To calculate the area, type the following expression for the field and click OK.In the attribute table, right-click the header of the desired field and click Field Calculator.Use a Python script in the Field Calculator with the dataset in a PCS Use the Field Calculator and the Add Geometry Attribute tool to calculate areas and lengths of feature layers after projecting the dataset to a PCS. For more information, refer to ArcMap Web Help: Calculating area, length, and other geometric properties. This is due to the variation in the spatial properties and distortions of the different coordinate systems. When both the dataset and the data frame use a PCS but of different coordinate systems, the output may vary slightly.For more information, refer to ArcMap Web Help: Fundamentals of field calculations. The Field Calculator and Add Geometry Attribute tools use geodesic geometry for calculation. This is because the Calculate Geometry tool uses planar geometry for calculations. The Calculate Geometry tool only returns the correct results when the dataset is projected. The Calculate Geometry tool defaults to the coordinate system used by the data frame. The dataset uses a geographic coordinate system (GSC) while the data frame uses a projected coordinate system (PCS).The same issue also occurs when calculating the length of line features and perimeters of polygon features. Originally developed to help with role playing game mapping, the Hexagon Calculator is a simple tool to assist anyone with basic measurement questions about the. In ArcMap, when using the Calculate Geometry tool to calculate areas of a feature layer, the output in the attribute table is different compared to the areas calculated by the Field Calculator and the Add Geometry Attribute tools.

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Problem: The Calculate Geometry tool returns different area results than the Field Calculator and Add Geometry Attribute tools Description

Find x geometry calculator