problems with v.net.flow in QGIS/GRASS GIS
CLI: Get information Ubuntu releases
Does fire aspect on a sword, destroy mob drops?
Writing in a Christian voice
Single word to change groups
What are the consequences of changing the number of hours in a day?
Output visual diagram of picture
What kind of footwear is suitable for walking in micro gravity environment?
How to find the largest number(s) in a list of elements, possibly non-unique?
Why is "la Gestapo" feminine?
Print last inputted byte
Does the Shadow Magic sorcerer's Eyes of the Dark feature work on all Darkness spells or just his/her own?
Emojional cryptic crossword
Exposing a company lying about themselves in a tightly knit industry: Is my career at risk on the long run?
Did Nintendo change its mind about 68000 SNES?
How can a new country break out from a developed country without war?
Can "few" be used as a subject? If so, what is the rule?
What is 管理しきれず?
Can a university suspend a student even when he has left university?
is this saw blade faulty?
How can an organ that provides biological immortality be unable to regenerate?
PTIJ: At the Passover Seder, is one allowed to speak more than once during Maggid?
Why is participating in the European Parliamentary elections used as a threat?
Gauss brackets with double vertical lines
Jem'Hadar, something strange about their life expectancy
problems with v.net.flow in QGIS/GRASS GIS
When I try to use the v.net.flow tool in QGIS, the output datasets have a value of 0 for every feature in the flow column. almost every other v.net tool works, such as v.net.steiner and v.net.distance. how do I get the v.net.flow tool to actually output the proper values? I have attached the log below.
Processing algorithm… Algorithm 'v.net.flow' starting… Input
parameters: { 'GRASS_MIN_AREA_PARAMETER' : 0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER' : 0, 'GRASS_REGION_PARAMETER' : None,
'GRASS_SNAP_TOLERANCE_PARAMETER' : -1, 'GRASS_VECTOR_DSCO' : '',
'GRASS_VECTOR_EXPORT_NOCAT' : True, 'GRASS_VECTOR_LCO' : '-r',
'arc_backward_column' : None, 'arc_column' : 'Shape_Leng', 'cut' :
'F:/Work Stuff/SteinerTree/Steiner/Section 4/cut.shp', 'input' :
'F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp|layername=NETWORK3TRY',
'node_column' : None, 'output' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp', 'points' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 5/Section5.shp', 'sink_cats' : '',
'sink_where' : 'TYPE = 0', 'source_cats' : '', 'source_where' : 'TYPE
= 1', 'threshold' : 50 }
g.proj -c proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999
+x_0=304800 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" v.in.ogr min_area=0.0001 snap=-1.0 input="F:Work StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerSection 5Section5.shp"
output="vector_5c906e50cfc9824" --overwrite -o g.region
n=5027309.435160724 s=5024626.0554929385 e=363198.1515355515
w=360651.9582503296 v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 v.db.connect -o
map=net5c906e50d046625 table=vector_5c906e50cfc9824 layer=2 v.net.flow
input=net5c906e50d046625 source_where="TYPE = 1" sink_where="TYPE = 0"
arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite v.out.ogr
type="line" input="outpute1098a53ef12487c97f2a35692f70e87"
output="F:/Work Stuff/SteinerTree/Steiner/Section 4/flow.shp"
format="ESRI_Shapefile" layer=1 -c --overwrite v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite Starting GRASS GIS... WARNING: Concurrent
mapset locking is not supported on Windows Executing
... C:OSGEO4~1bin>chcp 1252 1>NUL C:OSGEO4~1bin>g.proj -c
proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999 +x_0=304800 +y_0=0
+ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" Default region was updated to the new projection, but if you have multiple mapsets
g.region -dshould be run in each to update the region from the
default Projection information updated C:OSGEO4~1bin>v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o Over-riding projection
check Check if OGR layer contains polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Column name
renamed to Importing 8460 features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>v.in.ogr min_area=0.0001
snap=-1.0 input="F:Work StuffSteinerTreeSteinerSection
5Section5.shp" output="vector_5c906e50cfc9824" --overwrite -o
Over-riding projection check Check if OGR layer contains
polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Importing 888
features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>g.region n=5027309.435160724
s=5024626.0554929385 e=363198.1515355515 w=360651.9582503296
C:OSGEO4~1bin>v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 Copying features...
2..5..8..11..14..17..20..23..26..29..32..35..38..41..44..47..50..53..56..59..62..65..68..71..74..77..80..83..86..89..92..95..98..100 Building topology for vector map ...
Registering primitives... Copying attributes... Building topology for
vector map ... Registering primitives...
v.net complete. 0 lines (network arcs) written to output.
C:OSGEO4~1bin>v.db.connect -o map=net5c906e50d046625
table=vector_5c906e50cfc9824 layer=2 The table
is now part of vector map
and may be deleted or overwritten by GRASS
modules Select privileges were granted on the table
C:OSGEO4~1bin>v.net.flow input=net5c906e50d046625 source_where="TYPE
= 1" sink_where="TYPE = 0" arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite Building graph...
Registering arcs...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Flattening the graph... Graph was built Writing the output...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Building topology for vector map
... Registering
primitives... Building topology for vector map
... Registering
primitives... C:OSGEO4~1bin>v.out.ogr type="line"
input="outpute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: 888 points found, but not requested to
be exported. Verify 'type' parameter. Exporting 8460 features...
5..11..17..23..29..35..41..47..53..59..65..71..77..83..89..95..100 v.out.ogr complete. 8460 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: No lines found, but requested to be
exported. Will skip this feature type. WARNING: No attribute table
found -> using only category numbers as attributes Exporting 0
features... WARNING: Output layer is empty, no features written
v.out.ogr complete. 0 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>exit Execution of
finished. Cleaning up default sqlite database ... Cleaning up
temporary files... Execution completed in 20.03 seconds Results:
{'cut': , 'output':
}
Loading resulting layers Algorithm 'v.net.flow' finished
qgis grass network
asked 1 min ago
AlexAlex
627
add a comment |
When I try to use the v.net.flow tool in QGIS, the output datasets have a value of 0 for every feature in the flow column. almost every other v.net tool works, such as v.net.steiner and v.net.distance. how do I get the v.net.flow tool to actually output the proper values? I have attached the log below.
Processing algorithm… Algorithm 'v.net.flow' starting… Input
parameters: { 'GRASS_MIN_AREA_PARAMETER' : 0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER' : 0, 'GRASS_REGION_PARAMETER' : None,
'GRASS_SNAP_TOLERANCE_PARAMETER' : -1, 'GRASS_VECTOR_DSCO' : '',
'GRASS_VECTOR_EXPORT_NOCAT' : True, 'GRASS_VECTOR_LCO' : '-r',
'arc_backward_column' : None, 'arc_column' : 'Shape_Leng', 'cut' :
'F:/Work Stuff/SteinerTree/Steiner/Section 4/cut.shp', 'input' :
'F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp|layername=NETWORK3TRY',
'node_column' : None, 'output' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp', 'points' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 5/Section5.shp', 'sink_cats' : '',
'sink_where' : 'TYPE = 0', 'source_cats' : '', 'source_where' : 'TYPE
= 1', 'threshold' : 50 }
g.proj -c proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999
+x_0=304800 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" v.in.ogr min_area=0.0001 snap=-1.0 input="F:Work StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerSection 5Section5.shp"
output="vector_5c906e50cfc9824" --overwrite -o g.region
n=5027309.435160724 s=5024626.0554929385 e=363198.1515355515
w=360651.9582503296 v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 v.db.connect -o
map=net5c906e50d046625 table=vector_5c906e50cfc9824 layer=2 v.net.flow
input=net5c906e50d046625 source_where="TYPE = 1" sink_where="TYPE = 0"
arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite v.out.ogr
type="line" input="outpute1098a53ef12487c97f2a35692f70e87"
output="F:/Work Stuff/SteinerTree/Steiner/Section 4/flow.shp"
format="ESRI_Shapefile" layer=1 -c --overwrite v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite Starting GRASS GIS... WARNING: Concurrent
mapset locking is not supported on Windows Executing
... C:OSGEO4~1bin>chcp 1252 1>NUL C:OSGEO4~1bin>g.proj -c
proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999 +x_0=304800 +y_0=0
+ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" Default region was updated to the new projection, but if you have multiple mapsets
g.region -dshould be run in each to update the region from the
default Projection information updated C:OSGEO4~1bin>v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o Over-riding projection
check Check if OGR layer contains polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Column name
renamed to Importing 8460 features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>v.in.ogr min_area=0.0001
snap=-1.0 input="F:Work StuffSteinerTreeSteinerSection
5Section5.shp" output="vector_5c906e50cfc9824" --overwrite -o
Over-riding projection check Check if OGR layer contains
polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Importing 888
features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>g.region n=5027309.435160724
s=5024626.0554929385 e=363198.1515355515 w=360651.9582503296
C:OSGEO4~1bin>v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 Copying features...
2..5..8..11..14..17..20..23..26..29..32..35..38..41..44..47..50..53..56..59..62..65..68..71..74..77..80..83..86..89..92..95..98..100 Building topology for vector map ...
Registering primitives... Copying attributes... Building topology for
vector map ... Registering primitives...
v.net complete. 0 lines (network arcs) written to output.
C:OSGEO4~1bin>v.db.connect -o map=net5c906e50d046625
table=vector_5c906e50cfc9824 layer=2 The table
is now part of vector map
and may be deleted or overwritten by GRASS
modules Select privileges were granted on the table
C:OSGEO4~1bin>v.net.flow input=net5c906e50d046625 source_where="TYPE
= 1" sink_where="TYPE = 0" arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite Building graph...
Registering arcs...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Flattening the graph... Graph was built Writing the output...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Building topology for vector map
... Registering
primitives... Building topology for vector map
... Registering
primitives... C:OSGEO4~1bin>v.out.ogr type="line"
input="outpute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: 888 points found, but not requested to
be exported. Verify 'type' parameter. Exporting 8460 features...
5..11..17..23..29..35..41..47..53..59..65..71..77..83..89..95..100 v.out.ogr complete. 8460 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: No lines found, but requested to be
exported. Will skip this feature type. WARNING: No attribute table
found -> using only category numbers as attributes Exporting 0
features... WARNING: Output layer is empty, no features written
v.out.ogr complete. 0 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>exit Execution of
finished. Cleaning up default sqlite database ... Cleaning up
temporary files... Execution completed in 20.03 seconds Results:
{'cut': , 'output':
}
Loading resulting layers Algorithm 'v.net.flow' finished
qgis grass network
asked 1 min ago
AlexAlex
627
add a comment |
When I try to use the v.net.flow tool in QGIS, the output datasets have a value of 0 for every feature in the flow column. almost every other v.net tool works, such as v.net.steiner and v.net.distance. how do I get the v.net.flow tool to actually output the proper values? I have attached the log below.
Processing algorithm… Algorithm 'v.net.flow' starting… Input
parameters: { 'GRASS_MIN_AREA_PARAMETER' : 0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER' : 0, 'GRASS_REGION_PARAMETER' : None,
'GRASS_SNAP_TOLERANCE_PARAMETER' : -1, 'GRASS_VECTOR_DSCO' : '',
'GRASS_VECTOR_EXPORT_NOCAT' : True, 'GRASS_VECTOR_LCO' : '-r',
'arc_backward_column' : None, 'arc_column' : 'Shape_Leng', 'cut' :
'F:/Work Stuff/SteinerTree/Steiner/Section 4/cut.shp', 'input' :
'F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp|layername=NETWORK3TRY',
'node_column' : None, 'output' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp', 'points' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 5/Section5.shp', 'sink_cats' : '',
'sink_where' : 'TYPE = 0', 'source_cats' : '', 'source_where' : 'TYPE
= 1', 'threshold' : 50 }
g.proj -c proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999
+x_0=304800 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" v.in.ogr min_area=0.0001 snap=-1.0 input="F:Work StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerSection 5Section5.shp"
output="vector_5c906e50cfc9824" --overwrite -o g.region
n=5027309.435160724 s=5024626.0554929385 e=363198.1515355515
w=360651.9582503296 v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 v.db.connect -o
map=net5c906e50d046625 table=vector_5c906e50cfc9824 layer=2 v.net.flow
input=net5c906e50d046625 source_where="TYPE = 1" sink_where="TYPE = 0"
arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite v.out.ogr
type="line" input="outpute1098a53ef12487c97f2a35692f70e87"
output="F:/Work Stuff/SteinerTree/Steiner/Section 4/flow.shp"
format="ESRI_Shapefile" layer=1 -c --overwrite v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite Starting GRASS GIS... WARNING: Concurrent
mapset locking is not supported on Windows Executing
... C:OSGEO4~1bin>chcp 1252 1>NUL C:OSGEO4~1bin>g.proj -c
proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999 +x_0=304800 +y_0=0
+ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" Default region was updated to the new projection, but if you have multiple mapsets
g.region -dshould be run in each to update the region from the
default Projection information updated C:OSGEO4~1bin>v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o Over-riding projection
check Check if OGR layer contains polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Column name
renamed to Importing 8460 features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>v.in.ogr min_area=0.0001
snap=-1.0 input="F:Work StuffSteinerTreeSteinerSection
5Section5.shp" output="vector_5c906e50cfc9824" --overwrite -o
Over-riding projection check Check if OGR layer contains
polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Importing 888
features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>g.region n=5027309.435160724
s=5024626.0554929385 e=363198.1515355515 w=360651.9582503296
C:OSGEO4~1bin>v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 Copying features...
2..5..8..11..14..17..20..23..26..29..32..35..38..41..44..47..50..53..56..59..62..65..68..71..74..77..80..83..86..89..92..95..98..100 Building topology for vector map ...
Registering primitives... Copying attributes... Building topology for
vector map ... Registering primitives...
v.net complete. 0 lines (network arcs) written to output.
C:OSGEO4~1bin>v.db.connect -o map=net5c906e50d046625
table=vector_5c906e50cfc9824 layer=2 The table
is now part of vector map
and may be deleted or overwritten by GRASS
modules Select privileges were granted on the table
C:OSGEO4~1bin>v.net.flow input=net5c906e50d046625 source_where="TYPE
= 1" sink_where="TYPE = 0" arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite Building graph...
Registering arcs...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Flattening the graph... Graph was built Writing the output...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Building topology for vector map
... Registering
primitives... Building topology for vector map
... Registering
primitives... C:OSGEO4~1bin>v.out.ogr type="line"
input="outpute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: 888 points found, but not requested to
be exported. Verify 'type' parameter. Exporting 8460 features...
5..11..17..23..29..35..41..47..53..59..65..71..77..83..89..95..100 v.out.ogr complete. 8460 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: No lines found, but requested to be
exported. Will skip this feature type. WARNING: No attribute table
found -> using only category numbers as attributes Exporting 0
features... WARNING: Output layer is empty, no features written
v.out.ogr complete. 0 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>exit Execution of
finished. Cleaning up default sqlite database ... Cleaning up
temporary files... Execution completed in 20.03 seconds Results:
{'cut': , 'output':
}
Loading resulting layers Algorithm 'v.net.flow' finished
qgis grass network
asked 1 min ago
AlexAlex
627
When I try to use the v.net.flow tool in QGIS, the output datasets have a value of 0 for every feature in the flow column. almost every other v.net tool works, such as v.net.steiner and v.net.distance. how do I get the v.net.flow tool to actually output the proper values? I have attached the log below.
Processing algorithm… Algorithm 'v.net.flow' starting… Input
parameters: { 'GRASS_MIN_AREA_PARAMETER' : 0.0001,
'GRASS_OUTPUT_TYPE_PARAMETER' : 0, 'GRASS_REGION_PARAMETER' : None,
'GRASS_SNAP_TOLERANCE_PARAMETER' : -1, 'GRASS_VECTOR_DSCO' : '',
'GRASS_VECTOR_EXPORT_NOCAT' : True, 'GRASS_VECTOR_LCO' : '-r',
'arc_backward_column' : None, 'arc_column' : 'Shape_Leng', 'cut' :
'F:/Work Stuff/SteinerTree/Steiner/Section 4/cut.shp', 'input' :
'F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp|layername=NETWORK3TRY',
'node_column' : None, 'output' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp', 'points' : 'F:/Work
Stuff/SteinerTree/Steiner/Section 5/Section5.shp', 'sink_cats' : '',
'sink_where' : 'TYPE = 0', 'source_cats' : '', 'source_where' : 'TYPE
= 1', 'threshold' : 50 }
g.proj -c proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999
+x_0=304800 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" v.in.ogr min_area=0.0001 snap=-1.0 input="F:Work StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerSection 5Section5.shp"
output="vector_5c906e50cfc9824" --overwrite -o g.region
n=5027309.435160724 s=5024626.0554929385 e=363198.1515355515
w=360651.9582503296 v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 v.db.connect -o
map=net5c906e50d046625 table=vector_5c906e50cfc9824 layer=2 v.net.flow
input=net5c906e50d046625 source_where="TYPE = 1" sink_where="TYPE = 0"
arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite v.out.ogr
type="line" input="outpute1098a53ef12487c97f2a35692f70e87"
output="F:/Work Stuff/SteinerTree/Steiner/Section 4/flow.shp"
format="ESRI_Shapefile" layer=1 -c --overwrite v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite Starting GRASS GIS... WARNING: Concurrent
mapset locking is not supported on Windows Executing
... C:OSGEO4~1bin>chcp 1252 1>NUL C:OSGEO4~1bin>g.proj -c
proj4="+proj=tmerc +lat_0=0 +lon_0=-76.5 +k=0.9999 +x_0=304800 +y_0=0
+ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs" Default region was updated to the new projection, but if you have multiple mapsets
g.region -dshould be run in each to update the region from the
default Projection information updated C:OSGEO4~1bin>v.in.ogr
min_area=0.0001 snap=-1.0 input="F:Work
StuffSteinerTreeSteinerNETWORK3TRY.shp" layer="NETWORK3TRY"
output="vector_5c906e50cfc9823" --overwrite -o Over-riding projection
check Check if OGR layer contains polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Column name
renamed to Importing 8460 features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>v.in.ogr min_area=0.0001
snap=-1.0 input="F:Work StuffSteinerTreeSteinerSection
5Section5.shp" output="vector_5c906e50cfc9824" --overwrite -o
Over-riding projection check Check if OGR layer contains
polygons...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100 Creating attribute table for layer ... Importing 888
features (OGR layer )...
0..2..4..6..8..10..12..14..16..18..20..22..24..26..28..30..32..34..36..38..40..42..44..46..48..50..52..54..56..58..60..62..64..66..68..70..72..74..76..78..80..82..84..86..88..90..92..94..96..98..100
----------------------------------------------------- Building topology for vector map ...
Registering primitives... C:OSGEO4~1bin>g.region n=5027309.435160724
s=5024626.0554929385 e=363198.1515355515 w=360651.9582503296
C:OSGEO4~1bin>v.net -s input=vector_5c906e50cfc9823
points=vector_5c906e50cfc9824 output=net5c906e50d046625
operation=connect threshold=50.0 Copying features...
2..5..8..11..14..17..20..23..26..29..32..35..38..41..44..47..50..53..56..59..62..65..68..71..74..77..80..83..86..89..92..95..98..100 Building topology for vector map ...
Registering primitives... Copying attributes... Building topology for
vector map ... Registering primitives...
v.net complete. 0 lines (network arcs) written to output.
C:OSGEO4~1bin>v.db.connect -o map=net5c906e50d046625
table=vector_5c906e50cfc9824 layer=2 The table
is now part of vector map
and may be deleted or overwritten by GRASS
modules Select privileges were granted on the table
C:OSGEO4~1bin>v.net.flow input=net5c906e50d046625 source_where="TYPE
= 1" sink_where="TYPE = 0" arc_column=Shape_Leng output=outpute1098a53ef12487c97f2a35692f70e87
cut=cute1098a53ef12487c97f2a35692f70e87 --overwrite Building graph...
Registering arcs...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Flattening the graph... Graph was built Writing the output...
1..3..5..7..9..11..13..15..17..19..21..23..25..27..29..31..33..35..37..39..41..43..45..47..49..51..53..55..57..59..61..63..65..67..69..71..73..75..77..79..81..83..85..87..89..91..93..95..97..99..100 Building topology for vector map
... Registering
primitives... Building topology for vector map
... Registering
primitives... C:OSGEO4~1bin>v.out.ogr type="line"
input="outpute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/flow.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: 888 points found, but not requested to
be exported. Verify 'type' parameter. Exporting 8460 features...
5..11..17..23..29..35..41..47..53..59..65..71..77..83..89..95..100 v.out.ogr complete. 8460 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>v.out.ogr type="line"
input="cute1098a53ef12487c97f2a35692f70e87" output="F:/Work
Stuff/SteinerTree/Steiner/Section 4/cut.shp" format="ESRI_Shapefile"
layer=1 -c --overwrite WARNING: No lines found, but requested to be
exported. Will skip this feature type. WARNING: No attribute table
found -> using only category numbers as attributes Exporting 0
features... WARNING: Output layer is empty, no features written
v.out.ogr complete. 0 features (Line String type) written to
(ESRI_Shapefile format).
C:OSGEO4~1bin>exit Execution of
finished. Cleaning up default sqlite database ... Cleaning up
temporary files... Execution completed in 20.03 seconds Results:
{'cut': , 'output':
}
Loading resulting layers Algorithm 'v.net.flow' finished
qgis grass network
qgis grass network
asked 1 min ago
AlexAlex
627
asked 1 min ago
AlexAlex
627
asked 1 min ago
AlexAlex
627
asked 1 min ago
AlexAlex
627
asked 1 min ago
AlexAlex
627
627
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "79"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fgis.stackexchange.com%2fquestions%2f315913%2fproblems-with-v-net-flow-in-qgis-grass-gis%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Geographic Information Systems Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fgis.stackexchange.com%2fquestions%2f315913%2fproblems-with-v-net-flow-in-qgis-grass-gis%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
