Digitize Channel Unit Polygons
Use the Channel Units Tool to add the Channel Units (Field) layer to the Map Document. Channel Unit polygons must then be digitized (roughly) using the Water Extent polygon and Channel Unit Markers. These rough polygons will be clipped to the Water Extent polygon with the Stream Surface Tool.
CHaMP Toolbar\Topo Processing\Digitize Channel Unit Polygons
- Make sure the correct Survey Geodatabase is open.
- If you want to re-create your Channel Unit Polygons in a new empty feature class, check the box.
- Click OK to run the tool.
The new empty
Channel Unitslayer will be added to the map.
This is the
Channel_Units_Fieldfeature class in the survey geodatabase.
Roughly digitize the Channel Unit Polygons based on the channel unit markers that were collected in the field.
Start Editingto start an edit session and
Select the Create Featurestool:
Create Features menuof the Editor tool, select
Channel Unit 01.
In the bottom of the Create Features window under Construction Tools, select
In the MAP WINDOW, pan to the
u1channel unit marker as a starting point for your polygon.
It is ok to digitize the channel unit polygons LARGER than water surface extent polygon (in width across stream), but make sure they are DETAILED within the water surface polygon. Avoid creating overlapping or gaps between units. Snap them to Channel Unit flag
DO NOT need to follow the exact boundaries of the channel units; you just need a rough outline.
Continue clicking to generate vertices and digitize the polygon until you reach u2 flags.
Double Click OR Right Click/Finish Sketch to end a unit.
Repeat this digitizing process for all channel units in the site. Make sure to select a new Unit Number in the
Create Featuresmenu for each new channel unit.
Stop Editing after all units complete and Save Edits.
Once your Channel Units have been digitzied, you may proceed to Verify and Clip Channel Units.
- Make sure
Projected\Channel_Units_Fieldexists in the Survey Geodatabase, or check the checkbox to create a new