API Reference

DMap3D SDK provides a rich set of API interfaces covering measurement, analysis, drawing, and other functional modules.

Main Modules

Measurement Tools (DMap3D.measurement)

Various measurement capabilities:

• Distance Measurement - Measure distance between two or more points
• Area Measurement - Measure the area of a polygon region
• Height Measurement - Measure height information of a point
• Angle Measurement - Measure the angle formed by three points
• Slope Measurement - Measure terrain slope
• Azimuth Measurement - Measure azimuth angle

Analysis Tools (DMap3D.analysis)

Various spatial analysis capabilities:

• Viewshed Analysis - Analyze the visible range from a point
• Aspect Analysis - Analyze terrain aspect direction
• Contour Analysis - Generate contour lines
• Cut and Fill Analysis - Calculate cut and fill volumes

Drawing Tools (DMap3D.drawing)

Various drawing capabilities:

• Point Drawing - Draw points on the map
• Line Drawing - Draw lines on the map
• Polygon Drawing - Draw polygons on the map

Usage Pattern

All tools follow a unified usage pattern:

import DMap3D from 'dmap3d'
import * as Cesium from 'cesium'

// 1. Create Viewer
const viewer = new Cesium.Viewer('cesiumContainer')

// 2. Create tool instance
const tool = new DMap3D.measurement.area(viewer, options)

// 3. Listen for events
tool.on('measureComplete', (result) => {
  console.log('Measurement result:', result)
})

// 4. Start the tool
tool.start()

// 5. Destroy the tool
tool.destroy()

Type Definitions

DMap3D SDK is written entirely in TypeScript, and all APIs have complete type definitions:

interface ITool {
  start(): void
  stop(): void
  destroy(): void
  on(event: string, callback: Function): void
  off(event: string, callback: Function): void
}

Browser Support

• Chrome >= 90
• Firefox >= 88
• Safari >= 14
• Edge >= 90

Next Steps

• Browse Measurement Tools API
• View Example Code