1. Navigate to the desired Web Map ព័ត៌មានលម្អិតអំពីធាតុ

2. ចុច Open in Map Viewer

3. See the Web Map

4. ចុច មាតិកា

5. Click the Show Table រូបតំណាង under the desired layer

ចំណាំ: This example uses the Pradan geometry – Polygon layer

6. See the Table View

7. ចុច ជម្រើស

8. ចុច Add Field

9. Fill out all content

ចំណាំ: This example uses double type for its numerical field for area in hectares

10. ចុច Add New Field

11. See the new Field in the Table

ចំណាំ: This example uses the Hectares field

12. Click on the field name, Hectares

13. ចុចលើ Calculate

14. នេះ។ Calculate Field window appears

15. Fill out the SQL Expression

Expression: POWER(Shape__Area,2)/10000

Explanation: The Shape_Area field is in meters. In order to convert meters to hectares, you must base the expression on the following equation: Ha = m2/1,000

16. ចុច Calculate

17. See that the Hectares field has been calculated