Is the layer CRS a projected CRS, e.g., with units of feet?
If a geographical CRS, such as WGS84, measured in degrees Lat/Long it
won't work.
Also, does the layer include at least 1 polygon? If not then you'll see
"NULL".
But I've never seen "nan" in that context.
I've used the approach you describe many times.
Garth Fletcher
On 2/14/25 Marc Bordelon <[email protected]> wrote
Subject: [Qgis-user] Calculate acres
I've created a shape file, geometry is polygon, I have the CRS set as
what the project is set at.I open the field calculator-Create a new
field "Acres" - set the Output field type to "Decimal number (real) -
output field length to 5 and precision to 2 - using the Geometry-
expression: $area to calculate the acres it gives me "nan" for the
preview. No acres.I've been able to create a new field and calculate
acres and length (ft) with no problem.?
I'm running qgis 3.34.7
[email protected]
_______________________________________________
QGIS-User mailing list
[email protected]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
