# \#gdal

**URL:** https://discourse.julialang.org/tag/gdal/857.md

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

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## [Leveraging the GDAL VSI for “raw” access to NetCDF/HDF5 files inside a Zip archive?](https://discourse.julialang.org/t/leveraging-the-gdal-vsi-for-raw-access-to-netcdf-hdf5-files-inside-a-zip-archive/128129)

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**Author:** [@Oblomov](https://discourse.julialang.org/u/Oblomov)\
**Replies:** 9\
**Last updated:** [April 17, 2025, 6:27am UTC](https://discourse.julialang.org/t/leveraging-the-gdal-vsi-for-raw-access-to-netcdf-hdf5-files-inside-a-zip-archive/128129 "2025-04-17T06:27:47Z")

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Hello all, I have an interesting conundrum. My situation is the following: I have some data which is distributed as a zip archive of .nc files. The files are rather large, so I would prefer to not unzip the archive to r…

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## [How to transform CRS of entire shapefile (not a single point)?](https://discourse.julialang.org/t/how-to-transform-crs-of-entire-shapefile-not-a-single-point/84489)

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**Author:** [@floswald](https://discourse.julialang.org/u/floswald)\
**Replies:** 6\
**Last updated:** [June 18, 2024, 6:45pm UTC](https://discourse.julialang.org/t/how-to-transform-crs-of-entire-shapefile-not-a-single-point/84489 "2024-06-18T18:45:04Z")

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I could not find a way to transform an entire shapefile into another crs. There are too many options for a first time user. ArchGDAL.jl? Proj4? To me it seems reasonable that the Shapefile package should have a transform …

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## [TrueColor raster satellite image](https://discourse.julialang.org/t/truecolor-raster-satellite-image/111401)

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**Author:** [@haffner](https://discourse.julialang.org/u/haffner)\
**Replies:** 19\
**Last updated:** [March 11, 2024, 10:56am UTC](https://discourse.julialang.org/t/truecolor-raster-satellite-image/111401 "2024-03-11T10:56:34Z")

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I’m trying to compose a TrueColor image from three raster channels a VIIRS granule stored in a netCDF4 file. I’d like to do this in pure Julia but haven’t figured it out yet. I can read the data using NCDatasets.jl, bu…

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## [How to resample (downscale) a one-hot encoded (boolean) raster?](https://discourse.julialang.org/t/how-to-resample-downscale-a-one-hot-encoded-boolean-raster/101828)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 6\
**Last updated:** [July 20, 2023, 1:51pm UTC](https://discourse.julialang.org/t/how-to-resample-downscale-a-one-hot-encoded-boolean-raster/101828 "2023-07-20T13:51:10Z")

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Hello, I have “one-hot” encoded a 1x1km soil category raster, so I have a raster representing a specific soil class, 0 when is not in the class, and 1 otherwise. I would now downscale it to match my actual other data a…

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## [ArchGDAL.read error: GDALError (CE\_Failure, code 4):not recognized as a supported file format](https://discourse.julialang.org/t/archgdal-read-error-gdalerror-ce-failure-code-4-not-recognized-as-a-supported-file-format/95959)

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**Author:** [@sunayana](https://discourse.julialang.org/u/sunayana)\
**Replies:** 4\
**Last updated:** [March 12, 2023, 10:08am UTC](https://discourse.julialang.org/t/archgdal-read-error-gdalerror-ce-failure-code-4-not-recognized-as-a-supported-file-format/95959 "2023-03-12T10:08:44Z")

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Hi, I am currently stuck with a strange issue in GDAL and do not understand how to solve it. I have a method inside an IO module: read\_image\_file(filename::AbstractPath) = AG.read(string(filename)) This method is bein…

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## [GDAL/ogr2ogr File Conversion](https://discourse.julialang.org/t/gdal-ogr2ogr-file-conversion/82835)

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**Author:** [@hexjulia](https://discourse.julialang.org/u/hexjulia)\
**Replies:** 4\
**Last updated:** [June 15, 2022, 10:29pm UTC](https://discourse.julialang.org/t/gdal-ogr2ogr-file-conversion/82835 "2022-06-15T22:29:10Z")

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Hi all, I’m trying to complete what I thought would be a relatively simple task (although I am new to Julia and coding in general) with GDAL, specifically converting a .shp to a GeoPackage using ogr2ogr. I’ve followed …

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## [ArchGDAL Convexhull not return a polygon](https://discourse.julialang.org/t/archgdal-convexhull-not-return-a-polygon/75609)

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**Author:** [@ZWJZ9](https://discourse.julialang.org/u/ZWJZ9)\
**Replies:** 1\
**Last updated:** [February 2, 2022, 12:35am UTC](https://discourse.julialang.org/t/archgdal-convexhull-not-return-a-polygon/75609 "2022-02-02T00:35:52Z")

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Hello Everyone, I am new to julia and currently using ArchGDAL. Currently, I want to compute a convex hull for a lot of points. When I using AG.convexhull, and save the result to a shapefile using GeoDataFrames. When I …

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## [Inefficient compression of very large GeoTIFFs with ArchGDAL compared to gdal\_\* binaries](https://discourse.julialang.org/t/inefficient-compression-of-very-large-geotiffs-with-archgdal-compared-to-gdal-binaries/70687)

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**Author:** [@NiclasMattsson](https://discourse.julialang.org/u/NiclasMattsson)\
**Replies:** 3\
**Last updated:** [November 1, 2021, 7:29pm UTC](https://discourse.julialang.org/t/inefficient-compression-of-very-large-geotiffs-with-archgdal-compared-to-gdal-binaries/70687 "2021-11-01T19:29:49Z")

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I’m using ArchGDAL to save climate data as large 3D GeoTIFFs, but I’ve noticed that files created in ArchGDAL are roughly 3x larger than those created with gdal\_\* binaries. As a diagnostic I eliminated all my calculation…