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- On the ribbon, click the Map tab.
- In the Selection group, click the Select By Location button.
- For ‘Input Features’, use the drop-down menu to select the Flowline layer.
- Use the second 'Input Features' drop-down menu to select the Catchment layer.
- For ‘Relationship’, use the drop-down menu to select "Have their center in".
- For ‘Selecting Features’, check the Subbasin layers.
- . (This setting ensures that catchments and flowlines which share the outside border with the subbasin will not also get selected.)
- For ‘Selecting Features’, use the drop-down menu to select the Subbasin layer.
- Ensure your ‘Select by Location’ window appears as shown below and click RunOK.
All of the flowlines and catchment areas that are within the subbasin are now selected.
- Export the selected Flowline features into your HydrologyLab geodatabase and name the new feature class “Flowlines”.
- Remove the original Flowline layer from the Contents pane.
- Repeat step 1-7 using Catchment layer as Input Feature Layer and name the new Export the selected Catchment features into your HydrologyLab geodatabase and name the new feature class “Catchments”.
- Remove the original Catchment layer from the Contents pane.
- Uncheck the new Uncheck the Catchments layer, so it is no longer visible.
Symbolizing features using a single symbol
- In the Contents pane, click the line symbol beneath the Flowlines layer name.
- In the ‘Symbology’ window under Gallery, At the top of the Symbology pane, click the Gallery tab and select the Water (line) symbol.
Calculating summary statistics for an attribute table field
- Open the FlowlinesFlowlines attribute table.
- RightScroll right to the 8th field and right-click the LENGTHKM field name and select Statistics….
Symbolizing features using a single symbol
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- Statistics.
From the ‘Statistics of Flowlines’ window Chart Properties pane on the right of map display, you can see there are 543 flowlines in the Buffalo-San Jacinto basin whose average length is 1.94 km and total length is 1052 km.
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