[GRASS-user] r.water.outlet: no map displayed

[Rich Shepard]

On Mon, 3 Oct 2016, Markus Neteler wrote:

> The r.lfp addon is perhaps also interesting here:
> https://grass.osgeo.org/grass70/manuals/addons/r.lfp.html

Markus,

   Installed r.stream.distance, then r.lfp. Results:

> r.lfp in=drainage out=lfp coord=2295821.27858,175258.094514
Scanning input for column types...
Number of columns: 2
Number of rows: 1
Importing points...
  100%
Building topology for vector map <r_lfp_525_outlet at analyses>...
Registering primitives...
One primitive registered
One vertex registered
Building areas...
  100%
0 areas built
0 isles built
Attaching islands...
Attaching centroids...
  100%
Number of nodes: 0
Number of primitives: 1
Number of points: 1
Number of lines: 0
Number of boundaries: 0
Number of centroids: 0
Number of areas: 0
Number of isles: 0
Reading features...
  100%
Writing raster map...
  100%
v.to.rast complete.
Calculating segments in direction <DOWNSTREAM> (may take some time)...
Reading raster map <r_lfp_525_outlet>...
  100%
Reading raster map <drainage>...
  100%
Finding nodes...
Calculate downstream parameters...
  100%
Writing raster map <r_lfp_525_flds>...
  100%
All in RAM calculation - method <UPSTREAM>...
Reading raster map <r_lfp_525_outlet>...
  100%
Reading raster map <drainage>...
  100%
Finding nodes...
Calculate upstream parameters...
  100%
Writing raster map <r_lfp_525_flus>...
  100%
  100%
Invalid map <nan>
Parse error
ERROR: parse error
ERROR: Cannot create longest flow path raster map

   Perhaps this is a clue about what changed from Saturday to Sunday? I
suppose that I can (again) completely re-project from the feet location to
the meters location, but that takes many hours for the basic LiDAR DEMs
(bare earth and highest hit).

Rich