11library : pygal
22specification_id : stereonet-equal-area
33created : ' 2026-03-15T22:58:45Z'
4- updated : ' 2026-03-15T23:03:14Z '
4+ updated : ' 2026-03-15T23:17:58Z '
55generated_by : claude-opus-4-5-20251101
66workflow_run : 23121188964
77issue : 4576
@@ -10,82 +10,80 @@ library_version: 3.1.0
1010preview_url : https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/pygal/plot.png
1111preview_thumb : https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/pygal/plot_thumb.png
1212preview_html : https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/pygal/plot.html
13- quality_score : 65
13+ quality_score : 68
1414review :
1515 strengths :
16- - Correct equal-area projection math (pole and great circle formulas are accurate)
17- - Clean code structure with good iteration pattern over feature sets
18- - Realistic geological data with appropriate strike/dip values for each feature
19- type
20- - Proper use of pygal allow_interruptions for drawing disconnected great circles
21- - Title and legend formatting correct
16+ - Correct equal-area projection math with proper Schmidt net formulas
17+ - Clean code structure with well-documented projection computations
18+ - Good geological data with three distinct feature types showing realistic orientations
19+ - Proper use of pygal allow_interruptions for disconnected great circle segments
20+ - Dual output (PNG + interactive HTML)
2221 weaknesses :
23- - Great circles extend beyond the primitive circle boundary - must be clipped to
24- the circle
25- - Missing Kamb density contours on pole data (explicitly required by spec)
26- - No N text label at top of stereonet (spec requires North arrow or N label)
27- - No equal-area net grid lines inside the stereonet (spec requires subtle grid)
28- - No degree labels around the perimeter
29- - Red-green color combination is not colorblind-safe
30- image_description : ' The plot shows a stereonet (equal-area/Schmidt net projection)
31- on a white square canvas. A gray primitive circle forms the outer boundary. Small
32- gray cross marks indicate compass directions (N, E, S, W) just outside the circle,
33- with gray tick marks every 10 degrees around the perimeter. Three sets of great
34- circles are drawn: blue arcs for bedding planes (concentrated in the right/NE
35- quadrant), pink/red arcs for fault planes (lower-left area), and green arcs for
36- joint planes (crossing from upper-center to right). Corresponding pole points
37- are plotted as colored dots — blue bedding poles clustered center-right, red fault
38- poles in the lower-left, and green joint poles in the upper-right. The title "stereonet-equal-area
39- · pygal · pyplots.ai" appears at top. A bottom legend shows 6 entries in 3 columns.
40- Notably, many great circles extend well beyond the primitive circle boundary,
41- and there are no compass text labels (N/E/S/W), no Kamb density contours, and
42- no internal equal-area net grid.'
22+ - Missing Kamb density contours (key spec requirement)
23+ - Compass direction labels (N/E/S/W) not rendered as readable text
24+ - Legend naming inconsistency (Faults vs Fault)
25+ - No equal-area net grid lines as spec requires
26+ - Canvas underutilized with too much empty space
27+ image_description : ' The plot shows an equal-area (Schmidt net) stereonet rendered
28+ as a pygal XY chart on a white 3600x3600 canvas. A gray primitive circle forms
29+ the outer boundary with tick marks every 10 degrees around the perimeter. Very
30+ faint compass labels (N, E, S, W) appear at the cardinal positions but are barely
31+ readable due to the light gray color. Three geological feature types are plotted:
32+ Bedding planes (blue great circles and poles), Faults (orange/red great circles
33+ and poles), and Joints (purple great circles and poles). Great circles arc across
34+ the stereonet showing plane orientations, while poles appear as colored dots.
35+ Bedding poles cluster in the SW quadrant (low dip, NE strike), Fault poles cluster
36+ in the center-south area, and Joint poles cluster in the NE-E area (sub-vertical,
37+ N-S strike). A legend at the bottom lists all six series in three columns. The
38+ title reads "stereonet-equal-area · pygal · pyplots.ai" at the top. No density
39+ contours are present.'
4340 criteria_checklist :
4441 visual_quality :
45- score : 18
42+ score : 20
4643 max : 30
4744 items :
4845 - id : VQ-01
4946 name : Text Legibility
5047 score : 5
5148 max : 8
5249 passed : true
53- comment : Font sizes explicitly set (title=56, legend=36), readable but no
54- compass direction text labels
50+ comment : Title and legend explicitly sized and readable, but compass direction
51+ labels are tiny cross marks rather than readable text
5552 - id : VQ-02
5653 name : No Overlap
57- score : 4
54+ score : 5
5855 max : 6
5956 passed : true
60- comment : No text overlap; visual clutter from great circles extending beyond
61- primitive circle
57+ comment : No text overlap; great circle convergence in center is inherent to
58+ stereonets
6259 - id : VQ-03
6360 name : Element Visibility
6461 score : 4
6562 max : 6
6663 passed : true
67- comment : Poles visible at dots_size=12, great circles visible with opacity=0.5
68- but overflow reduces clarity
64+ comment : Pole dots clearly visible; great circle lines somewhat thin at 1.5px
65+ stroke width
6966 - id : VQ-04
7067 name : Color Accessibility
71- score : 2
68+ score : 3
7269 max : 4
73- passed : false
74- comment : Blue/red/green palette has red-green colorblind issues
70+ passed : true
71+ comment : Blue-orange-green palette acceptable but blue-green could be problematic
72+ for some colorblind viewers
7573 - id : VQ-05
7674 name : Layout & Canvas
7775 score : 2
7876 max : 4
79- passed : false
80- comment : Square canvas appropriate but great circles extend beyond primitive
81- circle boundary
77+ passed : true
78+ comment : Stereonet reasonably centered but canvas underutilized with large
79+ empty areas
8280 - id : VQ-06
8381 name : Axis Labels & Title
8482 score : 1
8583 max : 2
8684 passed : true
87- comment : Title correct format; compass directions shown only as tiny crosses,
88- no N/E/S/W text
85+ comment : Title in correct format; compass directions not rendered as readable
86+ text
8987 design_excellence :
9088 score : 9
9189 max : 20
@@ -94,73 +92,78 @@ review:
9492 name : Aesthetic Sophistication
9593 score : 4
9694 max : 8
97- passed : false
98- comment : Custom palette and clean background; looks like well-configured default
95+ passed : true
96+ comment : Custom palette and clean background; looks like a well-configured
97+ default
9998 - id : DE-02
10099 name : Visual Refinement
101- score : 2
100+ score : 3
102101 max : 6
103- passed : false
104- comment : Axes hidden intentionally, but great circle overflow is unpolished
102+ passed : true
103+ comment : Axes hidden, tick marks present, but compass labels and visual weight
104+ could be better balanced
105105 - id : DE-03
106106 name : Data Storytelling
107- score : 3
107+ score : 2
108108 max : 6
109- passed : true
110- comment : Three feature types differentiated by color; planes vs poles distinction
111- provides some hierarchy
109+ passed : false
110+ comment : Three feature types create natural clustering but no density contours
111+ to guide interpretation
112112 spec_compliance :
113- score : 11
113+ score : 10
114114 max : 15
115115 items :
116116 - id : SC-01
117117 name : Plot Type
118118 score : 4
119119 max : 5
120120 passed : true
121- comment : Correct stereonet with equal-area projection; missing internal net
122- grid
121+ comment : Correct equal-area stereonet with great circles and poles; missing
122+ net grid lines
123123 - id : SC-02
124124 name : Required Features
125- score : 1
125+ score : 2
126126 max : 4
127127 passed : false
128- comment : Missing Kamb density contours, N label, net grid, degree labels
128+ comment : Missing Kamb density contours, degree tick labels, and readable N
129+ label
129130 - id : SC-03
130131 name : Data Mapping
131132 score : 3
132133 max : 3
133134 passed : true
134- comment : Strike/dip correctly converted using equal-area projection formula
135+ comment : Strike/dip correctly mapped using Schmidt net equal-area projection
135136 - id : SC-04
136137 name : Title & Legend
137- score : 3
138+ score : 1
138139 max : 3
139- passed : true
140- comment : Title matches format; legend labels descriptive
140+ passed : false
141+ comment : Title correct; legend inconsistent (Faults vs Fault) and six entries
142+ create clutter
141143 data_quality :
142- score : 12
144+ score : 14
143145 max : 15
144146 items :
145147 - id : DQ-01
146148 name : Feature Coverage
147- score : 4
149+ score : 5
148150 max : 6
149151 passed : true
150- comment : Shows great circles and poles for 3 feature types ; missing density
151- contours
152+ comment : Three feature types with distinct orientations ; missing density contour
153+ demonstration
152154 - id : DQ-02
153155 name : Realistic Context
154- score : 4
156+ score : 5
155157 max : 5
156158 passed : true
157- comment : Realistic geological data with appropriate strike/dip ranges
159+ comment : Geological field measurements - realistic, neutral scientific scenario
158160 - id : DQ-03
159161 name : Appropriate Scale
160162 score : 4
161163 max : 4
162164 passed : true
163- comment : 60 measurements total, within spec range; realistic values
165+ comment : Strike and dip values are geologically realistic with appropriate
166+ sample sizes
164167 code_quality :
165168 score : 10
166169 max : 10
@@ -170,7 +173,7 @@ review:
170173 score : 3
171174 max : 3
172175 passed : true
173- comment : Flat script structure
176+ comment : Linear flow with appropriate loop over feature sets
174177 - id : CQ-02
175178 name : Reproducibility
176179 score : 2
@@ -188,13 +191,13 @@ review:
188191 score : 2
189192 max : 2
190193 passed : true
191- comment : Clean iteration pattern, proper math
194+ comment : Well-structured with clear comments explaining projection math
192195 - id : CQ-05
193196 name : Output & API
194197 score : 1
195198 max : 1
196199 passed : true
197- comment : Saves plot.png and plot.html
200+ comment : Saves as plot.png using current pygal API
198201 library_mastery :
199202 score : 5
200203 max : 10
@@ -204,19 +207,20 @@ review:
204207 score : 3
205208 max : 5
206209 passed : true
207- comment : Uses XY chart, allow_interruptions, stroke_style, custom Style
210+ comment : Proper use of pygal. XY with allow_interruptions and Style configuration
208211 - id : LM-02
209212 name : Distinctive Features
210213 score : 2
211214 max : 5
212215 passed : false
213- comment : allow_interruptions and HTML export are somewhat pygal-specific
216+ comment : Uses allow_interruptions and dual output but core visualization is
217+ manual XY math
214218 verdict : REJECTED
215219impl_tags :
216220 dependencies : []
217221 techniques :
218222 - polar-projection
219- - layer-composition
223+ - custom-legend
220224 - html-export
221225 patterns :
222226 - data-generation
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