On Sat, 3 Nov 2018, Rich Shepard wrote:
v.colors -c map=stations use=attr column=site_nbr rgb_col=bin_col --o
Writing color rules...
ERROR: Data type of RGB column <bin_col> must be char
Where have I made the syntactical mistake?
I slightly modified the command to use a different column:
v.colors -c map=stations use=attr column=howmany rgb_col=bin_col --o
Writing color rules...
ERROR: Data type of RGB column <bin_col> must be char
Checking that grass saw the postgres table:
db.connect -p
driver: pg
database: willamette-river-hg
schema:
group:
Yep, it does.
Looking at the table structure:
db.describe table=stations
table:stations
description:
insert:?
delete:?
ncols:10
nrows:82
...
column:howmany
description:
type:INTEGER
len:4
scale:0
precision:0
default:
nullok:yes
select:?
update:?
column:bin_col
description:
type:CHARACTER
len:12
scale:0
precision:0
default:
nullok:yes
select:?
update:?
So, why does grass tell me the bin_col column needs to be CHAR when it is
(unless grass differentiates between char and CHARACTER.)
Rich
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