Menu

Individual skill

evo-geospatial-antimeridian-plates

Load and process PB2002 tectonic plate boundaries and polygons with antimeridian-safe coordinate normalization (0-360 longitude shift) using Shapely 2.0 transform and GeoPandas 1.0 APIs.

tasks-evolved/earthquake-plate-calculation/environment/skills/evo-geospatial-antimeridian-plates/SKILL.md

Read pinned source

Source commit 84ca182da055fafb6453dcec4a6defdbbfd987c1

What was checked

Matches the observed repository HEAD
Yes
Scanner rules are current
No
Repository scan complete
No
Skill scan complete
No
Observed behavior
Not checked yet
Last checked
Nov 6, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings)
97
Repository last updated
Sep 10, 2026
License
Apache-2.0

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files
Read excerpt

# evo-geospatial-antimeridian-plates

Handles loading PB2002 tectonic plate polygon and boundary GeoJSON files, filtering by plate code, and normalizing coordinates across the antimeridian to 0-360 range.

## Key Concepts

### Antimeridian Problem
The Pacific plate spans the 180°/-180° antimeridian. Standard WGS84 coordinates wrap at this boundary, causing catastrophic topological artifacts when projecting. Solution: shift all negative longitudes by +360 to create a continuous 0°-360° space.

### PB2002 Data Model
- **Plates file** (`PB2002_plates.json`): Contains Polygon/MultiPolygon geometries. Pacific plate identified by `Code == 'PA'`.
- **Boundaries file** (`PB2002_boundaries.json`): Contains LineString geometries. Each segment has `PlateA` and `PlateB` properties. Pacific boundaries are where `PlateA == 'PA'` OR `PlateB == 'PA'`.

### Coordinate Handling