We are facing a very importan issue in our production site, for any particular geometry in our published parcel map (polygon fc) we see different values for shape area. Figure 1 shows a value of 2719.06456 in SHAPE.STArea(). This is from the Identify window.
When using the “Measure a Feature” option in the Measure Tool we see a value of 2435.802941.
This feature class is generated from a copy of the original parcel map on our production database and as you can see below, it shows an area of approximately 2435.761602 (it also shows a slight difference in the value in the windows but is pretty close).
The published map is created from a spatial view by joining a copy of the production map with a table from our tax database.
- Why the slight difference when using the identify tool and the Measure Tool?
- More importantly…Why the different values when comparing the production and the published maps? The Measure Tool looks like is providing the correct value.
This is a big problem for us since we published the area information so our users can analyse assessment values for the properties and compared with the tax system.