vector(1grass)
💖 vector(1grass) 💖 — GRASS User's Manual
✨ GRASS 8.5.0 Reference Manual ✨
okay bestie, so Geographic Resources Analysis Support System, commonly referred to as GRASS, is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies. no cap, it's iconic. 💅
This reference manual details the use of modules distributed with Geographic Resources Analysis Support System (GRASS), an open source (GNU GPLed), image processing and geographic information system (GIS). 🫶
Go to Vector introduction | topics 🌸
Go back to help overview 🫶
🌈 Vector commands: 🌈
okay so here's the entire vector command lineup, bestie — every single one, no skips: 💅
v.buffer— creates a buffer around vector features of given type 💖v.build.all— rebuilds topology on all vector maps in the current mapset ✨v.build— creates topology for vector map 🧚v.build.polylines— builds polylines from lines or boundaries 🌸v.category— attaches, deletes or reports vector categories to/from/of map geometry 💅v.centroids— adds missing centroids to closed boundaries 🎀v.class— classifies attribute data, e.g. for thematic mapping 📊v.clean— a whole toolset for cleaning topology of vector map 🧼v.clip— extracts features of input map which overlay features of clip map ✂️v.cluster— performs cluster identification 🔍v.colors— creates/modifies the color table associated with a vector map 🎨v.colors.out— exports the color table associated with a vector map 📤v.db.addcolumn— adds one or more columns to the attribute table connected to a given vector map ➕v.db.addtable— creates and connects a new attribute table to a given layer of an existing vector map 🔗v.db.connect— prints/sets DB connection for a vector map to attribute table 🗄️v.db.dropcolumn— drops a column from the attribute table connected to a given vector map ✂️v.db.droprow— removes a vector feature from a vector map through attribute selection 🗑️v.db.droptable— removes existing attribute table of a vector map 💥v.db.join— joins a database table to a vector map table 🧩v.db.reconnect.all— reconnects attribute tables for all vector maps from the current mapset to a new database 🔄v.db.renamecolumn— renames a column in the attribute table connected to a given vector map ✏️v.db.select— prints vector map attributes 🖨️v.db.univar— calculates univariate statistics on selected table column for a GRASS vector map 📈v.db.update— updates a column in the attribute table connected to a vector map 🔄v.decimate— decimates a point cloud ☁️v.delaunay— creates a Delaunay triangulation from an input vector map containing points or centroids 🔺v.dissolve— dissolves adjacent or overlapping features sharing a common category number or attribute 🫠v.distance— finds the nearest element in vector map ’to’ for elements in vector map ’from’ 🎯v.drape— converts 2D vector features to 3D by sampling of elevation raster map 🏔️v.edit— edits a vector map, allows adding, deleting and modifying selected vector features ✍️v.external— creates a new pseudo-vector map as a link to an OGR-supported layer or a PostGIS feature table 🔗v.external.out— defines vector output format 📐v.extract— selects vector features from an existing vector map and creates a new vector map containing only the selected features 🎯v.extrude— extrudes flat vector features to 3D vector features with defined height 🏗️v.fill.holes— fill holes in areas by keeping only outer boundaries 🕳️v.generalize— performs vector based generalization 🌀v.hull— produces a 2D/3D convex hull for a given vector map 🔷v.import— imports vector data into a GRASS vector map using OGR library and reprojects on the fly 🛬v.in.ascii— creates a vector map from an ASCII points file or ASCII vector file 📄v.in.db— creates new vector (points) map from database table containing coordinates 🗺️v.in.dxf— converts file in DXF format to GRASS vector map 📐v.in.e00— imports E00 file into a vector map 📦v.in.geonames— imports geonames.org country files into a vector points map 🌍v.in.lines— imports ASCII x,y[,z] coordinates as a series of lines 📈v.in.mapgen— imports Mapgen or Matlab-ASCII vector maps into GRASS 🧪v.in.ogr— imports vector data into a GRASS vector map using OGR library 📥v.in.region— creates a vector polygon from the current region extent 🔲v.in.wfs— imports GetFeature from a WFS server 🌐v.info— outputs basic information about a vector map ℹ️v.kcv— randomly partition points into test/train sets 🎲v.kernel— generates a raster density map from vector points map 🗺️v.label— creates paint labels for a vector map from attached attributes 🏷️v.label.sa— create optimally placed labels for vector map(s) 🎀v.lidar.correction— corrects the v.lidar.growing output. It is the last of the three algorithms for LIDAR filtering 🛠️v.lidar.edgedetection— detects the object’s edges from a LIDAR data set 📡v.lidar.growing— building contour determination and Region Growing algorithm for determining the building inside 🏢v.lrs.create— creates a linear reference system 📏v.lrs.label— creates stationing from input lines, and linear reference system 🚉v.lrs.segment— creates points/segments from input lines, linear reference system and positions read from stdin or a file 📍v.lrs.where— finds line id and real km+offset for given points in vector map using linear reference system 🧭v.mkgrid— creates a vector map of a user-defined grid 🔳v.neighbors— neighborhood analysis tool for vector point maps 🏘️v.net.alloc— allocates subnets for nearest centers 📡v.net.allpairs— computes the shortest path between all pairs of nodes in the network 🛣️v.net.bridge— computes bridges and articulation points in the network 🌉v.net.centrality— computes degree, centrality, betweeness, closeness and eigenvector centrality measures in the network 👑
okay so the SEE ALSO list is literally a whole vibe, here's every single v.* command and what it does, no skips 💅
v.net.components— figures out which nodes are strongly and weakly connected in the network, like mapping out the whole social web 🕸️v.net.connectivity— computes vertex connectivity between two sets of nodes in the network, aka how well those friend groups can talk to each other 💬v.net.distance— computes the shortest distance via the network between given sets of features, like the fastest route to your bestie's house 🏃♀️v.net.flow— computes the maximum flow between two sets of nodes in the network, maximum gossip energy 📣v.net— performs network maintenance, the unglamorous but essential admin work 🛠️v.net.iso— splits subnets for nearest centers by cost isolines, like drawing contour lines of accessibility ✨v.net.path— finds the shortest path on a vector network, basically your GPS for vector data 🗺️v.net.salesman— creates a cycle connecting given nodes (Traveling salesman problem), iconic TSP behavior 🎯v.net.spanningtree— computes minimum spanning tree for the network, the most efficient way to connect everything without extra drama 🌳v.net.steiner— creates Steiner tree for the network and given terminals, like the ultimate group project connection 🫂v.net.timetable— finds shortest path using timetables, for when your route depends on the schedule ⏰v.net.visibility— performs visibility graph construction, so you can see what's visible from where, very line-of-sight 👀v.normal— tests for normality for vector points, statistically speaking, not personality-wise 📊v.out.ascii— exports a vector map to a GRASS ASCII vector representation, old-school but iconic ✨v.out.dxf— exports vector map to DXF file format, for all your CAD besties 📐v.out.ogr— exports a vector map layer to any of the supported OGR vector formats, the ultimate glow-up for sharing 🌟v.out.postgis— exports a vector map layer to PostGIS feature table, database queen 💅v.out.pov— converts GRASS x,y,z points to POV-Ray x,z,y format, because POV-Ray has its own vibe 🎨v.out.svg— exports a vector map to SVG file, for when you want vector graphics that scale, periodt 🎀v.out.vtk— converts a vector map to VTK ASCII output, for all your visualization needs 👑v.outlier— removes outliers from vector point data, no more messy data besties 🧹v.overlay— overlays two vector maps offering clip, intersection, difference, symmetrical difference, union operators, the math of map combos 🧮v.pack— exports a vector map as GRASS specific archive file, like a little time capsule 📦v.parallel— creates parallel line to input vector lines, like a sidekick for your geometry 👯v.patch— creates a new vector map by combining other vector maps, the ultimate collab 🤝v.perturb— random location perturbations of vector points, a little chaos for your data 🎲v.profile— vector map profiling tool, like a deep dive into its stats 🔍v.proj— re-projects a vector map from one project to the current project, travel without the jet lag ✈️v.qcount— indices for quadrat counts of vector point lists, very statistics-core 📈v.random— generates random 2D/3D vector points, for when you need spontaneity 🎲v.rast.stats— calculates univariate statistics from a raster map based on a vector map and uploads statistics to new attribute columns, data enrichment slay 📊v.reclass— changes vector category values for an existing vector map according to results of SQL queries or a value in attribute table column, like a makeover for your categories 💄v.rectify— rectifies a vector by computing a coordinate transformation for each object in the vector based on the control points, geometry glow-up 🪄v.report— reports geometry statistics for vector maps, the tea on your shapes ☕v.sample— samples a raster map at vector point locations, like taking little sips of raster data 🥤v.segment— creates points/segments from input vector lines and positions, slicing and dicing 🔪v.select— selects features from vector map (A) by features from other vector map (B), like matching besties 👯v.split— splits vector lines to shorter segments, chopping them up ✂️v.support— updates vector map metadata, keeping the info fresh 💅v.surf.bspline— performs bicubic or bilinear spline interpolation with Tykhonov regularization, fancy math vibes 🧙v.surf.idw— provides surface interpolation from vector point data by Inverse Distance Squared Weighting, smooth like butter 🧈v.surf.rst— performs surface interpolation from vector points map by splines, the classic RST move ✨v.timestamp— modifies a timestamp for a vector map, time-traveling your metadata ⏳v.to.3d— performs transformation of 2D vector features to 3D, adding a whole new dimension 🧊v.to.db— populates attribute values from vector features, filling in the blanks 📝v.to.lines— converts vector polygons or points to lines, geometry shape-shifting 🦋v.to.points— creates points along input lines in new vector map with 2 layers, dotting the i's and crossing the t's 🔴v.to.rast— converts (rasterize) a vector map into a raster map, the glow-down but make it useful 🖼️v.to.rast3— converts a vector map (only points) into a 3D raster map, 3D raster realness 🧊v.transform— performs an affine transformation (shift, scale and rotate) on vector map, geometry makeover 💃v.type— changes type of vector features, like a gender reveal but for geometry 🎀v.univar— calculates univariate statistics of vector map features, the numbers don't lie 📊v.unpack— imports a GRASS specific vector archive file (packed withv.pack) as a vector map, unboxing time 📦v.vect.stats— count points in areas, calculate statistics from point attributes, very demure, very mindful 🧘v.vol.rst— interpolates point data to a 3D raster map using regularized spline with tension (RST) algorithm, 3D smoothness 🧊v.voronoi— creates a Voronoi diagram constrained to the extents of the current region from an input vector map containing points or centroids, the tessellation queen 👑v.what— queries a vector map at given locations, asking it what's up 💬v.what.rast— uploads raster values at positions of vector points to the table, data transfer slay 📤v.what.rast3— uploads 3D raster values at positions of vector points to the table, 3D data upload 💾v.what.strds— uploads space time raster dataset values at positions of vector points to the table, space-time tea ☕v.what.vect— uploads vector values at positions of vector points to the table, vector inception 🔄
and if you wanna explore even more: Main index | Topics index | Keywords index | Graphical index | Full index ✨
© 2003-2026 GRASS Development Team, GRASS 8.5.0 Reference Manual
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