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Prof. Dr. Norbert de Lange

Dipl. Geogr. Christian Plass

Institute of Geoinformatics and Remote Sensing

WebGIS with Google Maps

Digital Earth Summit on Geoinformatics:

Tools for Global Change Research

November 14th 2008

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de Lange / Plass: WebGIS with Google Maps

an old tool?GIS

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The New Approach

GMGIS=afree

,easy-to-use,webbase

dGISfor

allwithambitio

usGISfunction

s

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Agenda

1. GIS

2. GIS WEB-GIS

3. GMGIS WEB-GIS with Google Maps

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What is GIS?

GIS stands for "geographic information system.

GIS is a particular form of Information System applied togeographical data.

GIS is a special kind of "information system, to manipulate,summarize, query, edit, visualize - generally, to work withinformation stored in computer databases.

GIS can be seen as a system of hardware, software and procedures

designed to support the input, management, analysis andpresentation of spatially-referenced data for solving complexplanning and management problems.

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GIS functionality

within a browser

is often termed WebGIS

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The Potential of WebGIS

WebGIS will make it possible to make distributed geographicinformation available to a very large worldwide audience

WebGIS will make it possible to add GIS functionality to a widerange of network-based applications in business, government,and education.

Internet users will be able to access GIS applications from their

browsers without purchasing proprietary GIS software

WebGIS means software systems that are platform independent

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WebGIS?

for modern WebGIS architecture it is evident:

client-server-technology

platform independent server-sided data storage and processing power

overall access via internet-browser

no software or licence costs along with increasing use of open source

access to GIS-functions from browsers

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Web-GIS?

two aspects are still being discussed:

free access to digital geodata

extent of available GIS-functions within the browser

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Web-GIS

discussion:

access to digital geodata

general requirementsoverall access

public digital geodata and background maps

for all areas of the world

great or deep spatial resolution

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Web-GIS

discussion:

access to digital geodata

general requirementsoverall access

(free) digital geodata and background maps

for all areas of the world

great or deep spatial resolution

use of Google Maps

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Web-GIS

discussion:

extent of available GIS-functions within the browser

requires:more than simple GIS-functions (e.g. zooming and browsing)

input and editing geodata as well as analysis of geodata

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general: user administration and project managemente.g. user registration,

e.g. definition of a new project, managing existing projects

basic concepts

e.g. public geodata > GoogleMaps

viewing tools

e.g. zooming and panning

presentation tools

e.g. definition of symbols and colours

Prototype: Web-GIS with GoogleMaps

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tools for data input geometry of geoobjects(prototyp: only points)

attributes of geoobjects

tools for managing geoobjects

definition of geoobjects (e.g. type of geometry and type of attributes)

editing data

tools for the analysis of geoobjects

query functions buffering (simple point buffer)

point in buffer

overlay

Prototype: Web-GIS with GoogleMaps

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Prototype: WebGIS with GoogleMaps

33_gis_summit08_04

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