topic Re: Why displayed XY data and other layers not in the same spatial extent? in Coordinate Reference Systems Questions

Why displayed XY data and other layers not in the same spatial extent?

HaoHuang — Tue, 23 Jan 2018 04:47:07 GMT

I need define a projection system for the county map in Utah. I will first define counties.shp files by selecting a predefined geographic coordinate system and then the UTMutah projection. A custom coordinate system, UTMutah has the following parameter values. I need display XY data of Utah hospital, but even if I use the same projection UTMutah as counties.shp. They are far away each other, not correctly in the same spatial extent. I attached the counties.shp and hospital cvs data. Could you please let me know which step I am getting wrong? Thanks.

Projection: Transverse_Mercator

False_Easting: 500000.000000

False_Northing: 0.000000

Central_Meridian: -111.000000

Scale_Factor: 0.999600

Latitude_Of_Origin: 0.000000

Linear Unit: Meter (1.000000)

Geographic Coordinate System: GCS_North_American_1983

Angular Unit: Degree (0.017453292519943295)

Prime Meridian: Greenwich (0.000000000000000000)

Datum: D_North_American_1983

Spheroid: GRS_1980

Semimajor Axis: 6378137.000000000000000000

Semiminor Axis: 6356752.314140356100000000

Inverse Flattening: 298.257222101000020000

Re: Why displayed XY data and other layers not in the same spatial extent?

JayantaPoddar — Tue, 23 Jan 2018 05:20:40 GMT

Hao,

The coordinate values of XY data are in Decimal Degrees. So you need to define an appropriate Geographic Coordinate System for this.

When adding the XY data to ArcMap, define the spatial reference as "GCS_North_American_1983" (WKID:4269).

Once you create the XY event layer, use Project tool to reproject it to UTMutah.

Re: Why displayed XY data and other layers not in the same spatial extent?

MelitaKennedy — Tue, 23 Jan 2018 20:46:13 GMT

UTMutah is just NAD 1983 UTM zone 12 North. I recommend that you use 26912 instead (it's found in projected coordinate systems, utm, nad 1983)

Melita