1. Space and Cyberspace 2017
GIS Data on the Web
Simon Wiles

2. Overview Orientation and general discussion Google’s “My Maps”
Google’s Fusion Tables
KML/KMZ
Other possibilities

3. GIS Data on the Web

4. Map Mashups Map mashups consist of three types of component:
Web-page components (HTML, CSS, Javascript etc.)
Mappable data of many kinds and in many formats
A map interface / base map data

5. Components of a Modern Web Page

6. Kinds of Mappable Data File-types Shape files (ESRI) KML / KMZ
GML (Geography Markup Language)
GeoJSON
Spreadsheet-type data (CSV, Excel, ODS, Google Spreadsheets etc.)
Database/Server Sources
PostGIS, MSSQL Spatial, SpatiaLite
WMS (Web Map Service) – typically serves images [OGC]
WFS (Web Feature Service) – typically serves GML [OGC]
GeoRSS

7. Online Map Interfaces “Public” Services Google Maps Bing Maps Mapbox
MapQuest (AOL) / Apple Maps / HERE
OpenStreetMap **
“Self-hosted” Options
OpenLayers
Leaflet

8. Some Example Mashups weather.com [Mapbox]
UN Environmental Change Hotspots [Google Maps]
Calvin College Tree-Map [Google Maps]
宋高僧傳之校勘與數位化版本 [Google Maps]
USGS Latest Earthquakes (GeoRSS)

9. Working with Google Technologies
Introduction to Google Maps / My Maps
Embedding Google Maps
Working with data
Directly importing CSV, KML
Using Fusion Tables

10. Introduction to Google Maps
Google Maps, Google “My Maps”, and Google Fusion Tables
Log into Google Account
Visit maps.google.com
Check out “My Maps” / “Your Places”
“See All Your Maps” → “Explore”

11. Creating a New Google Map with My Maps
Create a new map
Add places, icons, images
by dropping pins
by searching for a place
by using a lat./long.
Add polygons
Create new layers
Move points between layers
Set the default view

12. Working with data in My Maps
Importing layers
Delimited Text / Spreadsheets
KML
Direct from Google Drive
Styling features
Uniform
Individual
Sequential
By column

13. Google “My Maps” Exercises
Upload taiwanBuddhistTemples.csv
load Collated Fieldwork Data from Google Drive
style points according to team
load a second layer from the same data
style according to Foundation Date

14. Sharing Google “My Maps”
Remember to set Map sharing settings!
Links can be shared, ed, added to web pages etc.
Maps can be embedded in web pages
A short Wordpress interlude
log in and create a new post (check the “Workshop Sandbox” Category)
Copy embed code from Google Maps and paste into new Wordpress post

15. Limitations of Google “My Maps”
Can accept CSV / TSV, XLSX / Google Sheets (Max. 40MiB)
Can accept KML / KMZ (Max. 5MiB)
In either case, there are hard limits:
maximum of 10 layers
maximum of 2,000 features per layer
maximum of 10,000 features in total
maximum of 50 attributes per feature

16. Google Fusion Tables
“Experimental” web application for data analysis and visualization – leads heavily on maps
Limitations
Delimited Text, Spreadsheets (inc. ODS), KML (but not KMZ)
Maximum of 250MiB per table
Maximum of 5,000 columns (< 100 strongly recommended!)
Maximum of 1,000,000 chars. per cell
per-user quota of 1GiB
limit of 350,000 features per map??

17. Introduction to Google Fusion Tables
Fusion tables is about storing, serving and visualizing data, especially in a collaborative way
Connect Fusion Tables to Drive
Search for public tables at:

18. Google Fusion Tables Exercises
Astraptes Fulgerator
load the data to a fusion table
checkout feature map and heat map options
Choropleths
Fuel consumption by US Congressional Districts
Taiwanese Buddhist Temples
World Alcohol Consumption from public data

19. Introduction to KML / KMZ
Keyhole Markup Language
Now an OGC (Open Geospatial Consortium) standard
KMZ is zipped KML
KML as an interchange format
for moving data
for sharing / distributing data
KML is an XML (eXtensible Markup Language) notation

20. KML and XML What does XML look like?
XML is designed to be both machine- and human-readable
schemas and validation can (should) be used to ensure correctness
What does KML look like?
<Placemark/>, <Point/>, <Polygon/>, <ExtendedData/> etc.

21. KML Exercises Save layers from QGIS as KML, and load into My Maps
Download data from My Maps and load into QGIS
Hand-editing KML
clipping Jinshan and Shimen from the TW administrative districts
Prepping data in QGIS and loading it into Google Maps
e.g. selecting temples in Jinshan and Shimen from taiwaneseBuddhistTemples