https://spatialthoughts.com/category/gdal/Recent content in GDAL/OGR on Spatial ThoughtsHugoen-usTue, 02 Apr 2024 00:00:00 +0000https://spatialthoughts.com/2024/04/02/aggregate-and-align-rasters-gdal/Tue, 02 Apr 2024 00:00:00 +0000https://spatialthoughts.com/2024/04/02/aggregate-and-align-rasters-gdal/When working with raster datasets of different projections and resolutions, it is often desirable to reproject them to the same projection and align them to the same pixel grid. In this post, we will...https://spatialthoughts.com/2024/02/26/gdal-google-cloud-storage/Mon, 26 Feb 2024 00:00:00 +0000https://spatialthoughts.com/2024/02/26/gdal-google-cloud-storage/GDAL has support for GDAL Virtual File System which allows GDAL library and command-line tools to work with files on network storage. This is critical in the era of Cloud-Native Geospatialwhere it is...https://spatialthoughts.com/2022/01/31/multi-criteria-overlay-gdal/Mon, 31 Jan 2022 00:00:00 +0000https://spatialthoughts.com/2022/01/31/multi-criteria-overlay-gdal/Multi-criteria Overlay Analysis is the process of the allocation of land to suit a specific objective on the basis of a variety of attributes that the selected areas should possess. Although this is...https://spatialthoughts.com/2020/06/17/fix-nodata-values/Wed, 17 Jun 2020 00:00:00 +0000https://spatialthoughts.com/2020/06/17/fix-nodata-values/When working with raster data, you may sometimes need to deal with data gaps. These could be the result of sensor malfunction, processing errors or data corruption. Below is an example of data gap...https://spatialthoughts.com/2019/12/28/gdal-calc/Sat, 28 Dec 2019 00:00:00 +0000https://spatialthoughts.com/2019/12/28/gdal-calc/gdal_calc is one of the lesser used tools among the GDAL utilities. There aren't many examples of using it in the wild and some advanced features are not well documented. I am finding myself using it...https://spatialthoughts.com/2019/10/26/convert-between-orthometric-and-ellipsoidal-elevations-using-gdal/Sat, 26 Oct 2019 00:00:00 +0000https://spatialthoughts.com/2019/10/26/convert-between-orthometric-and-ellipsoidal-elevations-using-gdal/When working with elevation data, sometimes you may discover that 2 datasets from different providers have very different elevation values for the same location. A common reason for this being each...https://spatialthoughts.com/2015/10/25/geopdf-gdal/Sun, 25 Oct 2015 00:00:00 +0000https://spatialthoughts.com/2015/10/25/geopdf-gdal/GeoPDF is a unique data format that brings the portability of PDF to geospatial data. A GeoPDF document can present raster and vector data and preserve the georeference information. This can be a...https://spatialthoughts.com/2015/07/12/ogr-spatial-join/Sun, 12 Jul 2015 00:00:00 +0000https://spatialthoughts.com/2015/07/12/ogr-spatial-join/GDAL and OGR libraries come with handy command-line tools. These tools are quite powerful and can save you a lot of effort if you know how to use them. Here I will show how to use the ogrinfo and...