Using QGIS, GRASS and PostGIS to answer some difficult questions
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Transcript of Using QGIS, GRASS and PostGIS to answer some difficult questions
Using QGIS, GRASS and PostGIS to answer some difficult questions
How Open Source GIS can help make your life easier
and help you find beer on a Sunday
A simple spatial query
Vector data types available through OGR
Where's the beer?
Geocode Query
QGIS and the GRASS Plugin
GRASS’ Vector to Raster Tool
r.grow Output
SELECT Round(Sum(c.pop10*(ST_Area(ST_Intersection(c.geom, z.the_geom))) / c.totarea))
FROM(SELECT ST_Union(ST_Buffer(b.geom,8046.72)) as the_geom
FROM breweries.brewery b) as z, indiana.block_pop c
WHERE ST_Intersects(z.the_geom, c.geom);
Counting all Hoosiers Who Live Within Five Miles of a Microbrewery
Multipolygon Buffer
QGIS Generated Contours
Cartography / Layout Editing
Versioned Editing Mr Sid support
File Geodatabase support
Current OSGeo Limitations
Where to go for helpPostGIS: Refractions Research
http://refractions.net
QGIS: QGIS Foundationhttp://qgis.org
PostGIS In ActionBy Leo Hsu & Regina Obe
http://postgis.us
GIS StackExchangehttp://gis.stackexchange.com
Philip BernardMapping & Spatial [email protected]