36 <HTML><HEAD></HEAD><BODY><P>To all, I am a very rudimentary user of ArcMap 10.3.1, I use it for several basic operations that typically involve exporting portions of data sets to CAD.&nbsp; However, I have a data set that I believe I need to convert in order to export properly.&nbsp; The rundown:</P><P></P><P>FEMA makes available GIS data for floodzone information on a County level.&nbsp; This data comes as GCS: GCS_North_American_1983, Datum: D_North_American_1983.&nbsp; We also have the County-produced parcel data which comes as PGS: NAD_1983_StatePlane_Kansas_South_FIPS_1502_Feet</P><P></P><P>When adding the two data sets to ArcMap 10.3.1, they align appropriately.&nbsp; However, when exporting (such as clipping the FEMA data to a single parcel which is what we will typically do) the FEMA data is scaled at 1/10000 or less and is not aligned with the parcel data at all.&nbsp; It also appears the FEMA data is reduced in a different scale in the Y-axis when the data is manually aligned and scaled.</P><P></P><P>I would think this is a result of the different coordinate systems though I can not understand why it would appear correctly in Arc but not as soon as you export.&nbsp; Can someone provide a step by step process to address this issue? </P><P></P><P>I'm certain it's frustrating to well-versed users reading posts like this, but I truly appreciate any help.&nbsp; I find it easier to learn by repeating the actions than trying to stumble through the help index without fully knowing my fundamentals.</P></BODY></HTML> Tue, 15 Dec 2015 17:59:23 GMT AaronObermiller1 2015-12-15T17:59:23Z Help converting coordinate systems https://community.esri.com/t5/coordinate-reference-systems-questions/help-converting-coordinate-systems/m-p/729369#M36 <HTML><HEAD></HEAD><BODY><P>To all, I am a very rudimentary user of ArcMap 10.3.1, I use it for several basic operations that typically involve exporting portions of data sets to CAD.&nbsp; However, I have a data set that I believe I need to convert in order to export properly.&nbsp; The rundown:</P><P></P><P>FEMA makes available GIS data for floodzone information on a County level.&nbsp; This data comes as GCS: GCS_North_American_1983, Datum: D_North_American_1983.&nbsp; We also have the County-produced parcel data which comes as PGS: NAD_1983_StatePlane_Kansas_South_FIPS_1502_Feet</P><P></P><P>When adding the two data sets to ArcMap 10.3.1, they align appropriately.&nbsp; However, when exporting (such as clipping the FEMA data to a single parcel which is what we will typically do) the FEMA data is scaled at 1/10000 or less and is not aligned with the parcel data at all.&nbsp; It also appears the FEMA data is reduced in a different scale in the Y-axis when the data is manually aligned and scaled.</P><P></P><P>I would think this is a result of the different coordinate systems though I can not understand why it would appear correctly in Arc but not as soon as you export.&nbsp; Can someone provide a step by step process to address this issue? </P><P></P><P>I'm certain it's frustrating to well-versed users reading posts like this, but I truly appreciate any help.&nbsp; I find it easier to learn by repeating the actions than trying to stumble through the help index without fully knowing my fundamentals.</P></BODY></HTML> Tue, 15 Dec 2015 17:59:23 GMT https://community.esri.com/t5/coordinate-reference-systems-questions/help-converting-coordinate-systems/m-p/729369#M36 AaronObermiller1 2015-12-15T17:59:23Z