topic Re: Acreage does not match the polygon Shape.STArea() calculated in ARCGIS Pro in ArcGIS Parcel Fabric Questions

Acreage does not match the polygon Shape.STArea() calculated in ARCGIS Pro

JoshCruz — Mon, 02 Oct 2023 18:05:52 GMT

Using ARCGIS Pro 3.1.

In the document the surveyor states: "1.789 acres (78,330 square feet), more or less."

After entering the coordinates with the traverse tool and triple checking, the attribute table shows that the Shape.STArea() is 12146.758807.

I looked up all SRID in the sys.spatial_reference_systems and they all use square metres.

I created a label class that calculates the acreage with this VBscript&colon; "Acres: " & Round(CDbl([Shape.STArea()]/4046.85642), 3)

The acreage for the parcel comes out to about 3.002.

I did a test by creating another polygon and using the measure distance tool to measure it. The measure distance tool and the acreage label class calculation match.

Should I just take the surveyor's statement "1.789 acres (78,330 square feet), more or less." and the 1.2 acre difference as the "more" and go ahead and map it?

I am pretty new to GIS so I really appreciate any help or advice.

Re: Acreage does not match the polygon Shape.STArea() calculated in ARCGIS Pro

ThomasHoman — Mon, 02 Oct 2023 18:30:44 GMT

You have a problem somewhere so better to figure it out early rather than fixing later. Almost double would be too far off to accept. Is there a chance that the surveyor was splitting a larger lot that your traversal described and you missed the splitting line?

Could you share the survey document and where you are located/expected coordinate system

Re: Acreage does not match the polygon Shape.STArea() calculated in ARCGIS Pro

JoshCruz — Mon, 02 Oct 2023 18:58:34 GMT

Ah yes I made a mistake there are two parcels a northern and southern half and the northern is the larger one. Can't believe I made this mistake but thanks anyway @ThomasHoman !

Re: Acreage does not match the polygon Shape.STArea() calculated in ARCGIS Pro

ThomasHoman — Mon, 02 Oct 2023 20:03:10 GMT

@JoshCruz Sweet! We've all done the same thing.