Can I place a line on a point using an attribute for the angle?

[KristineMuma]

I have a set of points that I need to label in another software that has very limited labeling capabilities. We really need to be able to rotate the label by an attribute that we store. We came up with the desire to be able to place a line on that point of a predefined length and set the direction of the line to be in the angle of the rotation field. Has anyone ever attempted this?

[WesMiller]

Have you considered Annotation

http://resources.arcgis.com/en/help/main/10.2/index.html#//01m70000000w000000

[KristineMuma]

Unfortunately Annotation is not an option. And using the annotation polygon isn't working because anything that is a single digit is labeling incorrectly or not at all in this third party software. We are extremely disappointed that this was not going to work! Thanks

[DarrenWiens2]

Here's a script that should do what you're after:

>>> newLines = []
... points = "grid_label"
... angleField = "OID"
... lineLength = 300
... sr = arcpy.Describe(points).spatialReference
... with arcpy.da.SearchCursor(points,["SHAPE@",angleField],spatial_reference=sr) as cursor:
...     for row in cursor:
...         x1 = row[0].centroid.X + (math.sin(math.radians(row[1]))*(lineLength/2))
...         y1 = row[0].centroid.Y + (math.cos(math.radians(row[1]))*(lineLength/2))
...         x2 = row[0].centroid.X - (math.sin(math.radians(row[1]))*(lineLength/2))
...         y2 = row[0].centroid.Y - (math.cos(math.radians(row[1]))*(lineLength/2))
...         newLine = arcpy.Polyline(arcpy.Array([arcpy.Point(x1,y1),arcpy.Point(x2,y2)]),sr)
...         newLines.append(newLine)
... arcpy.CopyFeatures_management(newLines,r'in_memory\lines')

[KristineMuma]

Thanks Darren! I am so new to Python I knew I didn't have time to attempt to figure it out on my own. I can't wait to try this....

>>> Darren Wiens <geonet@esri.com> 7/24/2015 4:29 PM >>>

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Can I place a line on a point using an attribute for the angle?

reply from Darren Wiens

( https://community.esri.com/people/dkwiens?et=watches.email.thread) in Developers - View the full discussion

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Here's a script that should do what you're after:

>>> newLines = []

... points = "grid_label"

... angleField = "OID"

... lineLength = 300

... sr = arcpy.Describe(points).spatialReference

... with arcpy.da.SearchCursor(points,["SHAPE@",angleField]) as cursor:

... for row in cursor:

... x1 = row[0].centroid.X + (math.sin(math.radians(row[1]))*(lineLength/2))

... y1 = row[0].centroid.Y + (math.cos(math.radians(row[1]))*(lineLength/2))

... x2 = row[0].centroid.X - (math.sin(math.radians(row[1]))*(lineLength/2))

... y2 = row[0].centroid.Y - (math.cos(math.radians(row[1]))*(lineLength/2))

... newLine = arcpy.Polyline(arcpy.Array())

... newLines.append(newLine)

... arcpy.CopyFeatures_management(newLines,r'in_memory\lines')

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