If the table on which an x,y event layer is based does not have an ObjectID field, you won't be able to perform certain tasks on the layer. Note:Īs an alternative, you can use the Catalog window to select the table that contains the x,y columns and create a feature class. You can also add x,y data in tables as a new feature class using geoprocessing. Identify the columns that hold the x- and y-coordinates (and, optionally, the z-coordinate).Select the table that contains x,y coordinate data.In 3D, you can also change properties such as the layer's vertical exaggeration or its offset from an elevation surface. For instance, you can decide whether you want to display it, symbolize it, set the visible scale, or display a subset of features that meet some criteria. Once you have added the data to your map, globe, or scene, it becomes an x,y event layer and behaves like other point feature layers. If the fields are not numeric, such as when the coordinate value is stored in degrees, minutes, and seconds (for example, -120 13 58), the coordinates will be converted and displayed as decimal degrees. A field for the z-coordinates that enables 3D geometry is optional. The values in the fields may represent any coordinate system and units such as latitude and longitude or meters. To add a table of x,y coordinates to your map, globe, or scene, the table must contain two fields: one for the x-coordinate and one for the y-coordinate. You can easily collect x,y coordinate data using a GPS (also, frequently an elevation -value). X,Y coordinates describe points on the earth's surface such as the location of fire hydrants in a city or the points where water samples were collected. If the table also contains z-coordinates, such as elevation values, you can add tabular data as 3D content into your globe or scene. In addition to data sources, such as a shapefile, you can add tabular data that contains geographic locations in the form of x,y coordinates to your map.
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