Re: [Qgis-user] Problem running GRASS r.lake from Qgis

2021-02-24 Thread David Strip 

  
  
I ran the same data in QGIS 3.10.5 and it ran without problems. 


On 2/24/2021 3:51 PM, David Strip wrote:

  
  Qgis 3.16.2, GRASS 7.8.4, Win 10.
  
  I'm attempting to run the r.lake processing algorithm. If I select
  "Temporary layer" for output, or specify a new file, I get and
  error - "grass r.lake The following layers were not correctly
  generated.". I believe this is because the script always specifies
  --overwrite,
  which apparently fails if the file doesn't
  already exist. 
  I then try to run specifying a file that already exists. This
  file is a copy of the input DEM layer used to run the
  algorithm ,so it has the same properties as the input layer.
  The algorithm runs to completion and adds the new layer to the
  map, but it is appears to be the same  as the file that was
  supposed to be overwritten.
  
  My input layer can be found here.
  I load the file into a empty project. CRS is 4269
  I select r.lake
  Select the only layer as the Elevation input
  Set Water level =2500
  Select a seed - The value of the DEM surface at
  the seed point is around 2000.
  Select
  an existing file for output
  Accept all other defaults, run algorithm.
  
  The dump of the script parameters is:

  


{ '-n' : False, 'GRASS_RASTER_FORMAT_META' : '', 'GRASS_RASTER_FORMAT_OPT' : '', 'GRASS_REGION_CELLSIZE_PARAMETER' : 0, 'GRASS_REGION_PARAMETER' : None, 'coordinates' : '-106.503588,36.309857 [EPSG:4269]', 'elevation' : 'C:/Users/David/Documents/Geodata/Topo maps/Abiquiu/USGS_13_n37w107.tif', 'lake' : 'C:/Users/David/Documents/Geodata/geoTemp/lake2.tif', 'seed' : None, 'water_level' : 2500 }


  
  I've run this with the original input file in EPSG:4269, and against the same file converted to UTM13N - EPSG: 26913 - same results in either case.
  

  What am I misunderstanding about how to run this?
Thx.
  

  David
  

  

   
  
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[Qgis-user] Problem running GRASS r.lake from Qgis

2021-02-24 Thread David Strip 

  
  
Qgis 3.16.2, GRASS 7.8.4, Win 10.

I'm attempting to run the r.lake processing algorithm. If I select
"Temporary layer" for output, or specify a new file, I get and error
- "grass r.lake The following layers were not correctly generated.".
I believe this is because the script always specifies --overwrite, which
apparently fails if the file doesn't already exist. 
I then try to run specifying a file that already exists. This
file is a copy of the input DEM layer used to run the algorithm
,so it has the same properties as the input layer. The algorithm
runs to completion and adds the new layer to the map, but it is
appears to be the same  as the file that was supposed to be
overwritten.

My input layer can be found here.
I load the file into a empty project. CRS is 4269
I select r.lake
Select the only layer as the Elevation input
Set Water level =2500
Select a seed - The value of the DEM surface at
the seed point is around 2000.
Select
an existing file for output
Accept all other defaults, run algorithm.

The dump of the script parameters is:
  

  

  { '-n' : False, 'GRASS_RASTER_FORMAT_META' : '', 'GRASS_RASTER_FORMAT_OPT' : '', 'GRASS_REGION_CELLSIZE_PARAMETER' : 0, 'GRASS_REGION_PARAMETER' : None, 'coordinates' : '-106.503588,36.309857 [EPSG:4269]', 'elevation' : 'C:/Users/David/Documents/Geodata/Topo maps/Abiquiu/USGS_13_n37w107.tif', 'lake' : 'C:/Users/David/Documents/Geodata/geoTemp/lake2.tif', 'seed' : None, 'water_level' : 2500 }
  


I've run this with the original input file in EPSG:4269, and against the same file converted to UTM13N - EPSG: 26913 - same results in either case.


What am I misunderstanding about how to run this?
Thx.


David



  

  

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