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Comparison · Analytics
mapsf vs webchem
A side-by-side editorial comparison of mapsf and webchem — release velocity, themes, recent moves, and the top alternatives to consider.
mapsf vs webchem: at a glance
What is mapsf?
Thematic mapping in base R that finally got a theming system, then spent two years polishing legends.
mapsf produces thematic maps on R's base graphics device — choropleths, proportional symbols, typology maps, rasters, and their combinations, with legends, scale bars, north arrows, and insets as composable elements. Version 1.0.0 was the structural release, introducing a theming system that deprecated eight scattered styling arguments and adding mf_png() and mf_svg() export helpers plus alpha transparency across map types. The 1.1.x and 1.2.x line since then has been steady refinement: background and extent control on the drawing functions, decimal and thousands-separator control in legends, and label placement arguments.
What is webchem?
Adding chemical databases with one hand while public ones close programmatic access with the other.
webchem is the R interface to public chemical data — retrieving identifiers, properties and structures across roughly a dozen web services. Its release history reads as a running account of which of those services still allow automated access. Version 1.3.0 removed two functions outright because their sources withdrew: ChemIDplus was retired by the NLM, and PAN stopped supporting programmatic access. Version 1.3.1 continues the pattern, updating URLs that stopped working and noting that ChemSpider InChIKey validation now requires an API key like the rest of that provider's endpoints.
mapsf vs webchem: editorial side-by-side
mapsf
0.0ANALYTICS
Thematic mapping in base R that finally got a theming system, then spent two years polishing legends.
◆ Current state
mapsf produces thematic maps on R's base graphics device — choropleths, proportional symbols, typology maps, rasters, and their combinations, with legends, scale bars, north arrows, and insets as composable elements. Version 1.0.0 was the structural release, introducing a theming system that deprecated eight scattered styling arguments and adding mf_png() and mf_svg() export helpers plus alpha transparency across map types. The 1.1.x and 1.2.x line since then has been steady refinement: background and extent control on the drawing functions, decimal and thousands-separator control in legends, and label placement arguments.
◆ Where it's heading
The package has been consolidating control into fewer, more consistent places. Legend handling moved out to the maplegend package in 0.8.0 and the per-element mf_legend_* functions were deprecated in favor of arguments on the map calls themselves; theming replaced ad-hoc style arguments in 1.0.0; and recent releases keep propagating the same argument vocabulary — bg, extent, leg_val_rnd, leg_val_dec, leg_val_big — across every function that should accept it. Determinism is a visible concern too, with 1.2.1 fixing a seed so mf_distr() point positions stop moving between runs.
◆ Prediction
The recent releases are almost entirely argument-parity work across existing functions, so expect that to continue until the vocabulary is uniform rather than any new map type appearing.
webchem
0.0ANALYTICS
Adding chemical databases with one hand while public ones close programmatic access with the other.
◆ Current state
webchem is the R interface to public chemical data — retrieving identifiers, properties and structures across roughly a dozen web services. Its release history reads as a running account of which of those services still allow automated access. Version 1.3.0 removed two functions outright because their sources withdrew: ChemIDplus was retired by the NLM, and PAN stopped supporting programmatic access. Version 1.3.1 continues the pattern, updating URLs that stopped working and noting that ChemSpider InChIKey validation now requires an API key like the rest of that provider's endpoints.
◆ Where it's heading
Two opposing forces run through these entries. The package keeps widening its coverage — ChEMBL in 1.2.0, LIPID MAPS and SwissLipids identifiers via Wikidata, structure images, Mol export — while the open, unauthenticated end of the chemical web keeps contracting. The other consistent thread is interface harmonisation: successive releases have converged the get_* functions on the same query and from arguments, tibble returns, and CAS reformatting, so the package feels like one interface rather than a dozen wrappers.
◆ Prediction
Expect further defunct functions and URL repairs as more providers move behind keys or shut down, alongside occasional additions of sources that remain open. The entries show no sign of a general credential-management layer, which is what a package facing this trend would eventually need.
Alternatives to mapsf and webchem
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 mapsf or webchem.
S7
S7 has stopped adding surface and started proving it holds up against R itself.
torchvision
R's torchvision is porting PyTorch's vision stack one task at a time — instance segmentation just landed.
datefixR
The messy-date parser rewrote its core in Rust and came out 300x faster.
maplegend
The legend engine mapsf spun out, now covering legend types the parent map package can draw.
lang
R help pages translated on demand by whichever LLM you point it at.
See all mapsf alternatives → · See all webchem alternatives →
Recent activity from mapsf and webchem
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1mo agomapsfLabel placement arguments and deterministic distribution plots
- 2mo agomapsfBackground and extent control across the drawing functions
- 7mo agomapsfPNG resolution control and legend number formatting
- 1y agowebchemRepairs broken URLs; ChemSpider check now needs a key
- 1y agomapsf1.0.0 introduces theming and deprecates eight style arguments ⚡
- 1y agomapsfPencil-sketch layers, ckmeans breaks, and border extraction
- 2y agomapsfGraticule label display fix
- 3y agowebchemChemIDplus and PAN queries removed as sources shut down ⚡
- 3y agowebchemAdds ChEMBL access for bioactive compound data
- 4y agowebchemcir_query() returns a tibble, a breaking change
- 4y agowebchemAdds Mol structure export; aw_query renamed to bcpc_query
- 5y agowebchemFetches LIPID MAPS and SwissLipids identifiers from Wikidata
Frequently asked questions
What is the difference between mapsf and webchem?
They serve adjacent needs but don't currently overlap on shipped themes. mapsf and webchem 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 mapsf better than webchem?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. mapsf and webchem 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 mapsf?
Top mapsf alternatives in Analytics are ranked by recent ship velocity. Browse the "mapsf alternatives" section above for the current picks, or visit /alternatives/mapsf for the full list with editorial commentary on each.
What are the best alternatives to webchem?
Top webchem alternatives in Analytics are ranked by recent ship velocity. Browse the "webchem alternatives" section above for the current picks, or visit /alternatives/webchem for the full list with editorial commentary on each.