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Comparison · Analytics
CMAQ vs rosm
A side-by-side editorial comparison of CMAQ and rosm — release velocity, themes, recent moves, and the top alternatives to consider.
CMAQ vs rosm: at a glance
What is CMAQ?
CMAQ went global in v5.5, and has been patching that surface ever since.
CMAQ is the EPA's Community Multiscale Air Quality modeling system, used for regulatory and research air quality simulation. Its release rhythm is strictly two-tier: numbered major versions carry new science and fresh benchmark datasets, while the x.y.z.n updates carry bug fixes against documentation and benchmarks that stay pinned to the parent version. The current line is v5.5, which introduced CRACMM2 chemistry and coupling to MPAS-A meteorology, followed by three patch rollups.
What is rosm?
rosm 0.3.0 silently deprecates its entire API and rebuilds on wk and curl
rosm downloads and stitches raster map tiles from OpenStreetMap and similar sources for use in R. After six years without a release, 0.3.0 deprecated the whole previous API, dropped the rgdal dependency, and introduced a replacement built on wk geometry and curl's multi-download interface. The follow-up 0.3.1 is documentation and CI work, plus test skips for Bing and Stamen URLs that no longer resolve.
CMAQ vs rosm: editorial side-by-side
CMAQ
0.0ANALYTICS
CMAQ went global in v5.5, and has been patching that surface ever since.
◆ Current state
CMAQ is the EPA's Community Multiscale Air Quality modeling system, used for regulatory and research air quality simulation. Its release rhythm is strictly two-tier: numbered major versions carry new science and fresh benchmark datasets, while the x.y.z.n updates carry bug fixes against documentation and benchmarks that stay pinned to the parent version. The current line is v5.5, which introduced CRACMM2 chemistry and coupling to MPAS-A meteorology, followed by three patch rollups.
◆ Where it's heading
The v5.5 patches cluster around the newest and most sensitive components. ISAM source apportionment and DDM-3D sensitivity analysis account for corrections in every one of the three updates, and CRACMM2 needed fixes within months of release. That is the expected shape after a major version lands: the science is stable, the instrumentation built on top of it is not. Parallel I/O work in the latest patch suggests the global configurations are now being run at scales that expose throughput limits.
◆ Prediction
The next major version will fold these fixes in with new science, documentation and benchmark data — the release notes state this explicitly each time. Until then, expect further ISAM and DDM-3D corrections, which have appeared in every patch so far.
rosm
0.0ANALYTICS
rosm 0.3.0 silently deprecates its entire API and rebuilds on wk and curl
◆ Current state
rosm downloads and stitches raster map tiles from OpenStreetMap and similar sources for use in R. After six years without a release, 0.3.0 deprecated the whole previous API, dropped the rgdal dependency, and introduced a replacement built on wk geometry and curl's multi-download interface. The follow-up 0.3.1 is documentation and CI work, plus test skips for Bing and Stamen URLs that no longer resolve.
◆ Where it's heading
The package is being brought back from dormancy on modern foundations rather than extended. rgdal's retirement forced the issue, and the maintainer used it to replace the download path with concurrent curl requests and to hand geometry handling to wk. What follows is consolidation: dead built-in tile sources are being tested around rather than replaced, which leaves the source registry as the obvious unfinished edge.
◆ Prediction
The dead Bing and Stamen endpoints are currently skipped rather than fixed, so the next release most likely prunes or re-points the built-in tile source list and continues retiring the silently deprecated functions.
Alternatives to CMAQ and rosm
Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either CMAQ or rosm.
geodist
geodist stays dependency-free and fast, and warns you when 'cheap' distances stop being honest.
errors
errors keeps making uncertainty print the way each scientific field expects.
enpls
enpls has not changed its statistics since 2016 — only its website, twice.
grex
grex is a lookup table with a version number — it ships when the annotation moves.
protr
protr's feature set is finished; the work now is surviving Bioconductor's churn.
Recent activity from CMAQ and rosm
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 6mo agorosmDocumentation syntax and CI cleanup after the rewrite
- 6mo agorosmEntire previous API deprecated; new wk and curl backend ⚡
- 1y agoCMAQCMAQ 5.5.0.3 enables parallel I/O, fixes DDM-3D control files
- 1y agoCMAQCMAQ 5.5.0.2 corrects ISAM aerosol and cloud processing
- 1y agoCMAQCMAQ 5.5.0.1 fixes SAPRC mechanism runs and NLCD mapping
- 1y agoCMAQCMAQ 5.5 adds global simulation coupled to MPAS-A ⚡
- 1y agoCMAQCMAQ 5.4.0.5: minor ELMO output fixes
- 2y agoCMAQCMAQ 5.4.0.4 fixes RBSTATS under ROS3, corrects a molecular weight
- 7y agorosmFix cancellation during tile stitching
- 9y agorosmDownloads move to curl; foreach dependency removed
- 10y agorosmFaster tile merging and overlay helpers
- 10y agorosmosm.raster() exports tiles as RasterStack objects
Frequently asked questions
What is the difference between CMAQ and rosm?
They serve adjacent needs but don't currently overlap on shipped themes. CMAQ and rosm are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is CMAQ better than rosm?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. CMAQ and rosm are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to CMAQ?
Top CMAQ alternatives in Analytics are ranked by recent ship velocity. Browse the "CMAQ alternatives" section above for the current picks, or visit /alternatives/cmaq for the full list with editorial commentary on each.
What are the best alternatives to rosm?
Top rosm alternatives in Analytics are ranked by recent ship velocity. Browse the "rosm alternatives" section above for the current picks, or visit /alternatives/rosm for the full list with editorial commentary on each.