Perpendicular Transects (Ferreira)

December 2014
Our man in Brazil, Mateus Ferreira, has built an Arc10-compatible toolbox called Transect Tool that creates perpendicular transects across a streamline (polyline). Thanks Mateus!

transect tool

Transect Tool for ArcGIS 10 by Mateus Ferreira. Streamlines may be split at user-defined distances or at vertices (bends) in the streamline. Click for larger image.

 

 

 

 

 

 

 

 

 


Download Transect Tool
–> Transect Tool
Updated December 2014

“Some user reported troubles in use transect tool. I think are problems with Model Builder. Then I changed the tool to a Python code. I changed also the way how to split the line in the same distance. I used a code from here http://www.maprantala.com/2011/05/01/quick-dirty-arcpy-batch-splitting-polylines-to-a-specific-length/ to do this. I think the tool is working better now.”  – M. Ferreira, 5Dec2014

Contact the tool’s creator with questions:
Mateus Ferreira (mateusvidotti “at” yahoo.com.br)

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Pre-Mateus Workflow Concept by SWC
a.) Input a polyline (a stream centerline)
b.) Segment it at a fixed interval that I specify or segment at the bends (vertices) in the polyline
c.) Convert the segments to points (segment midpoints or endpoints)
d.) Convert these points to perpendicular lines of a length that I specify. Preferably, the lines would have just 2 endpoints (no midpoint vertex).
e.) From there, the transects may be converted to endpoints and elevations extracted, create 3D profiles along these lines, or whatever.

Below are the partial solutions I have found online.

http://gis.stackexchange.com/questions/25368/splitting-lines-automatically-at-specific-distances

http://gis.stackexchange.com/questions/20855/arcgis10-create-perpendicular-transects-to-stream-at-specified-intervals

http://resources.arcgis.com/gallery/file/geoprocessing/details?entryID=2552FE79-1422-2418-342E-6394F81D5E48

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//001t00000029000000.htm

http://gis.stackexchange.com/questions/48723/perpendicular-lines-at-start-and-end-of-a-line

http://gis.stackexchange.com/questions/29932/divide-line-into-sections-using-points-offset-from-it

http://gis.stackexchange.com/questions/54815/how-to-create-perpendicular-line-from-point-on-one-line-to-an-intersection-with

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