# colmap/glomap

[DEPRECATED] GLOMAP - Global Structured-from-Motion Revisited

Repository: https://github.com/colmap/glomap
Canonical: https://ross.abutalabs.com/products/glomap
Language: C++
License: BSD-3-Clause
License Family: permissive
Archived: true
Last push: 2026-01-30T12:16:05+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 65, release rhythm 30, longevity 59
- inputs: {"age_days": 826, "days_push": 215, "days_rel": 306, "gap_med": 171, "n_releases_24m": 2}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2351, forks 182 (observed 2026-08-28T04:06:40.375405+00:00)

## What it is
GLOMAP is a global structure-from-motion pipeline for image-based 3D reconstruction that takes a COLMAP database as input and outputs a COLMAP sparse reconstruction. It is significantly faster than COLMAP's incremental mapper (typically 1-2 orders of magnitude) with on-par or superior quality, but is now deprecated and merged into COLMAP as its 'global' mapper.

## Use cases
- reconstruct 3D scenes from image collections
- run global structure-from-motion on a COLMAP database
- speed up sparse 3D reconstruction compared to COLMAP incremental mapping
- average rotations and estimate camera positions globally
- produce COLMAP-compatible sparse reconstructions
- reconstruct large-scale photo datasets efficiently

## When to choose
- you need fast, scalable sparse 3D reconstruction from images
- you already have a COLMAP database with features and matches
- you want COLMAP-compatible output with better runtime

## When to avoid
- starting new projects - use COLMAP's built-in global mapper instead
- you need maintained software with active support
- you need dense reconstruction rather than sparse

## Facets
- artifact type: cli-tool
- maturity: abandoned
- function: computer-vision, image-processing, graphics
- domain: computer-vision, photography
- platform: windows, cpp, cli
- tags: structure-from-motion, 3d-reconstruction, colmap, global-sfm, deprecated, eccv-2024, algorithms, linux, macos

## Member repositories
- colmap/glomap (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:40.375405+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:36:53.903948+00:00, confidence not recorded.
  - readme: https://github.com/colmap/glomap (fetched 2026-08-28T04:06:40.375405+00:00, sha a97c16b44880)
- Data as of 2026-08-30T08:39:29.467469+00:00.