Re: [gdal-dev] Fwd: gdal_translate histogram conversion

2022-06-01 Thread Andrew C Aitchison
On Wed, 1 Jun 2022, Pierre Chaponniere wrote: Hello gdal community ! I'd like to submit your group a question in regards to the use of gdal_translate function. I am converting tif images (64bits, 6 bands multispectral) to jpg images uint8 uint8 can only have 256 distinct values, but from the

[gdal-dev] Fwd: gdal_translate histogram conversion

2022-06-01 Thread Pierre Chaponniere
Hello gdal community ! I'd like to submit your group a question in regards to the use of gdal_translate function. I am converting tif images (64bits, 6 bands multispectral) to jpg images uint8 via the Qgis interface to operate in lot but I face issues with the conversion of the histogram values. I

[gdal-dev] Call for discussion on RFC 86: Column-oriented read API for vector layers

2022-06-01 Thread Even Rouault
Hi, I've posted in https://github.com/OSGeo/gdal/pull/5830 a new RFC to add a column-oriented read API for vector layers. This RFC describes the addition of new methods to the OGRLayer class to retrieve batches of features with a column-oriented memory layout, that suits formats that have tha