11library : letsplot
22specification_id : stereonet-equal-area
33created : ' 2026-03-15T23:03:21Z'
4- updated : ' 2026-03-15T23:19:07Z '
4+ updated : ' 2026-03-15T23:31:45Z '
55generated_by : claude-opus-4-5-20251101
66workflow_run : 23121189167
77issue : 4576
@@ -10,81 +10,80 @@ library_version: 4.9.0
1010preview_url : https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/letsplot/plot.png
1111preview_thumb : https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/letsplot/plot_thumb.png
1212preview_html : https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/letsplot/plot.html
13- quality_score : 84
13+ quality_score : 85
1414review :
1515 strengths :
16- - Mathematically correct Lambert azimuthal equal-area projection implemented from
17- scratch
18- - Excellent data quality with four realistic geological feature types at distinct
19- orientations
20- - ' Good visual hierarchy: great circles (faint) to poles (visible) to mean poles
21- (emphasized diamonds)'
22- - Density contours via geom_density2d effectively highlight clustering
23- - Mean pole annotations with circular-mean strike/dip values add geological context
24- - Interactive tooltips via layer_tooltips showing strike/dip per pole
16+ - ' Excellent projection math: correct Lambert azimuthal equal-area implementation
17+ for both poles and great circles'
18+ - ' Strong spec compliance: all required features including density contours, great
19+ circles, poles, tick marks, and cardinal labels'
20+ - Sophisticated data storytelling with mean pole annotations, confidence ellipses,
21+ and clear visual hierarchy
22+ - Colorblind-safe palette and good alpha blending for layered elements
23+ - Clean, well-structured code despite mathematical complexity
2524 weaknesses :
26- - Great circle arcs extend beyond the primitive circle boundary (need clipping to
27- unit circle)
28- - Mean pole annotation labels (size 11) are small and overlap with nearby data points
29- - Legend placement offsets the stereonet from visual center
25+ - Minor label overlap near E cardinal direction with Joint mean annotation
26+ - Legend positioned outside circle creates slight layout asymmetry
27+ - Great circles extend slightly beyond primitive circle in some areas
3028 image_description : ' The plot displays a Schmidt equal-area (lower-hemisphere) stereonet
31- projection on a white/light gray circular canvas. The primitive circle is drawn
32- as a thick black outline with tick marks every 10 degrees (longer every 30 degrees)
33- around the perimeter. Cardinal directions N, E, S, W are labeled in bold black
34- text outside the circle. Dashed light gray reference cross-lines mark the N-S
35- and E-W axes. Four feature types are plotted: Bedding (blue ), Joint (pink), Fault
36- (amber ), and Foliation (green). Great circles are drawn as thin colored arcs at
37- low opacity. Poles to planes appear as colored dots clustered in distinct groups.
38- Gray density contours overlay the pole data highlighting preferred orientations.
39- Dark diamond markers with italic labels show mean pole positions with circular-mean
40- strike/dip values (Bedding 43/33, Joint 356/78, Fault 151/55, Foliation 268/28).
41- A legend titled Feature Type appears on the right side. The title stereonet-equal-area
42- letsplot pyplots.ai is centered at the top .'
29+ projection on a square canvas. A dark primitive circle forms the boundary with
30+ tick marks every 10 degrees around the perimeter. Cardinal directions (N, E, S,
31+ W) are labeled in bold. Dashed light-gray reference lines cross at the center
32+ (N-S and E-W). Four geological feature types are plotted: Bedding (blue, clustered
33+ in the S-SE area), Joint (pink, clustered near E ), Fault (orange/yellow, clustered
34+ in the SW area ), and Foliation (green/teal, clustered in the NW area). Poles to
35+ planes appear as colored dots, great circles as thin transparent curved lines,
36+ and gray density contours overlay the pole data. Semi-transparent confidence ellipses
37+ surround each cluster. Dark diamond markers indicate mean pole positions, with
38+ italic labels showing mean strike/dip values (e.g., " Bedding 43/33", " Joint 356/78",
39+ "Fault 151/55", "Foliation 268/28"). A legend on the right identifies the four
40+ feature types. The background is a subtle off-white (#FAFAFA) .'
4341 criteria_checklist :
4442 visual_quality :
4543 score : 25
4644 max : 30
4745 items :
4846 - id : VQ-01
4947 name : Text Legibility
50- score : 6
48+ score : 7
5149 max : 8
5250 passed : true
53- comment : Font sizes explicitly set (title 24, legend 18/16, cardinal 18).
54- Mean pole labels at size 11 are small .
51+ comment : Font sizes explicitly set (title= 24, legend= 18/16, cardinal=18, mean
52+ labels=14). All readable .
5553 - id : VQ-02
5654 name : No Overlap
57- score : 5
55+ score : 4
5856 max : 6
59- passed : true
60- comment : Minor overlap between mean pole labels and nearby data points.
57+ passed : false
58+ comment : Minor overlap between Joint 356/78 label and E cardinal direction
59+ label.
6160 - id : VQ-03
6261 name : Element Visibility
6362 score : 5
6463 max : 6
6564 passed : true
66- comment : Poles well-sized. Great circles subtle at alpha 0.3. Some arcs extend
67- beyond primitive circle .
65+ comment : Poles well-sized (size=5, alpha=0.85), great circles appropriately
66+ subtle .
6867 - id : VQ-04
6968 name : Color Accessibility
7069 score : 4
7170 max : 4
7271 passed : true
73- comment : Excellent colorblind-safe palette with good contrast .
72+ comment : Excellent colorblind-safe Okabe-Ito palette .
7473 - id : VQ-05
7574 name : Layout & Canvas
7675 score : 3
7776 max : 4
7877 passed : true
79- comment : Square aspect ratio appropriate. Legend offsets stereonet slightly
80- from center .
78+ comment : Good square canvas with coord_fixed. Slight asymmetry from right-side
79+ legend .
8180 - id : VQ-06
8281 name : Axis Labels & Title
8382 score : 2
8483 max : 2
8584 passed : true
86- comment : Title correctly formatted. Cardinal directions serve as orientation
87- labels.
85+ comment : Axes appropriately hidden for stereonet; cardinal directions serve
86+ as labels.
8887 design_excellence :
8988 score : 13
9089 max : 20
@@ -94,22 +93,22 @@ review:
9493 score : 5
9594 max : 8
9695 passed : true
97- comment : Custom palette, intentional hierarchy, subtle background. Above defaults
98- but not publication-quality .
96+ comment : Above defaults with Okabe-Ito palette, confidence ellipses, diamond
97+ mean markers, italic labels .
9998 - id : DE-02
10099 name : Visual Refinement
101100 score : 4
102101 max : 6
103102 passed : true
104- comment : All axes /grid removed, manual stereonet elements, subtle reference
105- lines. Good refinement .
103+ comment : Axes /grid removed, subtle background, well-designed tick marks with
104+ 30-degree emphasis .
106105 - id : DE-03
107106 name : Data Storytelling
108107 score : 4
109108 max : 6
110109 passed : true
111- comment : Mean pole annotations and density contours guide the viewer. Visual
112- hierarchy creates reading order .
110+ comment : Mean annotations with strike/dip create focal points. Clear visual
111+ hierarchy across layers .
113112 spec_compliance :
114113 score : 15
115114 max : 15
@@ -119,26 +118,26 @@ review:
119118 score : 5
120119 max : 5
121120 passed : true
122- comment : Correct Schmidt equal-area lower-hemisphere stereonet .
121+ comment : Correct equal-area Schmidt net lower-hemisphere projection .
123122 - id : SC-02
124123 name : Required Features
125124 score : 4
126125 max : 4
127126 passed : true
128- comment : ' All spec features present : great circles, poles, density contours,
129- ticks, color-coding, legend .'
127+ comment : ' All features: great circles, poles, density contours, color coding ,
128+ legend, tick marks, cardinal labels .'
130129 - id : SC-03
131130 name : Data Mapping
132131 score : 3
133132 max : 3
134133 passed : true
135- comment : Strike/dip correctly mapped through equal-area projection.
134+ comment : Strike/dip correctly converted to equal-area projection coordinates .
136135 - id : SC-04
137136 name : Title & Legend
138137 score : 3
139138 max : 3
140139 passed : true
141- comment : Title format correct. Legend Feature Type with matching labels.
140+ comment : Correct title format and legend labels.
142141 data_quality :
143142 score : 15
144143 max : 15
@@ -148,19 +147,19 @@ review:
148147 score : 6
149148 max : 6
150149 passed : true
151- comment : Four distinct structural feature types with different orientations.
150+ comment : Four distinct feature types with varied orientations and dip angles .
152151 - id : DQ-02
153152 name : Realistic Context
154153 score : 5
155154 max : 5
156155 passed : true
157- comment : Realistic structural geology field campaign data .
156+ comment : Authentic structural geology mapping scenario .
158157 - id : DQ-03
159158 name : Appropriate Scale
160159 score : 4
161160 max : 4
162161 passed : true
163- comment : 70 measurements within 30-200 range, proper strike/dip values .
162+ comment : Realistic strike azimuths and dip angles per feature type .
164163 code_quality :
165164 score : 10
166165 max : 10
@@ -170,7 +169,7 @@ review:
170169 score : 3
171170 max : 3
172171 passed : true
173- comment : Flat script structure.
172+ comment : ' Clean linear structure: imports, data, projection, plot, save. '
174173 - id : CQ-02
175174 name : Reproducibility
176175 score : 2
@@ -182,36 +181,38 @@ review:
182181 score : 2
183182 max : 2
184183 passed : true
185- comment : All imports used, specific imports .
184+ comment : All imports used.
186185 - id : CQ-04
187186 name : Code Elegance
188187 score : 2
189188 max : 2
190189 passed : true
191- comment : Well-structured, clear naming, no fake UI.
190+ comment : Well-organized projection math with eigenvalue decomposition for
191+ ellipses.
192192 - id : CQ-05
193193 name : Output & API
194194 score : 1
195195 max : 1
196196 passed : true
197- comment : ggsave to plot.png with scale=3.
197+ comment : Saves as plot.png via ggsave with scale=3.
198198 library_mastery :
199- score : 6
199+ score : 7
200200 max : 10
201201 items :
202202 - id : LM-01
203203 name : Idiomatic Usage
204204 score : 4
205205 max : 5
206206 passed : true
207- comment : Good ggplot grammar, layer_tooltips, coord_fixed, theme customization.
207+ comment : Good ggplot grammar with layered geoms, aesthetics, scales, themes.
208+ Proper geom_density2d usage.
208209 - id : LM-02
209210 name : Distinctive Features
210- score : 2
211+ score : 3
211212 max : 5
212- passed : false
213- comment : Uses layer_tooltips and geom_density2d but mostly manual geometry
214- construction .
213+ passed : true
214+ comment : Uses layer_tooltips() for interactive hover, geom_density2d with
215+ kernel/adjust, HTML export .
215216 verdict : REJECTED
216217impl_tags :
217218 dependencies : []
@@ -224,8 +225,7 @@ impl_tags:
224225 patterns :
225226 - data-generation
226227 - iteration-over-groups
227- dataprep :
228- - kde
228+ dataprep : []
229229 styling :
230230 - minimal-chrome
231231 - alpha-blending
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