AnsweredAssumed Answered

which Coordinate Reference System (CRS) and/or Projection?

Question asked by RC123 on Feb 26, 2016
Latest reply on Feb 28, 2016 by RC123

The images of below are from my map and from another online topo map.  All the maps I have checked show Rose Island long and skinny like it does in the first map below. I think the Coordinate Reference System (CRS) or the Projection on my map is not correct.  I am using ArcMap   If I change the CRS, to UTM NAD 83 Zone 15, then Rose Island will look like it does on the first map, however, the data source says that the CRS for the data is:  NAD83 (EPSG:4269)  EPSG   which is what my map is set to. 

ArcMap shows my Data Frame and my vector data layers as below:


WKID: 4269 Authority: EPSG

Angular Unit: Degree (0.0174532925199433)

Prime Meridian: Greenwich (0.0)

Datum: D_North_American_1983

  Spheroid: GRS_1980

    Semimajor Axis: 6378137.0

    Semiminor Axis: 6356752.314140356

    Inverse Flattening: 298.257222101

I would think that the information supplied with the vector data specifying the CRS would be correct but the shape doesn't seem right.

I assume all the online and printed maps that I have checked are displaying Rose Island in the correct long and skinny shape.  Should I change the CRS on my map to make the Island look the way it does on other maps?

Also, I am new at this and I'm not sure what the difference is between CRS and "Projection" are they the same?  Or, maybe I have the CRS correct and the Projection wrong?

           All the printed and online maps that I checked show Rose Island as below.


         Below is my map with CRS GCS_North_American_1983 WKID: 4269 Authority: EPSG