Re: [gdal-dev] Warping an already georeferenced image with control points

2009-01-29 Thread Frank Warmerdam
Jan Hartmann wrote: Hi, I am trying to georeference old maps in two steps: first georeferencing them from the old projection to a modern one, and then ameliorating the georeferenced image by rubber-sheeting it on the base of control points, mostly triangulation points for which the coordinate

Re: [gdal-dev] Is it possible to change block size of a VRT file ?

2009-01-29 Thread Even Rouault
Hi Guillaume, This is a good point and I've also experienced suboptimal performance because of this. The answer is : no, you can't change the block size of a VRTSourcedRasterBand in a VRTDataset. But this can be currently done for a VRTWarpedDataset. Clearly for a scanline oriented underlying

Re: [gdal-dev] Can I create a GDAL data set from bytes in memory?

2009-01-29 Thread Joel Odom
Frank, it's working great. Thanks for pointing these functions out. On Wed, Jan 28, 2009 at 11:36 AM, Frank Warmerdam wrote: > Joel Odom wrote: > >> I've got a situation where I'm trying to use GDAL to read image files >> contained within a KMZ archive. (My project uses both GDAL and libkml.)

[gdal-dev] Is it possible to change block size of a VRT file ?

2009-01-29 Thread guillaume huby
Hi everyone, I'm using GDAL 1.6.0. I observed that by default, VRT Block size is 128x128, whatever the inputs datas block size is. Is it possible to change block size of a VRT file ? And how ? For exemple, if my VRT file is made of 2 tif files that have a block size of 1000x1. The VRT file have a

[gdal-dev] Re: [postgis-devel] WKTRaster: RFC1: serialized form

2009-01-29 Thread strk
On Wed, Jan 28, 2009 at 11:51:38PM +0100, strk wrote: > On Wed, Jan 28, 2009 at 12:39:53PM +0100, strk wrote: > > > http://svn.refractions.net/postgis/spike/wktraster/doc/RFC1-SerializedFormat > > RFC updated to take into account off-db storage and bigger precision > on insertion points. I fluf