arcgis-desktoparcview-3directionlinesymbology
Is this possible in ArcGIS to have variable number of arrows on the line to show direction?
This is an ArcGIS example, where I can have fixed (1,2,3,4,5…) number of arrows and it stays the same doesn't matter what the line length is. First and last always stick to the end, doesn't help with network mapping, where there is usually the node to show. Having just one in the middle is never enough, check line at the right…
No such issues with ArcView 3:
So, I've done both; created the as-the-crow-flies lines that just go straight from the surface hole to the bottom hole and taken directional survey data and created the actual path the drill bit followed (sometimes referred to as the "worm track") to create the borehole. As-the-crow-flies is much easier, and as Kirk mentioned in a comment, the XY to Line Tool should do what you need I think. Basically, you want to connect the surface hole location (SHL) with the bottom hole location (BHL) - those two sets of coordinates for a directional/horizontal well are usually available. A few years back, I wrote some Python and created a tool to do what that does, as the XY to Line Tool wasn't around back then. So you ended up with something like this:
Now, as far as plotting the actual wellbore, if you can get your hands on the directional survey, you can use the azimuth and northing/easting of each MWD point to get a XY value for each point. So, like in the above as-the-crow-flies scenario, you are plotting the SHL and BHL, but also every other point in between. If you just need 2D, then the XY will get you that, if you want 3D, then you need to use the depth value (Z) from the MWD for each point as well. You can also M-enable the line which will allow you to plot the perforations along the wellbore. With this method, you can achieve something like the green lines below (apologies on the sloppy screenshot, had to cover up some info on it), where multiple wells are drilled from the same wellpad:
If you're lucky, the directional survey vendor might do some of the conversions of azimuth northing/easting for you already. Once you have your XY's (and ZM's possibly), then you plot the points in order from surface down and connect the dots to form the line. I did this in SQL Server 2008 Spatial before, and I'm not sure if ArcGIS has tools that can accomplish this out of the box; it could surely be coded in Python though.
You may add a triangle marker point style at the end of line "end". This should show at all zoom levels and show on any new features that are added. For details see this q/a:
Best Answer
Add an overlapping Marker Symbol line and make the Template as shown. For the marker symbol I used the Dimension Style set Solid Triangle 2 which points to the right. I resized it down from 18 points to 12 points.
Now I have a question for you. For the line ends marker I tried using the dual arrows and a green circle with a dot like you showed, but the circles are not centered on the ends of the lines. Are your green circle marker symbols at the line ends tied to the lines themselves or are they tied to extracted points from the line ends? (Note: The lines in the picture below do not split at every intersection for all lines).