If topology info is not available (i.e., vector map cannot be opened on level 2), vector map extends and number of features need to be counted on the fly which may take some time.
Note that the flag -c only works when the vector map is connected to one or several attribute table(s). This connection can be shown or set with v.db.connect.
v.info map=geology +----------------------------------------------------------------------------+ | Name: geology | | Mapset: PERMANENT | | Project: nc_spm_08 | | Database: /home/martin/grassdata | | Title: North Carolina geology map (polygon map) | | Map scale: 1:1 | | Map format: native | | Name of creator: helena | | Organization: NC OneMap | | Source date: Mon Nov 6 15:48:53 2006 | |----------------------------------------------------------------------------| | Type of map: vector (level: 2) | | | | Number of points: 0 Number of centroids: 1832 | | Number of lines: 0 Number of boundaries: 3649 | | Number of areas: 1832 Number of islands: 907 | | | | Map is 3D: No | | Number of dblinks: 1 | | | | Projection: Lambert Conformal Conic | | | | N: 318117.43741634 S: 10875.82723209 | | E: 930172.31282271 W: 123971.19498978 | | | | Digitization threshold: 0 | | Comment: | | | +----------------------------------------------------------------------------+
v.info -h map=geology COMMAND: v.in.ogr input="geol.shp" output="geology" min_area=0.0001 snap=-1 GISDBASE: /bigdata/grassdata05 LOCATION: ncfromfile MAPSET: PERMANENT USER: helena DATE: Mon Nov 6 15:48:53 2006 --------------------------------------------------------------------------------- 1832 input polygons total area: 1.276093e+11 (1832 areas) overlapping area: 0.000000e+00 (0 areas) area without category: 0.000000e+00 (0 areas) ---------------------------------------------------------------------------------
v.info -c map=geology Displaying column types/names for database connection of layer <1>: INTEGER|cat DOUBLE PRECISION|onemap_pro DOUBLE PRECISION|PERIMETER INTEGER|GEOL250_ INTEGER|GEOL250_ID CHARACTER|GEO_NAME DOUBLE PRECISION|SHAPE_area DOUBLE PRECISION|SHAPE_len
v.info -get map=geology name=geology mapset=PERMANENT project=nc_spm_08 database=/home/martin/grassdata title=North Carolina geology map (polygon map) scale=1:1 format=native creator=helena organization=NC OneMap source_date=Mon Nov 6 15:48:53 2006 level=2 map3d=0 num_dblinks=1 projection=Lambert Conformal Conic digitization_threshold=0.000000 comment= north=318117.43741634 south=10875.82723209 east=930172.31282271 west=123971.19498978 top=0.000000 bottom=0.000000 nodes=4556 points=0 lines=0 boundaries=3649 centroids=1832 areas=1832 islands=907 primitives=5481
v.info -g map=geology north=318117.43741634 south=10875.82723209 east=930172.31282271 west=123971.19498978 top=0.000000 bottom=0.000000
{ "name": "geology", "mapset": "PERMANENT", "project": "nc_spm_08_grass7", "database": "\/grassdata", "title": "North Carolina geology map (polygon map)", "scale": 1, "creator": "helena", "organization": "NC OneMap", "source_date": "Mon Nov 6 15:48:53 2006", "timestamp": null, "format": "native", "level": 2, "num_dblinks": 1, "attribute_layer_number": 1, "attribute_layer_name": "geology", "attribute_database": "\/grassdata\/nc_spm_08_grass7\/PERMANENT\/sqlite\/sqlite.db", "attribute_database_driver": "sqlite", "attribute_table": "geology", "attribute_primary_key": "cat", "projection": "Lambert Conformal Conic", "digitization_threshold": 0, "comment": "", "north": 318117.43741634465, "south": 10875.827232091688, "east": 930172.31282271142, "west": 123971.19498978264, "top": 0, "bottom": 0, "nodes": 2724, "points": 0, "lines": 0, "boundaries": 3649, "centroids": 1832, "areas": 1832, "islands": 907, "primitives": 5481, "map3d": false }
Note: The Python tab in the wxGUI can be used for entering the following code:
import grass.script as gcore gcore.vector_columns('geology') # for `v.info -c` gcore.vector_info_topo('geology') # for `v.info shell=topo`
import grass.script as gs import pandas as pd # Run v.info command busstops = gs.run_command("v.info", map="busstopsall", format="json") # Load data into dataframe df = pd.DataFrame([busstops]) # Display the DataFrame print(df)
Available at: v.info source code (history)
Latest change: Sunday Jun 30 20:21:51 2024 in commit: 837b7967f5d98d5043b469862b6083620ae04070
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