Good morning Dylan,
i guess you are sleeping now but your reply seems to meet my aims very
well! I will try to reproduce your approach and catch up on GDAL and
starspan. If you have some more good hints for me feel free to write me
again :-) - I will write you if i have more questions or big success.
Toodle-oo Andreas
Dylan Beaudette schrieb:
On Thursday 16 August 2007 04:09, Andreas Laggner wrote:
Moin Stefan ;-)
i want to use the spatial data from the raster together with vector data
in postgis. For example: soils from buk1000 and preception from DWD 1km
raster or altitude/slope from DEM25m raster to analyse potentials of
farmland.
I need the values from the cells in a spatial correct topology.
In the year 2007 the archive did not have any solutions for raster data
import.......
hasta luego Andreas
Stephan Holl schrieb:
Hello Andreas,
Andreas,
there are more suitable means to this end. Store your raster data in some
GDAL-compatible format (compressed, tiled, geotiff works well), and you
vector data in postgis. What you are trying to do is a simple operation for
any program which can read GDAL/OGR datasources. One example is Starspan --
this can compute raster summaries for vector point/line/polygon features.
I commonly use this approach to combine vector data stored in PostGIS and
raster data stored in GRASS.
Cheers,
Dylan
Andreas Laggner <[EMAIL PROTECTED]>, [20070816 - 10:43:36]
Moin PostGis users,
i want to import huge raster datasets from ArcGis Grid or Erdas
Imagine .img to PostGis (for example DEM25 meters germany around 16
million cells). What is the best way to do that? Found nothing in the
documentation that seems to be practical......(perhaps transform the
grid to points and import the points with the information of the
original cell size and the projection - but that seems to be
circuitous??).
What are you going to achieve with that? Perhaps you could have a look
at the archive of this list and search for raster data and so forth.
There can be found an interesting dicussion about rasters and PostGIS.
Best
Stephan
--
Dipl. Geoökologe Andreas Laggner
Institut für Ländliche Räume (LR)
Bundesforschungsanstalt für Landwirtschaft (FAL)
Institute of Rural Studies
Federal Agricultural Research Centre (FAL)
Bundesallee 50
D-38116 Braunschweig
Tel.: (+49) (0)531 596 5515
Fax: (+49) (0)531 596 5599
E-mail: [EMAIL PROTECTED]
Homepage: http://www.lr.fal.de/
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