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Comparison · Analytics
dvir vs spsurvey
A side-by-side editorial comparison of dvir and spsurvey — release velocity, themes, recent moves, and the top alternatives to consider.
dvir vs spsurvey: at a glance
What is dvir?
dvir keeps making disaster victim identification a single call instead of a workflow.
dvir handles disaster victim identification: matching unidentified remains against reference families using pedigree likelihoods. The package has consolidated around dviSolve(), a complete pipeline introduced in 3.2.1 and rewritten in 3.3.0 to use generalised likelihood ratios for families with several missing persons. Recent releases have been about making that pipeline survive large cases, adding dviGridSize() and a maxAssign cutoff to skip joint analysis when the combination count explodes, plus per-step timings.
What is spsurvey?
spsurvey has spent four years consolidating after its 5.0.0 rewrite rather than adding to it
spsurvey implements design and analysis for spatially balanced environmental survey samples, the GRTS methodology used in large-scale monitoring programs. The 5.0.0 rewrite is the defining event in its history, and everything in this window is aftercare. 5.6.0 in September 2025 finally removed the startup message warning users about that upgrade, several years on.
dvir vs spsurvey: editorial side-by-side
dvir
0.0ANALYTICS
dvir keeps making disaster victim identification a single call instead of a workflow.
◆ Current state
dvir handles disaster victim identification: matching unidentified remains against reference families using pedigree likelihoods. The package has consolidated around dviSolve(), a complete pipeline introduced in 3.2.1 and rewritten in 3.3.0 to use generalised likelihood ratios for families with several missing persons. Recent releases have been about making that pipeline survive large cases, adding dviGridSize() and a maxAssign cutoff to skip joint analysis when the combination count explodes, plus per-step timings.
◆ Where it's heading
The arc is from a toolbox of functions toward one supervised pipeline, with the older jointDVI() now emitting a legacy message. The current constraint is combinatorial: joint analysis over many victims and missing persons blows up, so the work has gone to measuring the blowup and bailing out of it. Parallelism is mid-migration, with the parallel and pbapply implementation removed and a mirai replacement stated as planned but not yet shipped, leaving numCores accepted and ignored with a warning.
◆ Prediction
The mirai-based parallelisation is announced as coming, so expect it next, most likely applied to the joint analysis step that maxAssign currently exists to avoid.
spsurvey
0.0ANALYTICS
spsurvey has spent four years consolidating after its 5.0.0 rewrite rather than adding to it
◆ Current state
spsurvey implements design and analysis for spatially balanced environmental survey samples, the GRTS methodology used in large-scale monitoring programs. The 5.0.0 rewrite is the defining event in its history, and everything in this window is aftercare. 5.6.0 in September 2025 finally removed the startup message warning users about that upgrade, several years on.
◆ Where it's heading
The direction is toward standard R idioms and away from bespoke ones. 5.4.0 introduced sp_frame and sp_design classes so plot() and summary() work directly, keeping sp_plot() and sp_summary() only for backwards compatibility; 5.5.0 moved warnings from cat() to message() so they can be suppressed normally, and added adjwgtNR() for non-response weight adjustment. Documentation is being pushed off CRAN onto the package website, with only the Start Here vignette remaining. Release cadence is slow — five releases across roughly four years.
◆ Prediction
With the migration messaging retired and the class system settled, further releases are likely to stay in maintenance and statistical-detail territory. Nothing in the entries suggests another rewrite.
Alternatives to dvir and spsurvey
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 dvir or spsurvey.
StreamCatTools
StreamCatTools is quietly moving off web services and onto cloud-native GeoParquet
reproducible
reproducible added a windowed read path so remote GeoTiffs never fully download
qcTAF
qcTAF is building an automated checklist for reproducible fisheries assessments, one criterion at a time
rpymat
After three dormant years, rpymat returned to fix the OpenMP crash that breaks R and conda together
ieegio
ieegio's first release lands electrode trajectory burning and a WebGL-free surface plot
See all dvir alternatives → · See all spsurvey alternatives →
Recent activity from dvir and spsurvey
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1mo agodvirCombination sizing and a cutoff for joint analysis
- 3mo agodvirJoint tables added to solver output
- 3mo agospsurveyExample and unit test updates
- 3mo agodvirVictim and database accessors, plus solver refinements
- 10mo agospsurvey5.0.0 migration warning retired; vignettes moved to the website
- 1y agodvirSolver rewritten around generalised likelihood ratios
- 2y agospsurveyFixes for revisit_dsgn() panels and empty geometries in grts()/irs()
- 2y agodvirdviSolve() pipeline and manual pairing controls
- 2y agodvirMaintainer handover and small reporting additions
- 3y agospsurveyadjwgtNR() for non-response weighting; messages moved to message()
- 3y agospsurveyCitation updated to Dumelle et al. (2023)
- 3y agospsurveysp_frame and sp_design classes make plot() and summary() work directly
Frequently asked questions
What is the difference between dvir and spsurvey?
They serve adjacent needs but don't currently overlap on shipped themes. dvir and spsurvey 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 dvir better than spsurvey?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. dvir and spsurvey 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 dvir?
Top dvir alternatives in Analytics are ranked by recent ship velocity. Browse the "dvir alternatives" section above for the current picks, or visit /alternatives/dvir for the full list with editorial commentary on each.
What are the best alternatives to spsurvey?
Top spsurvey alternatives in Analytics are ranked by recent ship velocity. Browse the "spsurvey alternatives" section above for the current picks, or visit /alternatives/spsurvey for the full list with editorial commentary on each.