---
warning: DO NOT CHANGE THIS MANUALLY, THIS IS GENERATED BY https://github.com/duckdb/community-extensions repository, check README there
title: eviltransform
excerpt: |
  DuckDB Community Extensions
  WGS84, GCJ02 and BD09 coordinate transformations and exact Jenks natural breaks

extension:
  name: eviltransform
  description: WGS84, GCJ02 and BD09 coordinate transformations and exact Jenks natural breaks
  version: '0.1'
  language: C++
  build: CMake
  license: MIT
  requires_toolchains: python3
  excluded_platforms: 'wasm_mvp;wasm_eh;wasm_threads'
  maintainers:
    - DeoLeung

repo:
  github: aiyou178/duck_eviltransform
  ref: c77375d511e17f8bb9b0df46d610af912d367afa

docs:
  hello_world: |
    INSTALL spatial;
    LOAD spatial;
    LOAD eviltransform;
    SELECT ST_AsText(ST_EvilTransform(ST_Point(120, 30), 'WGS84', 'GCJ02'));
    SELECT ST_JenksBins([1, 2, 3, 10, 11, 12], 2);
  extended_description: |
    Port of [pg_eviltransform](https://github.com/aiyou178/pg_eviltransform) to DuckDB.
    Adds WGS84 / GCJ02 / BD09 transformations for points, lines, polygons,
    multi-geometries and nested collections. Z/M ordinates are preserved by the
    custom coordinate formulas. Standard projections, including geographic
    CGCS2000 (EPSG:4490), delegate to the spatial extension.

    Install and load `spatial` before loading `eviltransform`. The explicit
    three-argument interface is `ST_EvilTransform(geometry, from_crs, to_crs)`;
    coordinates use longitude/easting as X and latitude/northing as Y.
    Custom CRS metadata is not attached to the output. The original approximate
    GCJ02 inverse and rectangular China guard are retained.

    `ST_JenksBins(values, breaks[, invert])` computes exact weighted Jenks
    natural breaks from a list. `ST_JenksBinsAgg(value, breaks[, invert])` is
    the streaming aggregate and supports parallel combine.

    Uses the stable C extension ABI v1.2.0. Loading creates/replaces the
    `ST_EvilTransform` macro in the database's main schema, so initialization
    requires a writable database. WebAssembly is excluded from this release.
    See the [README](https://github.com/aiyou178/duck_eviltransform#readme) for
    aliases, NULL handling, accuracy and installation details.

extension_star_count: 3
extension_star_count_pretty: 3
extension_download_count: 542
extension_download_count_pretty: 542
image: '/images/community_extensions/social_preview/preview_community_extension_eviltransform.png'
layout: community_extension_doc
---
### Compatibility Matrix

This table covers all DuckDB releases that have not reached [end-of-life](https://duckdb.org/release_calendar), including LTS releases, and shows the 2 most recent patch releases of each. Older patch releases are not listed, but the extension may be available for them as well.

<div class="extension_compatibility_table"></div>

| Platform | 1.4.4 | 1.4.5 | 1.5.5 | 1.5.6 | 2.0.0 |
| :--- | :---: | :---: | :---: | :---: | :---: |
| Linux AMD64 | ❌ | ❌ | ❌ | ❌ | ✅ |
| Linux ARM64 | ❌ | ❌ | ❌ | ❌ | ✅ |
| macOS AMD64 | ❌ | ❌ | ❌ | ❌ | ❌ |
| macOS ARM64 | ❌ | ❌ | ❌ | ❌ | ✅ |
| Windows AMD64 | ❌ | ❌ | ❌ | ❌ | ✅ |
| Windows ARM64 | ❌ | ❌ | ❌ | ❌ | ❌ |
| WebAssembly | ❌ | ❌ | ❌ | ❌ | ❌ |

### Installing and Loading
```sql
INSTALL {{ page.extension.name }} FROM community;
LOAD {{ page.extension.name }};
```

{% if page.docs.hello_world %}
### Example
```sql
{{ page.docs.hello_world }}```
{% endif %}

{% if page.docs.extended_description %}
### About {{ page.extension.name }}
{{ page.docs.extended_description }}
{% endif %}
### Added Functions

<div class="extension_functions_table"></div>

This extension does not add any functions.

### Overloaded Functions

<div class="extension_functions_table"></div>

This extension does not add any function overloads.

### Added Types

<div class="extension_types_table"></div>

This extension does not add any types.

### Added Settings

<div class="extension_settings_table"></div>

This extension does not add any settings.