Hi,
I have a GeoTIFF file of 2GB size. Now, this question is about
gdaladdo and how to optimize loading time of such a large raster file.
According to my observations QGIS has fastest loading times when it's
a single GeoTIFF file with overview images.
Q.1: Does anybody have tipps for even faster
On Sunday 12 October 2014 14:34:20 Stefan Keller wrote:
> Hi,
>
> I have a GeoTIFF file of 2GB size. Now, this question is about
> gdaladdo and how to optimize loading time of such a large raster file.
>
> According to my observations QGIS has fastest loading times when it's
> a single GeoTIFF fi
Hi,
I am trying to clip a road network by a polygon in a script using the
algorithm 'qgis:clip'. The result seems to be quite ok but it takes an
incredible long time to produce, about 14 hours (!). The road network
shapefile consists of about 5000 features (not very many, I believe) and
the clippin
Hi QGISer's
I've some old (early 1960's) that was acquired with what appears to be a
clarke ellipsoid. This predates AGD66. It's from Australia, with a central
meridian of 141. I've got a scanned image but it's from the middle of a
desert and there are no landmarks to georeference. I've also got a
Matt,
Try the GDA Technical Manual [1] p7 for starters.
This contains a reference and some parameters for Clark 1858 ellipsoid and the
Australian National Grid that was often used in conjunction.
This will give you an authoritative starting point.
Bruce
[1] http://www.icsm.gov.au/gda/gdav2.3.
Il 12/10/2014 23:31, Jonas Sjögren ha scritto:
> I am trying to clip a road network by a polygon in a script using the
> algorithm
> 'qgis:clip'. The result seems to be quite ok but it takes an incredible long
> time to
> produce, about 14 hours (!).
Have you tried one of the several Processing
