All geometries involved in this operation must have the same spatial reference

[suresh sharma]

Dear all

 

I am getting the following error message
 
"error: SWAT_HRUS - All geometries involved in this operation must have the same spatial reference"
 
I brought all the data into the same coordinate system but I still get this message. Can you please suggest me based on your experience.
 
thanks,
Suresh

[Jim Almendinger]

Make sure that all your GIS files are --
(1) in the same Geographic Coordinate System (GCS), for example, WGS84 or (in North America) NAD83
and
(2) in the same Projection -- commonly a UTM projection (identified by zone and hemisphere.  I'm in UTM15N, i.e., zone 15 in northern hemisphere). 

The first determines the 3-D reference spheroid that approximates the earth's shape, and the second determines the way that 3-dimensional surface is mapped onto a 2-D plane.  UTM is a convenient projection because it provides a rectilinear grid (horizontals are true E-W, and verticals are close to N-S but generally not exact).  Nearly all area and distance calculations in GIS are done on projected surfaces.  Hence ArcSWAT (which needs to know areas and lengths) needs projected data files. 

-- Jim

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From: "suresh sharma" <suresh...@gmail.com>
To: "SWAT-user" <swat...@googlegroups.com>
Sent: Wednesday, November 21, 2012 10:26:52 AM
Subject: [SWAT-user:3639] All geometries involved in this operation must have the same spatial reference

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