# Optional estimated scale: evidence and method

Generated 2026-10-29. This companion artifact covers every SVG that the catalogue excludes from verified true scale. It changes no catalogue measurement, source row, date, classification or SVG.

## Coverage and validation

There are **61 estimates**, covering all 61 unresolved SVGs; the 436 eligible SVGs continue to use their catalogue dimensions. All estimated axes are finite and positive. Every estimated width/height ratio matches its original SVG ratio within 0.001%. A repeated run over identical input yields identical output. Numerical precision preserves that ratio and does not imply measurement certainty.

The JSON stores each estimate’s method, confidence, reason, anchor, source evidence, comparison IDs and numerical comparison samples. Its input catalogue SHA-256 identifies the exact source snapshot. The same artifact is copied to `site/dist/data/scale-estimates.json` for the optional gallery control.

## Decision order

1. Use work-level reported dimensions or a credible single axis while preserving the existing SVG aspect. Framed-only axes remain framed-size proxies. Conflicting orientation is labeled as an inferred axis, never silently corrected.
2. Use known component heights or widths for separated/stacked works. Series of Five Paintings anchors its stacked comparison by one 356 cm-wide component; it is not assigned a single 178 cm height for all five parts. SFMOMA and Walker component heights scale their shown panels and the chosen gaps.
3. For floor projections, anchor the visible long span to reported plan long edges, deriving the shorter projected span. This prevents an oblique 5.4:1 image from becoming nearly 39 m wide merely because its plan short axis exceeds 7 m. Such dimensions are display proxies, not floor plans or wall measurements.
4. Where axes are absent, use the median long edge of nearby measured works, selected deterministically by shape/title family, date context, support and aspect. Early works have an early-period pool; studies and painted paper have a small-study pool. Unknown creation years may use nearby explicit EK numbers as comparison-selection context only; no factual year is assigned. Comparisons do not establish physical identity.

## Substantive outlier checks

- Grand Rapids Blue White uses the median **height** of two measured monumental paintings, 528.3 and 635 cm: approximately 5.82 m high. The very wide 18-panel Color Panels for a Large Wall installation is excluded from that vertical prior.
- Black White Black, EK 951, is recognized as a three-panel horizontal work. Its estimated height comes from seven nearby measured three-joined-panel paintings, rather than shrinking the whole triptych to the long edge of one small panel.
- Tate Yellow Curve’s long reported axis is explicitly transferred to an estimated vertical axis because the official image contradicts the published orientation. Neither the source dimensions nor the image is changed.
- FLV Colored Panels retains only the five pictured components. The median of component-long-edge/projected-span ratios gives a single cautious display scale; the giant 1117.6 cm yellow panel is included. The missing sixth panel is neither drawn nor estimated. Different wall planes prevent a common projection from being a room survey.
- Independent reinspection of the Sanary printed caption corrected the earlier OCR fraction: **51½ × 60 inches**, giving a 130.81 cm height anchor. Black Square with Red’s 91¾-inch width was also checked against its actual caption. Both anchors link to the precise PDF page.
- Barge remains a very-low-confidence early-period comparison. Local MoMA/Guggenheim text search found no usable dimensions for this exact EK 78 work; a different huge same-title work was not substituted.

## Confidence

“Medium” means a published work/component axis anchors the drawing, with the original geometry or installation qualification still unresolved. “Low” covers conflicting axes, floor projections, secondary measurements or inconsistent component projections. “Very low” covers size analogies. None is relabeled a verified physical measurement.

The independent museum agent checked source anchors, stacked groups, early studies, floor projections and architectural outliers. The two material analogy outliers above were corrected before freezing. No new internet lookup was necessary; the artifact uses already preserved catalogue evidence and references.

## Exported estimates

| Work ID | Height × width, cm | Method | Confidence | Basis |
|---|---:|---|---|---|
| international-v4-kroller-plant-i | 72.4 × 56.7 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by early plant, date context, support and aspect is 72.4 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| north-v4-philadelphia-seaweed | 72.7 × 100.3 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by early plant, date context, support and aspect is 100.3 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| moma1973-pdf40-caption2 | 99.1 × 118.1 | reported height anchor | medium | Use this work’s reported height 99.1 cm and derive width from its SVG aspect. Any projection, spacing or source qualification remains unresolved; this estimate does not make the measurement formally true-scale eligible. |
| moma1973-pdf42-caption1 | 64.8 × 85.6 | reported height anchor | medium | Use this work’s reported height 64.77 cm and derive width from its SVG aspect. Any projection, spacing or source qualification remains unresolved; this estimate does not make the measurement formally true-scale eligible. |
| foundation-exhib-v4-ek29-kelly-peintures-et-reliefs | 89.9 × 224.2 | secondary dimension anchor | low | University thesis figure 25 reports 83.8×224.2 cm. Use its long width 224.2 cm, with the observed SVG aspect; this is explicitly secondary evidence rather than a verified catalogue measurement. |
| moma1973-pdf57-caption1 | 130.8 × 152.6 | historical caption anchor | medium | The independently re-inspected 1973 printed caption is 51½×60 inches (earlier OCR misread the fraction). Use 51½ inches as height; the seven-column/six-row SVG is retained, so its width is derived rather than forced to 60 inches. |
| whitney-9295 | 91.4 × 310.2 | component height anchor | medium | Tallest panel height is 91.4 cm; scale the observed five-panel arrangement by that height. Published overall width 356.4 cm includes a different/unspecified arrangement. |
| christies-5623231 | 35.2 × 32.0 | inferred axis anchor | low | Both sale captions report landscape 27.6×35.2 cm while both actual photographs show a portrait sheet. Use the reported long edge 35.2 cm vertically and preserve the observed portrait aspect; no factual dimension is changed. |
| north-v4-yale-charter | 198.1 × 124.7 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 198.12 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| gap-blue-white-1962 | 205.9 × 212.1 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 212.1 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| international-v4-stedelijk-blue-green-red-i | 133.7 × 152.4 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 152.4 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| international-v4-ulm-orange-blue | 170.0 × 153.0 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 170 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| nga-au-orange-curve-116211 | 203.2 × 159.7 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 203.2 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| ek-348 | 218.4 × 148.5 | floor plan long edge anchor | low | Use a robust median of this work’s reported plan long edges as the SVG’s visible long span. The shorter projected axis is derived from the existing oblique SVG, not equated with the floor-plan short edge. |
| ek-350 | 208.3 × 480.1 | component height anchor | medium | Foundation 82×189 in overall record supplies 208.28 cm height. Keep that vertical anchor and the SVG spacing; no claim that all reinstalls have the same gaps. |
| north-v4-philadelphia-black-red-orange | 228.6 × 158.4 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 228.6 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| ek-356 | 205.7 × 144.0 | floor plan long edge anchor | low | Use a robust median of this work’s reported plan long edges as the SVG’s visible long span. The shorter projected axis is derived from the existing oblique SVG, not equated with the floor-plan short edge. |
| north-v4-vmfa-four-panels | 132.7 × 257.0 | component height anchor | medium | Each of four panels is 132.7 cm high. All four share the SVG full height; gaps remain its observed approximate gaps. |
| international-v4-tate-red-white-1966 | 165.4 × 229.5 | reported height anchor | medium | Use this work’s reported height 165.4 cm and derive width from its SVG aspect. Any projection, spacing or source qualification remains unresolved; this estimate does not make the measurement formally true-scale eligible. |
| museum-v2-walker-red-yellow-blue-iii | 179.1 × 584.0 | component height anchor | medium | Published 70½ inches=179.07 cm is EACH panel height; three panels remain side by side, not three heights stacked. |
| moma1973-pdf86-caption1 | 975.4 × 356.0 | component width anchor | medium | Each painting is 178×356 cm. The SVG stacks five parts; anchor its full width to one 356 cm-wide component, making the whole display tall enough for five 178 cm parts and its chosen gaps. This is a comparison layout, not a fixed physical installation. |
| mfa-blue-green-yellow-orange-red-1968 | 304.8 × 688.3 | reported height anchor | medium | Use this work’s reported height 304.8 cm and derive width from its SVG aspect. Any projection, spacing or source qualification remains unresolved; this estimate does not make the measurement formally true-scale eligible. |
| buffalo-k1969-3 | 256.5 × 112.1 | reported long edge anchor | low | Reported 256.54×76.2 cm disagrees with the SVG aspect. Preserve the larger reported edge 256.54 cm as the displayed long edge; derive its other axis without distorting the SVG. |
| international-v4-louisiana-yellow-black | 239.5 × 281.0 | reported height anchor | medium | Use this work’s reported height 239.5 cm and derive width from its SVG aspect. Only framed extent is published, so this is an upper-bound proxy for the unframed work. |
| museum-v2-walker-yellow-red | 188.0 × 261.6 | reported height anchor | medium | Use this work’s reported height 187.96 cm and derive width from its SVG aspect. Only framed extent is published, so this is an upper-bound proxy for the unframed work. |
| moma1973-pdf95-caption1 | 198.1 × 233.0 | historical caption anchor | medium | The already-reviewed 1973 caption gives the joined squares an outer span 91¾×78 inches. Anchor the 91¾ inch width; the observed joined-square aspect is retained. |
| ek-458 | 274.3 × 222.7 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by chatham, date context, support and aspect is 274.3 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| ek-459 | 274.3 × 248.2 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by chatham, date context, support and aspect is 274.3 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| ek-464 | 274.3 × 246.9 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by chatham, date context, support and aspect is 274.3 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| guggenheim1996-essay-37-fig-34b | 227.0 × 272.4 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by panel, date context, support and aspect is 272.415 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| north-v4-dallas-red-panel | 287.0 × 228.5 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by panel, date context, support and aspect is 287 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| moca-v3-red-orange | 232.4 × 287.0 | reported height anchor | medium | Use this work’s reported height 232.41 cm and derive width from its SVG aspect. Any projection, spacing or source qualification remains unresolved; this estimate does not make the measurement formally true-scale eligible. |
| guggenheim1996-essay-68-fig-2b | 225.6 × 281.9 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 281.94 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| international-v4-stedelijk-blue-curve-vi | 216.9 × 281.9 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 281.94 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| guggenheim1996-essay-68-fig-2a | 170.9 × 281.9 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 281.94 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| guggenheim1996-essay-68-fig-2c | 201.4 × 281.9 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 281.94 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| matthewmarks-8332-1 | 290.0 × 1046.0 | reported height anchor | medium | Use this work’s reported height 290 cm and derive width from its SVG aspect. Any projection, spacing or source qualification remains unresolved; this estimate does not make the measurement formally true-scale eligible. |
| international-v4-saint-etienne-blue-diagonal-curve | 273.1 × 237.0 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by diagonal, date context, support and aspect is 273.1 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| north-v4-slam-purple-panel | 280.7 × 209.4 | reported long edge anchor | low | Reported 280.67×280.67 cm disagrees with the SVG aspect. Preserve the larger reported edge 280.67 cm as the displayed long edge; derive its other axis without distorting the SVG. |
| artic-v4-152761 | 212.3 × 189.8 | inferred axis anchor | low | Primary 189.5×212.3 cm is landscape while the inspected SVG is portrait with almost reciprocal aspect. Use the larger 212.3 cm as estimated vertical extent, explicitly inferring the axis rather than asserting a measurement correction. |
| ek-808 | 145.3 × 784.9 | floor plan long edge anchor | low | Use a robust median of this work’s reported plan long edges as the SVG’s visible long span. The shorter projected axis is derived from the existing oblique SVG, not equated with the floor-plan short edge. |
| international-v4-maeght-blue-floor-panel-leo | 845.1 × 1463.0 | floor plan long edge anchor | low | Use a robust median of this work’s reported plan long edges as the SVG’s visible long span. The shorter projected axis is derived from the existing oblique SVG, not equated with the floor-plan short edge. |
| ek-835 | 216.0 × 1216.0 | floor plan long edge anchor | low | Use a robust median of this work’s reported plan long edges as the SVG’s visible long span. The shorter projected axis is derived from the existing oblique SVG, not equated with the floor-plan short edge. |
| sfmoma-501-2 | 160.0 × 462.3 | component height anchor | medium | Each panel is 160.02 cm high. The SVG uses the museum essay’s suggested 18 inch intervals; this produces one possible overall installation width. |
| matthewmarks-blue-panel-1996-3729 | 139.7 × 105.5 | conflicting source height anchor | low | Caption 55×52 inches versus 140×142 cm agrees on height near 140 cm but contradicts width. Anchor 55 inch height and derive width from the SVG; the chosen width is an estimate, not a correction to the source. |
| tate-26107 | 355.6 × 214.5 | inferred axis anchor | low | Primary 135.7×355.6 cm conflicts strongly with the tall official-image silhouette. Use reported long edge 355.6 cm as the estimated vertical extent; this inferred axis and derived width remain uncertain. |
| gap-blue-white-2006 | 581.6 × 150.7 | architectural height comparison | very low | No work-level dimensions for this monumental lobby commission. Median measured HEIGHT of two monumental paintings (528.3 and 635 cm) gives a conservative 581.65 cm vertical prior. A 27.4 m-wide 18-panel installation is deliberately excluded as a poor height analogue. The photographed oblique projection remains unchanged. |
| matthewmarks-white-curve-in-relief-over-white-belle-ile-2013-39467 | 105.6 × 188.0 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 188 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| international-v4-flv-colored-panels | 1250.1 × 2556.1 | partial installation component median | low | Take the median of five physical-component long edges divided by their drawn long spans, then apply that single scale to the five-panel SVG. Different wall planes make these ratios inconsistent; the median is a cautious display guess, not a room survey. The tall 1117.6 cm yellow component is included; a generic 3 m default would be inappropriate. |
| foundation-exhib-v4-ek78-ellsworth-kelly-paris-new-york-1949-1959 | 133.9 × 160.7 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 160.655 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek946-ellsworth-kelly-curated-by-jack-shear | 185.5 × 204.0 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by relief, date context, support and aspect is 204 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek951-ellsworth-kelly-sculpture-on-the-wall | 204.0 × 540.6 | joined panel height comparison | very low | No dimensions for this three-panel horizontal work. Use median measured HEIGHT of seven nearby three-joined-panel paintings, rather than assigning the long edge of a small single panel to the entire triptych. Date 2006 is only EK-neighbour context; no creation date or medium is asserted. Overall width follows the SVG’s observed three-panel layout. |
| foundation-exhib-v4-ek182-ellsworth-kelly-curated-by-jack-shear | 40.6 × 32.5 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by small studies / painted paper, date context, support and aspect is 40.64 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek746-ellsworth-kelly-sculpture-on-the-wall | 169.8 × 281.9 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 281.94 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek180-ellsworth-kelly-curated-by-jack-shear | 42.0 × 35.7 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by small studies / painted paper, date context, support and aspect is 42 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek1046-ellsworth-kelly-sculpture-on-the-wall | 127.0 × 188.0 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 188 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek246-ellsworth-kelly-a-retrospective | 152.9 × 74.9 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 152.876 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek1024-ellsworth-kelly-curated-by-jack-shear | 191.0 × 143.2 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by curve, date context, support and aspect is 191 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek82-ellsworth-kelly-paris-new-york-1949-1959 | 111.8 × 83.8 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by rectangle, date context, support and aspect is 111.8 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek2-ellsworth-kelly-paris-new-york-1949-1959 | 80.0 × 100.0 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by relief, date context, support and aspect is 100.013 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |
| foundation-exhib-v4-ek176-ellsworth-kelly-curated-by-jack-shear | 30.1 × 40.6 | comparable median long edge | very low | No usable work-level dimensions. Median long edge of 7 nearby confirmed/measured comparators selected by small studies / painted paper, date context, support and aspect is 40.64 cm. This is a size prior, not an identity join or evidence of this work’s measurement. |