topic Re: Creating a polyline from a start to end point, following points of the same elevation in Python Questions

Creating a polyline from a start to end point, following points of the same elevation

SimbarasheKapfumo — Sun, 06 May 2018 10:24:31 GMT

How are you people . I have an interesting question which i hope u might help me with .

I have a DEM and two point shapefiles. I want to draw a line from point 1 in shapefile 1 to any point in shapefile 2 which has the same elevation with point 1. The line should follow points of the same elevation in the DEM hence the line will likely be an winding line rather than a straight one.

Thank you for your time.

Re: Creating a polyline from a start to end point, following points of the same elevation

DanPatterson_Retired — Sun, 06 May 2018 11:42:41 GMT

Contour list .... or even contour, then convert to polylines.

Finally, intersect with your points using Split at point and keep the bits you want

Re: Creating a polyline from a start to end point, following points of the same elevation

SimbarasheKapfumo — Sun, 06 May 2018 16:56:49 GMT

Thank you . Its a very long process though because i had to do some clean up to remove the other unwanted contours ..

Re: Creating a polyline from a start to end point, following points of the same elevation

DanPatterson_Retired — Sun, 06 May 2018 17:00:48 GMT

Or if the number is smaller, select the ones you want and make a new featureclass from them

Re: Creating a polyline from a start to end point, following points of the same elevation

DanPatterson_Retired — Sun, 06 May 2018 21:19:31 GMT

Do you have an image of the input and final result?

Re: Creating a polyline from a start to end point, following points of the same elevation

SimbarasheKapfumo — Tue, 08 May 2018 12:12:23 GMT

still writing code to select the wanted lines. there a lot of conditions the lines have to meet and there are a lot of lines.

Re: Creating a polyline from a start to end point, following points of the same elevation

SimbarasheKapfumo — Sat, 11 Dec 2021 20:49:23 GMT

is there any way of writing the statement below in arcpy

arcpy.gp.RasterCalculator_sa("(\"%FlowAcc%\" > 5000)", Rstream)
i want to select values greater than 5000 in Flow Accumulation raster (FlowAcc) and save them to Rstream .
when i put it in python it returned an error : 'int' object has no attribute 'save

Re: Creating a polyline from a start to end point, following points of the same elevation

DanPatterson_Retired — Tue, 08 May 2018 14:00:05 GMT

You have to provide the raster's name... right now the "\Flo..." stuff is an integer I bet and Rstream needs to be a filename

Re: Creating a polyline from a start to end point, following points of the same elevation

SimbarasheKapfumo — Tue, 08 May 2018 14:39:35 GMT

Rstream is a file. the code is so long i just shorted it. But whole code is almost the same as the 1 i used and it worked well

arcpy.gp.RasterCalculator_sa("Con(\"%Fill (2)%\" == \"%ZonalStast_Max%\",\"%Fill (2)%\")", MaxRasterPoints)