Step 2 Check out this GeoNet thread, and choose the most useful method for you to calculate direction angle for your new attribute field. This will be the field which will store a rotation value as an angle from North. Name it "Bearing" or "Rotation" or similar, and set it's type to Double. Step 1 In Desktop (ArcMap, ArcGIS Pro) Add a new field attribute field to your lines feature class or layer. Next you will need an Advanced license level for Desktop (you may be able to follow the same thought process, but will require additional work-around or methods without Advanced). Please Note: Those with access to ArcGIS for Server can certainly publish map services that will support this type of symbology and can be displayed through ArcGIS Online. However there are probably many that do not have that option, so in this post I'll discuss a one method as a work-around to solve this.įirst things first, your line features must be digitized in the correct direction for this method to work. This means for utilities, or streams, routes or whatever line features you may be managing, you cannot easily display them with flow direction arrows as in Desktop. Please visit the Feedback page to comment or give suggestions on ArcGIS Desktop Help. To obtain an accurate representation of flow direction across a surface, the sinks should be filled. After a few years now of ArcGIS Online, there is still no support for non-simple line symbols. Cells with undefined flow direction can be flagged as sinks using the Sink function.
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