11library : letsplot
22specification_id : stereonet-equal-area
33created : ' 2026-03-15T23:03:21Z'
4- updated : ' 2026-03-15T23:31:45Z '
4+ updated : ' 2026-03-15T23:40:09Z '
55generated_by : claude-opus-4-5-20251101
66workflow_run : 23121189167
77issue : 4576
@@ -10,105 +10,108 @@ 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 : 85
13+ quality_score : 88
1414review :
1515 strengths :
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
16+ - Mathematically correct equal-area projection with proper Lambert azimuthal formulas
17+ - ' Comprehensive feature set: great circles, poles, density contours, confidence
18+ ellipses, mean annotations '
19+ - Excellent colorblind-safe palette following Okabe-Ito conventions
20+ - Smart label nudge logic to avoid overlap with cardinal direction labels
21+ - Interactive tooltips on poles showing strike/dip values (lets-plot distinctive
22+ feature)
23+ - Clean, professional visual design with appropriate use of alpha blending and layering
2424 weaknesses :
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
25+ - Density contours (geom_density2d) extend beyond the primitive circle boundary,
26+ creating visual noise outside the stereonet
27+ - Mean annotation label font size (14) is slightly small relative to other text
28+ elements
29+ - Joint cluster labels crowd near the E cardinal label despite nudge logic
2830 image_description : ' The plot displays a Schmidt equal-area (lower-hemisphere) stereonet
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).'
31+ projection on a white/light gray circular canvas. Four geological feature types
32+ are plotted as colored poles (dots): Bedding (blue, clustered in the lower-center),
33+ Joint (pink, clustered on the right near E), Fault (amber/orange, in the lower-left),
34+ and Foliation (teal/green, near the top-center). Great circles are drawn as thin,
35+ semi-transparent colored arcs for each measurement. Gray density contours (geom_density2d)
36+ overlay the pole data showing clustering patterns. Each cluster has a semi-transparent
37+ confidence ellipse fill and a dark diamond-shaped mean pole marker with italic
38+ annotation showing mean strike/dip (Bedding 43/33, Joint 356/78, Fault 151/55,
39+ Foliation 268/28). The primitive circle boundary is drawn in dark gray with tick
40+ marks every 10 degrees (longer every 30 degrees). Cardinal directions N, E, S,
41+ W are labeled in bold. Dashed reference cross lines mark N-S and E-W axes. A legend
42+ in the lower-right corner shows Feature Type with all four categories. Title reads
43+ stereonet-equal-area letsplot pyplots.ai in bold at the top.'
4144 criteria_checklist :
4245 visual_quality :
43- score : 25
46+ score : 26
4447 max : 30
4548 items :
4649 - id : VQ-01
4750 name : Text Legibility
4851 score : 7
4952 max : 8
5053 passed : true
51- comment : Font sizes explicitly set (title=24, legend=18/16, cardinal =18, mean
52- labels=14 ). All readable .
54+ comment : All font sizes explicitly set (title=26, cardinal=20, legend title =18,
55+ legend text=16 ). Mean annotation labels at size=14 slightly small .
5356 - id : VQ-02
5457 name : No Overlap
55- score : 4
58+ score : 5
5659 max : 6
57- passed : false
58- comment : Minor overlap between Joint 356/78 label and E cardinal direction
59- label .
60+ passed : true
61+ comment : Joint label close to E cardinal label. Density contours extend beyond
62+ primitive circle .
6063 - id : VQ-03
6164 name : Element Visibility
6265 score : 5
6366 max : 6
6467 passed : true
65- comment : Poles well-sized (size=5, alpha=0.85), great circles appropriately
66- subtle .
68+ comment : Poles visible (size=5, alpha=0.85). Great circles appropriately subtle.
69+ Mean diamonds prominent .
6770 - id : VQ-04
6871 name : Color Accessibility
6972 score : 4
7073 max : 4
7174 passed : true
72- comment : Excellent colorblind-safe Okabe-Ito palette .
75+ comment : Excellent colorblind-safe palette following Okabe-Ito conventions .
7376 - id : VQ-05
7477 name : Layout & Canvas
7578 score : 3
7679 max : 4
7780 passed : true
78- comment : Good square canvas with coord_fixed. Slight asymmetry from right-side
79- legend .
81+ comment : Square canvas appropriate for stereonet. Density contours bleed beyond
82+ primitive circle boundary .
8083 - id : VQ-06
8184 name : Axis Labels & Title
8285 score : 2
8386 max : 2
8487 passed : true
85- comment : Axes appropriately hidden for stereonet; cardinal directions serve
86- as labels .
88+ comment : Axes correctly blank for stereonet. Cardinal directions serve as
89+ orientation markers .
8790 design_excellence :
88- score : 13
91+ score : 15
8992 max : 20
9093 items :
9194 - id : DE-01
9295 name : Aesthetic Sophistication
93- score : 5
96+ score : 6
9497 max : 8
9598 passed : true
96- comment : Above defaults with Okabe-Ito palette, confidence ellipses, diamond
97- mean markers, italic labels .
99+ comment : Custom colorblind-safe palette, confidence ellipses, italic mean
100+ annotations, diamond markers, clean legend .
98101 - id : DE-02
99102 name : Visual Refinement
100- score : 4
103+ score : 5
101104 max : 6
102105 passed : true
103- comment : Axes/ grid removed, subtle background, well-designed tick marks with
104- 30-degree emphasis .
106+ comment : All axes/ticks/ grid removed. Subtle dashed reference lines. Custom
107+ perimeter ticks. Clean background .
105108 - id : DE-03
106109 name : Data Storytelling
107110 score : 4
108111 max : 6
109112 passed : true
110- comment : Mean annotations with strike/dip create focal points. Clear visual
111- hierarchy across layers .
113+ comment : Mean annotations with strike/dip guide interpretation. Confidence
114+ ellipses show spread. Clear visual groupings .
112115 spec_compliance :
113116 score : 15
114117 max : 15
@@ -118,14 +121,15 @@ review:
118121 score : 5
119122 max : 5
120123 passed : true
121- comment : Correct equal-area Schmidt net lower-hemisphere projection.
124+ comment : Correct Schmidt equal-area lower-hemisphere stereonet with Lambert
125+ azimuthal math.
122126 - id : SC-02
123127 name : Required Features
124128 score : 4
125129 max : 4
126130 passed : true
127- comment : ' All features: great circles, poles, density contours, color coding ,
128- legend, tick marks, cardinal labels .'
131+ comment : ' All required features present : great circles, poles, density contours,
132+ color-coding, legend, tick marks, N label .'
129133 - id : SC-03
130134 name : Data Mapping
131135 score : 3
@@ -137,7 +141,7 @@ review:
137141 score : 3
138142 max : 3
139143 passed : true
140- comment : Correct title format and legend labels .
144+ comment : Title in correct format. Legend shows all four feature types .
141145 data_quality :
142146 score : 15
143147 max : 15
@@ -147,19 +151,20 @@ review:
147151 score : 6
148152 max : 6
149153 passed : true
150- comment : Four distinct feature types with varied orientations and dip angles.
154+ comment : Four distinct structural features with different orientations and
155+ dip angles.
151156 - id : DQ-02
152157 name : Realistic Context
153158 score : 5
154159 max : 5
155160 passed : true
156- comment : Authentic structural geology mapping scenario .
161+ comment : Realistic geological structural data from a field mapping campaign .
157162 - id : DQ-03
158163 name : Appropriate Scale
159164 score : 4
160165 max : 4
161166 passed : true
162- comment : Realistic strike azimuths and dip angles per feature type.
167+ comment : Strike 0-360 degrees, dip values appropriate per feature type.
163168 code_quality :
164169 score : 10
165170 max : 10
@@ -169,32 +174,31 @@ review:
169174 score : 3
170175 max : 3
171176 passed : true
172- comment : ' Clean linear structure : imports, data, projection, plot, save.'
177+ comment : ' Linear flow : imports, data, projection, plot, save. No functions/classes .'
173178 - id : CQ-02
174179 name : Reproducibility
175180 score : 2
176181 max : 2
177182 passed : true
178- comment : np.random.seed(42) set.
183+ comment : np.random.seed(42) set at beginning .
179184 - id : CQ-03
180185 name : Clean Imports
181186 score : 2
182187 max : 2
183188 passed : true
184- comment : All imports used.
189+ comment : All imports used. Clean explicit imports.
185190 - id : CQ-04
186191 name : Code Elegance
187192 score : 2
188193 max : 2
189194 passed : true
190- comment : Well-organized projection math with eigenvalue decomposition for
191- ellipses.
195+ comment : Well-organized with clear comments. Smart label nudge logic.
192196 - id : CQ-05
193197 name : Output & API
194198 score : 1
195199 max : 1
196200 passed : true
197- comment : Saves as plot.png via ggsave with scale=3.
201+ comment : Saves as plot.png via ggsave with scale=3. Current API.
198202 library_mastery :
199203 score : 7
200204 max : 10
@@ -204,24 +208,24 @@ review:
204208 score : 4
205209 max : 5
206210 passed : true
207- comment : Good ggplot grammar with layered geoms, aesthetics, scales, themes.
208- Proper geom_density2d usage .
211+ comment : Good ggplot2 grammar with layered geom_* calls, aes(), scale_*_manual(),
212+ coord_fixed() .
209213 - id : LM-02
210214 name : Distinctive Features
211215 score : 3
212216 max : 5
213217 passed : true
214- comment : Uses layer_tooltips() for interactive hover, geom_density2d with
215- kernel/adjust, HTML export .
218+ comment : Uses layer_tooltips() for interactive hover, HTML export, geom_density2d
219+ with kernel/adjust.
216220 verdict : REJECTED
217221impl_tags :
218222 dependencies : []
219223 techniques :
220- - layer-composition
224+ - polar-projection
221225 - annotations
226+ - layer-composition
222227 - hover-tooltips
223228 - html-export
224- - polar-projection
225229 patterns :
226230 - data-generation
227231 - iteration-over-groups
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