# Source Registry

## Source #1
- **Title**: LiteSAM GitHub Repository
- **Link**: https://github.com/boyagesmile/LiteSAM
- **Tier**: L1
- **Publication Date**: 2025-10-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: 4 commits total, no releases, no license
- **Target Audience**: Computer vision researchers, satellite-aerial matching
- **Research Boundary Match**: ✅ Full match
- **Summary**: Official LiteSAM code repo. 5 stars, 0 forks, no issues. Weights hosted on Google Drive (mloftr.ckpt). Built on EfficientLoFTR. Very low community adoption.
- **Related Sub-question**: SQ-2, SQ-3

## Source #2
- **Title**: LiteSAM Paper (Remote Sensing, MDPI)
- **Link**: https://www.mdpi.com/2072-4292/17/19/3349
- **Tier**: L1
- **Publication Date**: 2025-10-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: Remote Sensing Vol 17, Issue 19
- **Target Audience**: Remote sensing, UAV localization researchers
- **Research Boundary Match**: ✅ Full match
- **Summary**: 6.31M params. 77.3% Hard hit rate is on SELF-MADE dataset (Harbin/Qiqihar), NOT UAV-VisLoc. UAV-VisLoc Hard: 61.65%, RMSE@30=17.86m. Benchmarked on RTX 3090.
- **Related Sub-question**: SQ-2, SQ-3

## Source #3
- **Title**: XFeat (CVPR 2024)
- **Link**: https://github.com/verlab/accelerated_features
- **Tier**: L1
- **Publication Date**: 2024-06-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: CVPR 2024, actively maintained
- **Target Audience**: Feature extraction/matching community
- **Research Boundary Match**: ✅ Full match
- **Summary**: 5x faster than SuperPoint. AUC@10° 65.4 vs SuperPoint 50.1 on Megadepth. Built-in semi-dense matcher. ~15ms GPU, ~37ms CPU.
- **Related Sub-question**: SQ-1

## Source #4
- **Title**: SatLoc-Fusion (MDPI 2025)
- **Link**: https://www.mdpi.com/2072-4292/17/17/3048
- **Tier**: L1
- **Publication Date**: 2025-08-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: Remote Sensing, 2025
- **Target Audience**: UAV navigation researchers
- **Research Boundary Match**: ✅ Full match
- **Summary**: Uses XFeat for VO + DINOv2 for satellite matching. <15m error, >90% trajectory coverage, >2Hz on 6 TFLOPS edge hardware. Validates XFeat for UAV VO.
- **Related Sub-question**: SQ-1

## Source #5
- **Title**: CVE-2025-32434 (PyTorch)
- **Link**: https://nvd.nist.gov/vuln/detail/CVE-2025-32434
- **Tier**: L1
- **Publication Date**: 2025-04-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: PyTorch ≤2.5.1
- **Target Audience**: All PyTorch users
- **Research Boundary Match**: ✅ Full match
- **Summary**: RCE even with weights_only=True in torch.load(). Fixed in PyTorch 2.6+.
- **Related Sub-question**: SQ-8

## Source #6
- **Title**: CVE-2026-24747 (PyTorch)
- **Link**: CVE database
- **Tier**: L1
- **Publication Date**: 2026-01-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: Fixed in PyTorch 2.10.0+
- **Target Audience**: All PyTorch users
- **Research Boundary Match**: ✅ Full match
- **Summary**: Memory corruption in weights_only unpickler. Requires PyTorch ≥2.10.0.
- **Related Sub-question**: SQ-8

## Source #7
- **Title**: Nature Scientific Reports - DINOv2 ViT comparison
- **Link**: https://www.nature.com/articles/s41598-024-83358-8
- **Tier**: L2
- **Publication Date**: 2024-12-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: 2024
- **Target Audience**: Computer vision researchers
- **Research Boundary Match**: ⚠️ Partial overlap (classification, not retrieval)
- **Summary**: ViT-S vs ViT-B: recall +2.54pp, precision +5.36pp. ViT-B uses ~900-1100MB VRAM vs ViT-S ~300MB. Not UAV-specific but indicative.
- **Related Sub-question**: SQ-7

## Source #8
- **Title**: Google Maps Ukraine Imagery Policy
- **Link**: https://en.ain.ua/2024/05/10/google-maps-shows-mariupol-irpin-and-other-cities-destroyed-by-russia/
- **Tier**: L2
- **Publication Date**: 2024-05-10
- **Timeliness Status**: ✅ Currently valid
- **Target Audience**: General public, geospatial users
- **Research Boundary Match**: ✅ Full match
- **Summary**: Google intentionally does not publish recent imagery of conflict areas. Imagery is 1-3 years old for eastern Ukraine.
- **Related Sub-question**: SQ-10

## Source #9
- **Title**: GTSAM IndeterminantLinearSystemException
- **Link**: https://github.com/borglab/gtsam/issues/561
- **Tier**: L4
- **Publication Date**: 2021+
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: GTSAM 4.x
- **Target Audience**: GTSAM users
- **Research Boundary Match**: ✅ Full match
- **Summary**: iSAM2.update() can throw IndeterminantLinearSystemException with certain factor patterns. Need error handling.
- **Related Sub-question**: SQ-9

## Source #10
- **Title**: EfficientLoFTR (CVPR 2024)
- **Link**: https://github.com/zju3dv/EfficientLoFTR
- **Tier**: L1
- **Publication Date**: 2024-06-01
- **Timeliness Status**: ✅ Currently valid
- **Version Info**: 964 stars, CVPR 2024, HuggingFace integration
- **Target Audience**: Feature matching community
- **Research Boundary Match**: ✅ Full match
- **Summary**: LiteSAM's base architecture. 15.05M params. Much more mature than LiteSAM. Has HuggingFace integration. Well-proven codebase.
- **Related Sub-question**: SQ-3

## Source #11
- **Title**: Tracasa SENX4 Ukraine Imagery
- **Link**: https://tracasa.es/tracasa-offers-free-of-charge-500000-km2-of-super-resolved-sentinel-2-satellites-images-of-the-ukraine/
- **Tier**: L2
- **Publication Date**: 2022+
- **Timeliness Status**: ⚠️ Needs verification
- **Version Info**: Super-resolved Sentinel-2 to 2.5m
- **Target Audience**: Ukraine geospatial users
- **Research Boundary Match**: ✅ Full match
- **Summary**: Free 500,000 km² of Ukraine at 2.5m resolution (deep learning super-resolution from 10m Sentinel-2). Could serve as fallback.
- **Related Sub-question**: SQ-10

## Source #12
- **Title**: Maxar Ukraine Imagery Status
- **Link**: https://en.defence-ua.com/news/maxar_satellite_imagery_is_still_available_in_ukraine_but_its_paid_only_now-13758.html
- **Tier**: L3
- **Publication Date**: 2025-03-01
- **Timeliness Status**: ✅ Currently valid
- **Summary**: Maxar restored Ukraine access March 2025 (was suspended). Paid-only. 31-50cm resolution.
- **Related Sub-question**: SQ-10