GRASS GIS 6.4.svn Reference Manual

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.

This reference manual details the use of modules distributed with Geographic Resources Analysis Support System (GRASS), an open source (GNU GPL'ed), image processing and geographic information system (GIS).

Quick Introduction

• GRASS startup manual page
• How to start with GRASS
• Introductions
  • 2D raster map processing
  • 3D raster map (voxel) processing
  • Image processing
  • Database management
  • Vector map processing and network analysis
  • Projections and spatial transformations
  • SQL support
  • Display drivers
  • GRASS variables and environment variables
• The GRASS Extensions Manager (GEM)

database commands:

db.columns	List all columns for a given table.
db.connect	Prints/sets general DB connection for current mapset and exits.
db.copy	Copy a table. Either 'from_table' (optionaly with 'where') can be used or 'select' option, but not 'from_table' and 'select' at the same time.
db.describe	Describes a table in detail.
db.drivers	List all database drivers.
db.dropcol	Drops a column from selected attribute table
db.droptable	Drops an attribute table
db.execute	Executes any SQL statement.
db.in.ogr	Imports attribute tables in various formats.
db.login	Sets user/password for driver/database.
db.out.ogr	Exports attribute tables into various formats.
db.select	Selects data from table.
db.tables	Lists all tables for a given database.
db.test	Test database driver, database must exist and set by db.connect.

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