open source gis applications - australian institute of ... · pdf fileopen source gis...

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www.aig.org.auwww.aig.org.au
Open Source GIS Applications
Clem Hill
Hydrogeologist
GEOAXIOM PTY LTD
www.geoaxiom.com.au
My GIS History
Denison Resources: Mid-Late 80s
DOS on early XT PCs
ACAD and Surfer
Qld Govt: til mid 90s
DOS, early Windows, SUN Solaris
MapInfo (DOS/Win); Surfer; GRASS; ArcInfo
Corporate Consulting and Now
MapInfo; QGIS; Surfer; Google Earth; OziExplorer

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GIS and You
Should be on every Geoscientists desktop
Part of your daily tool kit
Cost sensitivity for smaller companies and
individuals
Consider:
support
data sources
compatibility and connectivity
What is Open Source
Source code is licenced under the GNU or
GPL (General Public Licence)
the license allows modification, and re-
distribution of the software and source code
requires derived code to be available under the
same or a comparable licence
source code can be used across applications
and operating systems
Free Open Source Software (FOSS)

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Open Source GIS Software
FlowMap
FlowMap is a freeware application designed to
analyse and display flow data.
Eg. Transport; hydrological model results
Developed at the Faculty of Geographical
Sciences of the Utrecht University in the
Netherlands.
Platforms: Windows OS
http://flowmap.geo.uu.nl
GRASS
Geographic Resources Analysis Support System
Originally developed by the US Government.
GRASS is probably the most well-known open
source and original GIS software application.
Strong image processing and spatial modelling
system.
Platforms: Windows OS, Linux, Macintosh, Sun
Solaris, Silicon Graphics Irix, HP-UX, and DEC-Alpha
http://grass.osgeo.org

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Quantum GIS (QGIS)
Development began 02, Ver 1.0 released 09
Interface with Enterprise Databases Oracle,
PostgreSQL/PostGIS, SpatiaLite, MySQL.
integration with PostGIS, GRASS, MapServer
Wrapper Uses libraries from other systems
Platforms: Windows OS, Linux, Unix, Mac OSX
http://qgis.org
SAGA - System for Automated Geoscientific Analyses
Development from 90s at Dept. Physical
Geography, Gttingen & Hamburg Universities
Strength is DEMs to predict soil properties, terrain
controlled process dynamics, climate parameters
Some code/libraries used in QGIS
Platforms: Windows OS, Linux, Unix, Mac OSX
http://www.saga-gis.org

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DEM Data
Basalt Plateau Cape YorkDEM from Lidar data
DEM from Lidar DataShaded with overlayed contours

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DEM from Lidar DataLocation of drill holes with surface induration
Five Reasons to Start Using
QGIS
1. QGIS is Free
Free and Open Source Software
2. QGIS is Cross Platform
Win; Mac (OSX + iPad); Linux; Android
3. The Use of Open Source GIS is Growing

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QGIS
QGIS
Geographic Information System (GIS) Tutorial -Using QGIS by umaryusuf

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QGIS
4. Plenty of QGIS Support and Tutorials
Eg: TheCMSSchool & The GIS Tutorhttps://www.youtube.com/TheCMSSchool/ videos
http://www.gistutor.com/quantum-gis.html
5. Connectivity and Compatibility wide variety of file formats (MapInfo; ESRI Shape; DXF)
database servers (PostGIS, Oracle Spatial & MS SQL)
OGC standards compliant services (WMS, WFS & WPS)
designed to be modular
Comparisons

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Importing Point Data - ArcMap
Open ArcMap
Set the coordinate system to WGS 1984
Load the txt file.
It will only be viewable in the Table of Contents
under the List By Source icon.
Right click on the txt file and select Display
XY Data
Open ArcCatalog, either as a separate
window or within ArcMap, and navigate to
where the txt file is stored.

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In the Display XY Data window, set the X
Field to be Long_WGS84 and the Y Field to
be Lat_WGS84.
Leave the Z Field blank.
Make sure your coordinate system is
GCS_WGS_1984.

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A window will pop-up Table Does Not Have
Object-ID Field. This is basically saying that the
data is not a shapefile and hence does not have an
Object-ID field.
Export the data to a shapefile or feature class
right click on the layer (TC_Ita_082100x.txt Events)
Data Export Data.
Load in a base map from ArcGIS Online and
symbolize the points.

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Importing Point Data - QGIS
Note the fields in the table are
labelled with the co-ord system

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Points plotted on Google composite base map
Points to line- QGIS

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Working With Polygons - QGIS
Google composite base map
Google base map with 100k Geology polygons

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Google base map with WA soils polygons
Google base map with shaded composite polygons
indicating presence of rock

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QGIS and the Web
Direct integration of a WMS and WFS server
Layers styles and settings are automatically
recognized by QGIS Server
Cloud-hosted option (QGIS Cloud) for online
publishing and viewing.
QGIS for Android
Operates on mobile phones and tablets.
Optimised for radically different user interaction
and smaller screen sizes.
Designed with field data collection in mind.
Supports both internal and external GPS devices.

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Other Options worth considering
Manifold ( $300)
Compact and well supported GIS
Can be used for field data entry
http://www.manifold.net
OziExplorer ( $40-130)
GPS Mapping Software
Magellan, Garmin, Brunton/Silva and others
Upload/download waypoints, routes & tracks
Real time tracking of GPS position
http://www.oziexplorer.com
Thank you

open source gis applications - australian institute of ... · pdf fileopen source gis...

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