Export Line Geometry?

Question

Hello All,

I'm trying to do some external analysis on a line that I have in ArcGIS. In order to do this, I need to export the line geometry so that I can see the line as a series of 'nodes'. Is there any way to find and export these nodes to a csv format? I know this is possible with QGIS so I expect its possible in ArcGIS as well... but I just can't seem to find it.

I also don't really need it in a csv, basically I need to run these points through a matlab script to calculate curvature ( I find that ArcGIS Curves and Lines tool isn't particularly useful for what I'm trying to do), so as long as these points are in a format that Matlab can read, I'm happy.

Any tips or help is appreciated!

Thanks,

Zach

bixb0012 · Answer

I like Dan Patterson‌'s suggestion/approach more: >>> line_fc = # path to line feature class >>> points = arcpy.da.FeatureClassToNumPyArray( ... line_fc, ... ["OID@", "SHAPE@X", "SHAPE@Y"], ... explode_to_points=True ... ) ... >>> ‍‍‍‍‍‍‍‍

bixb0012 · Answer

Something like the following will create a list of named tuples for all of the points that make up the vertices for all of the lines in a polyline feature class: >>> from collections import namedtuple >>> >>> line_fc = # path to line feature class >>> point_record = namedtuple('point_record','line_oid x y') >>> points = [] >>> with arcpy.da.SearchCursor(line_fc,["OID@","SHAPE@"]) as cur: ... for oid, shape in cur: ... points.extend([ ... point_record(oid, point.X, point.Y) ... for part in shape.getPart() ... for point in part ... ]) ... >>> ‍‍‍‍‍‍‍‍‍‍‍‍‍‍ You can take the list of named tuples and either write it out to CSV or using an insert cursor to create a table or something else.

DanPatterson_Retired · Answer

you can use the free stuff provided by esri if you know a bit of python. FeatureclassToNumPyArray then save the coordinates out from numpy/python using savetxt.  Gives you a nice file which you can then use anywhere