The document discusses visualizing geospatial data using CartoDB and D3.js. CartoDB is a cloud-based platform for web mapping and working with geospatial data formats. It can be used to create standalone web maps or as a tile/data server. CartoDB uses PostgreSQL with PostGIS extension. D3.js is an open-source JavaScript library for rendering dynamic graphics in the browser using SVG. Examples of integrating CartoDB and D3.js are provided. The document also provides an example of JSON data returned from CartoDB queries.

1. Visualizing geoSpatial data using
CartoDB and D3.js
Josh Gage
Gage Cartographics

2. CartoDB
Cloud computing platform for GIS and webmapping in the browser
Support most geoSpatial data formats

3. CartoDB
Stand alone web maps
Tile/data server for custom applications

4. CartoDB
• PostgreSQL Database with full POSTGIS
capability

5. D3 – Data Driven Documents
• Open Source JavaScript library
• Renders dynamic graphics in browser’s DOM
using <svg>

6. Jumping-in - CartoDB
http://gagecarto.cartodb.com/
http://www.gagecartographics.com/test/base.html
http://gagecartographics.com/test/sliderAndDays.html
http://www.gagecartographics.com/test/crimes.html

7. JSON returned from Queries
{
"type": "Feature",
"properties": {
"typesimple": "theft",
"type": "THEFT OF LOST OR MISLAID PROPERTY ",
"id": "891",
"location": "100 BLK E MAIN ST",
"location2": "100 E MAIN ST, Bozeman Montana",
"date": "2013-07-13T00:59:59+0200",
"cartodb_id": 891,
"created_at": "2013-10-26T16:53:50+0200",
"updated_at": "2013-10-26T17:07:58+0200",
"cartodb_georef_status": true,
"time": null
},
{
"type": "Feature",
"properties": {
"typesimple": "theft",
"type": "THEFT, ALL OTHERS ",
"id": "926",
"location": "1200 BLK W LINCOLN ST",
"location2": "1200 W LINCOLN ST, Bozeman Montana",
"date": "2013-08-03T20:17:59+0200",
"cartodb_id": 926,
"created_at": "2013-10-26T16:53:50+0200",
"updated_at": "2013-10-26T17:08:28+0200",
"cartodb_georef_status": true,
"time": null
},