Geospatial Web Technologies Overview

Geospatial Web Dr. Harry Chen CMSC 491S/691S March 24, 2008

Agenda ,[object Object],[object Object],[object Object]

Our civilizations are built on maps Anglo-Saxon world map (circa 1040 CE) 1883 reconstruction of Eratosthenes ' map (276-194 BC) Babylonian World map (6 th Century BC) Tabula Peutingeriana (4th century) - Britain to the west, India to the East Source: http://en.wikipedia.org/wiki/Ancient_world_maps

Map is more than a piece of paper ,[object Object],[object Object],[object Object],[object Object],[object Object]

World Map 1970 Source: National Geographic Ukraine is part of the USSR

World Map 1994 Source: National Geographic Ukrain is no longer part of the USSR

Digital Maps Picture a digital map in your head. What do you see?

Do you see this? Fine. Google Maps is the most popular digital map today. But, there are many other kinds of digital maps before it. Without their innovations, we won’t have Google Maps.

Disclaimer ,[object Object],[object Object],[object Object],[object Object]

Key concepts ,[object Object],[object Object]

GIS (Geographic Information Systems) ,[object Object],[object Object],[object Object],[object Object]

Geospatial Web ,[object Object],[object Object],[object Object]

Emergence of GIS ,[object Object],[object Object],[object Object],[object Object],[object Object]

Popular use of GIS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Technologies under the hood ,[object Object],[object Object],[object Object],[object Object],[object Object]

Data entry ,[object Object],[object Object],[object Object],How would you store the information about the country border of Ukraine?

How about the border of Indonesia? So many islands! Irregular shapes!

How about other kinds of data? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Some common representations ,[object Object],The concept of layers (ESRI)

What can say about your data? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What else can you say about data? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Key Geospatial Web technologies

Geospatial Web technologies ,[object Object],[object Object],[object Object],[object Object]

GML ,[object Object],[object Object]

Describing a Feature using GML http://en.wikipedia.org/wiki/Geography_Markup_Language#Examples

KML ,[object Object],[object Object],[object Object],[object Object]

KML example ,[object Object],[object Object],[object Object]

Web Map Service (WMS) ,[object Object],[object Object],WMS Geo. Web Application Client Browser Map (JPEG, GIF etc.)

Web Feature Service (WFS) ,[object Object],[object Object],WFS Geo. Web Application Client Browser Feature (GML/XML or ESRI shapefiles)

Geotag ,[object Object],[object Object],[object Object],[object Object],[object Object]

Visualizing the geospatial Web ,[object Object]

What’s next? ,[object Object],[object Object],[object Object],[object Object]

Geospatial Web Technologies Overview

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