Installation Guide
Relevant source files
The following files were used as context for generating this wiki page:
This guide provides instructions on how to install and integrate the geo-path-reducer module into your JavaScript projects. The module implements the Douglas-Peucker algorithm to simplify curves represented by geographic points (latitude and longitude), which is essential for reducing the complexity of spatial data sets.
Sources: README.md:3-5, src/index.js:3-5
System Requirements
Before installation, ensure your environment meets the following requirements based on the project configuration:
- Node.js Environment: The project uses ES modules (
"type": "module"). - Package Manager:
npm(Node Package Manager) is used for installation and dependency management.
Sources: package.json:10-11, README.md:9-11
Standard Installation
The module is distributed via npm. To install it as a dependency in your project, execute the following command in your terminal:
npm install geo-path-reducer
Sources: README.md:11-13
Project Integration
Once installed, the module can be integrated using standard ES module import syntax. The primary entry point for the library is src/index.js.
Basic Usage Flow
The following diagram illustrates the integration flow from installation to calling the core reduction logic:
Module Configuration
The package.json file defines the following metadata and entry points for the package:
| Field | Value | Description |
|---|---|---|
name | geo-path-reducer | The official package name for npm. |
version | 1.0.0 | Current stable version. |
main | src/index.js | The entry point for the module logic. |
type | module | Specifies the use of ECMAScript modules. |
license | MIT | The licensing terms for use. |
Sources: package.json:2-11
Implementation Components
When the package is installed, it includes several internal modules that handle the mathematical calculations for path reduction.
The diagram shows the internal dependency hierarchy where the main reducer relies on perpendicular distance calculations, which in turn require great-circle distance math.
Sources: src/index.js:1, src/perpendicular-distance.js:1, src/distance.js:1
Data Structures
The library expects a specific data structure for the points array passed to the function:
// Example point structure
{
lat: 37.7749,
lng: -122.4194
}
| Parameter | Type | Description |
|---|---|---|
points | Array<Object> | A list of objects containing lat and lng properties. |
epsilon | Number | The threshold for simplification (in degrees). |
Sources: README.md:20-24, README.md:34-36, src/index.js:3
Testing the Installation
While the project includes a test script definition in package.json, it is currently a placeholder. You can verify the installation by running the example code provided in the usage section.
npm test
Note: The current implementation returns an error message: "Error: no test specified".
Sources: package.json:6-8
Conclusion
Installing geo-path-reducer is a straightforward process via npm. By following this guide, developers can integrate high-performance Douglas-Peucker simplification into their spatial data pipelines, utilizing the recursive logic defined in the core library to optimize geographic paths.