wiki:Grass7/VectorLib

Context Navigation

Version 44 (modified by martinl, 15 years ago) ( diff )
v.parallel

Vector library in GRASS 7

See:

source:grass/trunk/doc/vector/TODO

File-based spatial index

Done in r38385 and r39148

OGR interface

Direct OGR read access

Capability to read OGR layers directly without linking them via v.external. Example:

v.info map=~/shapefiles/@OGR layer=busstopsall
v.extract input=PG:dbname=nc_spm_08@OGR layer=busstopsall where="STREET_1 = 'William Moore Dr.'" output=b1

List of modules which supports direct OGR read access ((*) indicates work in progress):

v.info - r39161
v.db.connect - r39538
v.extract - r39621
v.db.select - r39556
v.buffer - r39809
v.category - r39812
v.class - r39813
v.clean - r39814
v.delaunay - r39821
v.dissolve - r39822
v.distance - r39823
v.drape - r39826
v.extrude - r39827
v.generalize - r39828
v.hull - r39829
v.kcv - r39832
v.neighbors - r39834
v.normal - r39839
v.out.ascii - r39881
v.out.dxf - r39882
v.out.ogr - r39883
v.out.pov - r39884
v.out.svg - r39885
v.overlay - r39895
v.parallel - r39896

Direct OGR write access

Capability to write OGR layers directly without need to store data in the native vector format and then exporting data using v.out.ogr. E.g.

# input: GRASS data
# output: PostGIS database
v.extract map=obce where="NAZEV = Solany" output=PG:dbname=gisdb@OGR olayer=obce

# input: PostGIS layer, ESRI Shapefile
# output: PostGIS database
v.select ainput=PG:dbname=gisdb@OGR alayer=zeleznice \
 binput=shps@OGR blayer=obce operator=intersects \
 output=PG:dbname=gisdb@OGR olayer=obce_zelez

Redesign support structures

Reduce memory requirements particularly for points and lines. See ticket:542.

TODO

3D vector data support