# \#archgdal

**URL:** https://discourse.julialang.org/tag/archgdal/1103.md

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## [Loading MODIS HDF4 files with ArchGDAL](https://discourse.julialang.org/t/loading-modis-hdf4-files-with-archgdal/126977)

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**Author:** [@Oblomov](https://discourse.julialang.org/u/Oblomov)\
**Replies:** 13\
**Last updated:** [April 9, 2025, 8:31am UTC](https://discourse.julialang.org/t/loading-modis-hdf4-files-with-archgdal/126977 "2025-04-09T08:31:52Z")

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I would like to port to Julia some code that we have that works on MODIS satellite imagery. The source files are in HDF4 format, and are correctly recognized as MODIS datasets by the system gdalinfo. However, if I try lo…

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## [Grouping geommetries by colums](https://discourse.julialang.org/t/grouping-geommetries-by-colums/122241)

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**Author:** [@Daves\_Cordova](https://discourse.julialang.org/u/Daves_Cordova)\
**Replies:** 2\
**Last updated:** [November 5, 2024, 2:33pm UTC](https://discourse.julialang.org/t/grouping-geommetries-by-colums/122241 "2024-11-05T14:33:28Z")

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I need to combine geometries for a shapefile. Initially, there is shapefile\_path\_cities that will form the layer behind, after theres is shapefile\_path\_highways: using GeoDataFrames using DataFrames using XLSX using Plo…

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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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## [Converting UTM to EPSG:5389](https://discourse.julialang.org/t/converting-utm-to-epsg-5389/87280)

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**Author:** [@ameresv](https://discourse.julialang.org/u/ameresv)\
**Replies:** 5\
**Last updated:** [September 14, 2022, 10:20pm UTC](https://discourse.julialang.org/t/converting-utm-to-epsg-5389/87280 "2022-09-14T22:20:54Z")

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It could sound like a silly question, but I am having trouble converting points from UTM to long - lat (researching a bit, I found that I need is EPSG:5389 because is on the Southern side of Peru). So, the data looks li…

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## [Error while reading and writing raster dataset using ArchGDAL](https://discourse.julialang.org/t/error-while-reading-and-writing-raster-dataset-using-archgdal/85268)

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**Author:** [@anu21](https://discourse.julialang.org/u/anu21)\
**Replies:** 2\
**Last updated:** [August 5, 2022, 6:20pm UTC](https://discourse.julialang.org/t/error-while-reading-and-writing-raster-dataset-using-archgdal/85268 "2022-08-05T18:20:36Z")

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I am new to the Julia. I am using ArchGDAL to open and write raster data, but I keep getting this error. GDALError (CE\_Failure, code 1): GDALOpen() called on “/path/to/file” recursively Is anyone familiar with this err…

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## [Computing Concave hull/alpha shape for a point cloud](https://discourse.julialang.org/t/computing-concave-hull-alpha-shape-for-a-point-cloud/82746)

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**Author:** [@arsh](https://discourse.julialang.org/u/arsh)\
**Replies:** 14\
**Last updated:** [June 16, 2022, 2:56pm UTC](https://discourse.julialang.org/t/computing-concave-hull-alpha-shape-for-a-point-cloud/82746 "2022-06-16T14:56:14Z")

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I have a point cloud and I want to find it’s outline(also includes holes). Eg: A delaunay triangulation of such point cloud might look like I have tried to use existing tools in the ecosystem but most of them don’t s…

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## [Find if point is within geojson polygons](https://discourse.julialang.org/t/find-if-point-is-within-geojson-polygons/70416)

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**Author:** [@alex-s-gardner](https://discourse.julialang.org/u/alex-s-gardner)\
**Replies:** 3\
**Last updated:** [October 26, 2021, 10:47pm UTC](https://discourse.julialang.org/t/find-if-point-is-within-geojson-polygons/70416 "2021-10-26T22:47:36Z")

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I am slowly dipping my toe into the Julia waters and I’m hoping someone could point me in the right direction as to how I can determine if a point falls within any of the polygons defined by a geojson file. I’ve found Ge…