GIS with Google Earth
and Google Maps

Josh Livni & Mano Marks
Guest Speaker: Brian Flood
Feedback: http://j.mp/gis-geo
#io2011, #GIS

Google Geo APIs Landscape

Google Maps API on over 600K websites
Over 800 Million downloads of Google Earth
Over 1 Billion KML files on the web
Google Maps API most used mashup platform in the world

Source: Google

Google
Geo

  Geographic
  Information
  Systems

Agenda

Introduction
GIS and Google Products

Google Earth
Google Maps API
Google Fusion Tables
Google Earth Builder
Google Earth Engine

Integration Examples

GDAL/OGR
ShpEscape
Arc2Earth

Data Visualization
Convert GIS Data Formats
Data Hosting

Google Earth and Earth API

Earth / Earth API Demo

Portable Globe

Projections
Geometry Library

Google Maps API

Google Maps API: Great Circle Demo Code

<script type="text/javascript"
src="http://maps.google.com/maps/api/js?sensor=false
&libraries=geometry">
...
  var geodesicOptions = {
      strokeColor: '#CC0099',
      strokeOpacity: 1.0,
      strokeWeight: 3,
      geodesic: true
    }
  geodesic = new google.maps.Polyline(geodesicOptions);
  geodesic.setMap(map);

Google Maps API: Projection Demo Code

  GallPetersProjection.prototype.fromPointToLatLng = function(point) {
    var y = point.y;
    var x = point.x;
    if (y > 0) {
      y = 0;
    }
    if (y >= GALL_PETERS_RANGE_Y) {
      y = GALL_PETERS_RANGE_Y;
    }
    var origin = this.worldOrigin_;
    var lng = (x - origin.x) / this.worldCoordinatePerLonDegree_;
    var latRadians = Math.asin((origin.y - y) / this.worldCoordinateLatRange);
    var lat = radiansToDegrees(latRadians);
    return new google.maps.LatLng(lat, lng);
  };

Geometry Library Major Features

google.maps.geometry.encoding (for polylines)

encodePath
decodePath

google.maps.geometry.spherical

computeArea
computeDistanceBetween
computeHeading
computeLength
computeOffset
interpolate

Projection Major Features

google.maps.Projection

fromLatLngToPoint
fromPointToLatLng

Data Visualization
Spatial Queries
Data Management

Google Fusion Tables

Google Fusion Tables - SQL API

table

SELECT name FROM 790805 LIMIT 5;

name,address
FIRST CUP,"2911 VAN NESS AVE , 94109"
UNION STREET COFFEE ROASTERY,"2191 UNION ST , 94123"
NAPOLI PIZZA RESTAURANT,"1045 POLK ST , 94109"
WAYO,"1407 VAN NESS AVE , 94109"
MIFUNE RESTAURANT,"1737 POST ST , 94115"

demo

Google Fusion Tables - Nearest Neighbor

 SELECT * FROM 790805
 ORDER BY ST_Distance(
   address, LatLng(37.7832, -122.4035))
 LIMIT 5;

demo

Google Fusion Tables - Nearest Neighbor

Google Fusion Tables - Intersections

 SELECT name,address FROM 790805
 WHERE ST_Intersects(
 address, CIRCLE(LATLNG(37.2, -122.3), 100));

demo

Google Fusion Tables - Intersections

 SELECT name,address FROM 790805
 WHERE ST_Intersects(
 address, CIRCLE(LATLNG(37.2, -122.3), 100));

demo

 SELECT count(), description FROM 790805
 WHERE ST_Intersects(
 address, CIRCLE(LATLNG(37.2, -122.3), 100))
 GROUP BY description;

demo

Google Earth Builder

Manage map data
Build and Publish maps

Google Earth Builder

Manage all your map data in Google's cloud

Upload your data
- add metadata, attribution, and tags
Easy to view and share
- robust ACL's, search, and previews
Create and publish maps
- styling & labels; Maps, Earth & Android

Google Earth Engine

Image Analysis
..on large datasets

Google Earth Engine

Just-in-time computation of scientific map products

In their native projection
Using arbitrary algorithms.

On a lot of data

Every Landsat scene (currently 50% of archive)
Daily MODIS updates (including archive since 2005)

http://earthengine.googlelabs.com/

Agenda

Introduction
GIS and Google Products

Google Earth
Google Maps API
Google Fusion Tables
Google Earth Builder
Google Earth Engine

Integration Examples

GDAL/OGR
ShpEscape
Arc2Earth

GIS Data formats
Data Conversion

Integration Examples

GDAL/OGR

Utility libraries for

Parsing data
Data conversion
Reprojection
Tiling

Software bridge between ArcGIS and Google Geo Services

KML Exports and Imports
Map Tile Cache creation
Google Maps viewable inside ArcGIS
Fusion Tables Upload
Planned support for Google Earth Builder

Complex GIS Data and Symbology to KML

Map Tile Caches - Anything you can display in ArcMap

Data Services - Google Maps in ArcGIS

ArcGIS Symbols to Fusion Tables Style JSON

Making Fusion Tables Compatible with ArcGIS

With Fusion Tables you get:
- Scalability
- Zero Configuration
- Zero Maintenance
- Google Expertise
Use Fusion Tables visualizations but allow other GIS systems to integrate
Open Spec - GeoServices REST Specification
- Support for ArcGIS.com, ArcGIS Explorer and Mobile Apps

Some of the technology stacks used

	Google Maps Premier
	Google AppEngine
	Google Fusion Tables
	ArcGIS
	Arc2Cloud

Arc2Cloud - Additional geospatial functionality for Fusion Tables

Arc2Cloud - Each feature has an endpoint and multiple formats.

Demo - Import ArcGIS Map Schema into Fusion Tables

Demo

Task Queue Geoprocessing

Basic full layer geoprocessing without desktop software
MapReduce-like processing using AppEngine Task Queue
Buffer, Merge, Join, Clip, Snap etc
Use JTS (Java Topology Suite) on AppEngine to perform spatial operations

Demo - Spatial Join between two Fusion Tables

Demo

Task Queue Geoprocessing - Pros/Cons

Distributed dataset analysis is more attractive then snapshots sent to GP server
Analysis results are immediately available as a Fusion Table
Tasks are idempotent, small errors will be re-queued

Lots of bandwidth consumed
Oversampling of data in grid strategy (although FeatureCache access helps)
Tried and true algorithms need to be tweaked/changed

Thank you!

www.arc2earth.com
@bFlood on twitter
videos of demos: screenr.com/user/bFlood

Questions and Answers