#THREE.Geo Geospatial-Mapping

Extensions to three.js for doing simple geospatial mapping.

##Repository Contents

• build - The build script for producing the packaged minified scripts.

• demo/ - A number of example implementations of the Quad Tree Sphere

  • js/ - Scripts used by the demos including the minified version of the THREE.GEO library.
  • globe.html - A simple earth globe with a marker placed over New York state.

• src/ - The main source files for the project.

• build/ - The output directory for the build script.

How To Use

###Example

var map = THREE.ImageUtils.loadTexture('textures/earth.jpg');
map.wrapS = map.wrapT = THREE.RepeatWrapping;
map.anisotropy = 16;

var material = new THREE.MeshLambertMaterial({
    wireframe: false,
    ambient: 0xFFFFFF,
    map: map
});




spatialMap = new THREE.GEO.SpatialMap(
  new THREE.SphereGeometry(6378, 200, 100),
  material
);

spatialMap.setRadius(6378);
spatialMap.setTexturesEdgeLongitude(-183.806168);

scene.add(spatialMap);

var newYorkCoordinates = {
    lat: 40.67,
    lon: -73.9400,
    elevation: 1 // 1 km
};



var geoSymbol = new THREE.GEO.GeoSymbol(
    new THREE.SphereGeometry(100, 20, 10),
    new THREE.MeshBasicMaterial({
        color: 'red'
    }),
    newYorkCoordinates
);

spatialMap.addGeoSymbol(geoSymbol);

Class Structure

THREE.GEO Namespace

This project will use the THREE.GEO namespace for each of it's constituent members.

THREE.GEO.Math

The Math object will contain static helper methods to calculate geo spatial coordinates and projections.

THREE.GEO.SpatialMap

SpatialMap is the entry point for any new mapping instances. It extends THREE.Mesh and provides some basic mapping extensions.

THREE.GEO.GeoSymbol

A GeoSymbol is an object representing a geo spatially positioned representation of an a data point or data set. THREE.GEO.GeoSymbol extends THREE.GEO.SpatialMap and can its self have 1:N GeoSymbols added to it.

##Bulding Project

Build Script Dependencies

Builds depend on uglify-js to perform minification.

sudo npm -g install uglify-js

Build Script

Once you have uglify-js installed simply run the build script.

./build

The build will generate a build directory in which you will find minified library.

• build/
  • three.geo.min.js - The THREE.GEO library.

Build Cleanup

To clean the builds from the working directory run:

./build clean