I have created a set of flowlines using the Fill, Flow Direction, Flow Accumulation, and Reclass tools (in that order) from the spatial analyst toolbox in 10.3.1. I then converted them to polylines from the original raster data. When I looked at my flow directions in the vector data, they were all going uphill. I would like some help trying to figure out what I did wrong. Thank you.
Neeraj, I responded to your request for data last Friday in an email. My email server shows that it was sent. Have you been able to have a look at it? I communicated with you via regular email rather then through this thread since I do not see a way to attach file from this interface.
I just got an email 5 minutes ago saying that my message was undeliverable due to the file size. I am not sure why it took almost a week to get that message....I will try splitting the data up and resending. I don't think I could make the subset any smaller and still have it be useful.
No I haven't received any emails from you. Unfortunately I do not have access to an ftp site. You could try Google Drive maybe?
As I has mentioned earlier, a way to send me a small raster (few MBs) would be to:
"Could you please clip(Extract by mask) the flow direction output raster & input elevation raster, for a region where you can see that it is backwards? If you could send that, it might be sufficient enough for me to reproduce what you are seeing."
Thanks to Neeraj who helped find the ultimate solution to my issue! I should have been using the Stream to Feature tool to convert my raster flowlines to vector flowlines. What caused the flowlines to have a strange output (where they were flowing uphill) was that I had used the Raster to Polyline tool which, as it turns out, is not a good choice for creating flowlines.
