[Fixes #13885] Support for COG Remote Layers

[sijandh35]

Fixes #13885

Checklist

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[gemini-code-assist]

Summary of Changes

Hello @sijandh35, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces comprehensive support for Cloud Optimized GeoTIFF (COG) remote layers within GeoNode. It provides a dedicated handler that can validate COG URLs, extract essential geospatial metadata like CRS and bounding box using GDAL, and correctly register these remote resources. This enhancement significantly expands GeoNode's capabilities for handling and integrating external raster data sources efficiently.

Highlights

• New COG Remote Layer Handler: A new handler, RemoteCOGResourceHandler, has been added to enable the import and management of Cloud Optimized GeoTIFF (COG) remote layers, extending GeoNode's data ingestion capabilities.
• Robust URL Validation: The handler includes advanced URL validation for COG files, specifically checking for HTTP Range request support, which is crucial for efficient streaming and partial access of COG data.
• GDAL-powered Metadata Extraction: It leverages GDAL's vsicurl functionality to directly extract essential geospatial metadata, such as Spatial Reference System (SRS/EPSG) and bounding box (BBox), from remote COG files without full download.
• Support for Rotated Images: The implementation correctly calculates the bounding box for COG files that may contain rotation or skew, ensuring accurate spatial representation.
• Comprehensive Testing and Integration: The new handler is fully integrated into the GeoNode resource handler settings and is accompanied by dedicated unit tests to ensure its reliability and correct functionality.

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[gemini-code-assist]

Code Review

This pull request introduces support for remote Cloud Optimized GeoTIFF (COG) layers by adding a new RemoteCOGResourceHandler. The implementation is well-structured, correctly validating remote COG files by checking for HTTP Range Request support and using GDAL's /vsicurl/ virtual filesystem to extract metadata. The handler also properly calculates the bounding box for rotated rasters. The changes are accompanied by a good set of unit tests. I have identified one critical issue in the new handler that could lead to an unhandled exception.

[codecov]

Codecov Report

❌ Patch coverage is 83.75000% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.22%. Comparing base (5ce993c) to head (58eb93f).
⚠️ Report is 50 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #13887      +/-   ##
==========================================
+ Coverage   74.07%   74.22%   +0.14%     
==========================================
  Files         932      946      +14     
  Lines       55720    56609     +889     
  Branches     7522     7669     +147     
==========================================
+ Hits        41277    42016     +739     
- Misses      12794    12901     +107     
- Partials     1649     1692      +43     

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