# GDAL

**URL:** https://openplanetary.discourse.group/c/tools/gdal/32.md

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## [About the GDAL category](https://openplanetary.discourse.group/t/about-the-gdal-category/86)

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**Author:** [@nmanaud](https://openplanetary.discourse.group/u/nmanaud)\
**Replies:** 0

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## [Implementation for ocentric latitudes for planetary formats within GDAL](https://openplanetary.discourse.group/t/implementation-for-ocentric-latitudes-for-planetary-formats-within-gdal/838)

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**Author:** [@Trent\_Hare](https://openplanetary.discourse.group/u/Trent_Hare)\
**Replies:** 0\
**Last updated:** [March 13, 2025, 9:42pm UTC](https://openplanetary.discourse.group/t/implementation-for-ocentric-latitudes-for-planetary-formats-within-gdal/838 "2025-03-13T21:42:13Z")

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From a recent email, I tried to explain our current GDAL/PROJ implementation (and workarounds) for supporting “geocentric” latitude systems in commonly used mapping applications. Why – in general, many applications still…

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## [2024 GDAL Users Survey](https://openplanetary.discourse.group/t/2024-gdal-users-survey/816)

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**Author:** [@cmarmo](https://openplanetary.discourse.group/u/cmarmo)\
**Replies:** 0\
**Last updated:** [October 30, 2024, 1:36pm UTC](https://openplanetary.discourse.group/t/2024-gdal-users-survey/816 "2024-10-30T13:36:32Z")

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Cross posting from the GDAL mailing list: The first ever GDAL Users Survey is now open for feedback at 2024 GDAL User Survey The survey is an attempt to provide structured guidance for the maintenance program to focus…

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## [Preparing smooth maps from sparcely populated Shape files](https://openplanetary.discourse.group/t/preparing-smooth-maps-from-sparcely-populated-shape-files/802)

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**Author:** [@ashishdevaraj](https://openplanetary.discourse.group/u/ashishdevaraj)\
**Replies:** 2\
**Last updated:** [August 8, 2024, 10:58pm UTC](https://openplanetary.discourse.group/t/preparing-smooth-maps-from-sparcely-populated-shape-files/802 "2024-08-08T22:58:38Z")

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I have shape file data, which is sparsely populated with rectangular shapes. I would like to make a smooth map using that shape file. Are there tools in GDAL to do interpolation and make smooth maps? I am very new to ha…

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## [Crop image DN range, gdal\_clip2range.py](https://openplanetary.discourse.group/t/crop-image-dn-range-gdal-clip2range-py/698)

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**Author:** [@thare](https://openplanetary.discourse.group/u/thare)\
**Replies:** 0\
**Last updated:** [August 18, 2023, 3:14am UTC](https://openplanetary.discourse.group/t/crop-image-dn-range-gdal-clip2range-py/698 "2023-08-18T03:14:53Z")

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I just wanted to push this out there in case it might be useful to others. There are so many times when I run into an image with extraneous pixel values outside the normal range of data. This could be from an image with …

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## [Tip: Generate Image Footprints Using GDAL/OGR](https://openplanetary.discourse.group/t/tip-generate-image-footprints-using-gdal-ogr/141)

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**Author:** [@dpmayer](https://openplanetary.discourse.group/u/dpmayer)\
**Replies:** 1\
**Last updated:** [August 15, 2023, 3:30pm UTC](https://openplanetary.discourse.group/t/tip-generate-image-footprints-using-gdal-ogr/141 "2023-08-15T15:30:09Z")

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I often need to generate polygons that trace the outline of the valid data area of an image. I used to use gdal\_trace\_outline from dans-gdal-scripts (https://github.com/gina-alaska/dans-gdal-scripts), but that package is…

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## [GDAL Conversion Tips](https://openplanetary.discourse.group/t/gdal-conversion-tips/646)

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**Author:** [@Trent\_Hare](https://openplanetary.discourse.group/u/Trent_Hare)\
**Replies:** 0\
**Last updated:** [May 18, 2023, 6:10pm UTC](https://openplanetary.discourse.group/t/gdal-conversion-tips/646 "2023-05-18T18:10:16Z")

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Note: this is a post from 2009, transferred to this new board with small updates for 2023. GDAL. This open-source raster library (used in many apps) has some support for map projected PDS3, PDS4, ISIS2, ISIS3, VICAR, FI…