A Survey of Open Source GIS

1
A Survey of Open Source GIS

• The View from 30,000 Feet orA Mile Wide and
  an Inch Deep
• GEO 465/565 Guest Lecture by
• Rory Plaire
• SharpMap, Corvallis, OR

2
Open Source?

• OpenGIS ! Open source
• Open source is software you can legally modify
  and redistribute
• Buying closed-source software is like buying a
  car with the hood welded shut. Bob Young, Red
  Hat founder
• Open source licenses allow communities of
  practice to grow
• user ? power user ? developer

3
Software Libraries

• DRY Dont Repeat Yourself
• Software Libraries and Code Sharing
• I have a ConvertToUTM(coordlist) function, why
  should you write one?
• .DLL Dynamic Linking Library
• .SO in UNIX, .DYNLIB in OS/X

4
Two Tribes (2004)

• C Tribe
• Mapserver
• GRASS
• Mapguide
• QGIS
• PostGIS
• OGR/GDAL
• PROJ4
• GEOS
• FDO

• Java Tribe
• GeoTools
• GeoServer
• uDig
• DeeGree
• JUMP
• gvSIG
• OpenMap

5
Two MORE Tribes (2007)

• Web Tribe
• CartoWeb
• MapBender
• OpenLayers
• Ka-map
• MapBuilder

• .Net Tribe
• NTS
• Proj.Net
• SharpMap
• WorldWind
• MapWindow

6
C Tribe
TerraLib
PostGIS
GEOS
MapGuide
OSSIM
GRASS
OGR/GDAL
Mapserver
Proj4
QGIS
FDO
GMT
7
C Libraries

• GDAL Geospatial Data Abstraction Library
• Raster Format Reader / Writer
• OGR Open GIS Reference, Simple Features Library
• Vector Format Reader / Writer
• PROJ4
• Coordinate Re-projection
• GEOS
• Geometry Objects and Functions

8
C Servers

• Mapserver
• OpenGIS Web Map Server
• OpenGIS Web Feature Server
• OGR / GDAL / PROJ4
• PostGIS / ArcSDE / OracleSpatial / MySQL
• PostGIS
• OpenGIS Simple Features for SQL
• PROJ4 / GEOS

9
C Servers

• MapGuide Open Source
• C Application Server
• Web Interface Frameworks Included
• Linux and Windows
• OpenGIS WFS WMS
• AJAX Viewer (HTML/JavaScript)
• DWF Viewer (Plugin)
• ArcSDE / Oracle Spatial / ODBC / Shape / SDF /
  PostGIS

10
(No Transcript)
11
C Applications

• QGIS Quantum GIS
• GRASS Geographic Resources Analysis Support
  System
• OSSIM Open Source Software Image Map
• GMT Generic Mapping Tools
• TerraLib

12
QGIS

• C
• Windows / Linux / OS/X
• OGR/GDAL, Proj4, QT
• GRASS Integration

13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
GRASS

• 1980s US Army Corps of Engineers
• Construction Engineering Research Lab (CERL)
• 1991 First internet release
• 1997 Open source development (CERL
  no longer leading)
• 1999 GRASS 5.0, GPL license
• 2007 GRASS 6.2.2

17
GRASS
18
(No Transcript)
19
(No Transcript)
20
OSSIM

• Open Source Software Image Map
• Image processing chains
• Rigorous sensor models
• Terrain correction
• Mosaicing, compositing, fusions
• Histogram matching, tonal balancing
• Grid computing enabled

21
(No Transcript)
22
GMT

• Generic Mapping Tools
• UNIX Philosophy
• Many small tools, chained together
• Gridding, Kriging, Contouring, Plotting
• Surface Models

23
(No Transcript)
24
(No Transcript)
25
Java Tribe
gvSIG
GeoAPI
OpenMap
uDig
GeoTools
GeoServer
JUMP
JTS Topology Suite
DeeGree
26
Java Libraries

• JTS JTS Topology Suite
• OpenGIS geometries and methods
• Intersects, touches, buffer, union
• Polygon building, indexing, validity
• Used by gvSIG, (Open)JUMP, GeoTools
• Ported to .Net (NTS), C (GEOS)
• GeoTools
• Data formats
• General purpose Java GIS toolkit

27
Java Applications

• gvSIG
• GeoServer
• uDig
• DeeGree
• JUMP

28
GeoServer uDig

• Fraternal twins, both built on Geotools

Desktop UI
Web services
uDig
Geoserver
Geotools
Data accessRe-projectionFeatureRender
JTS
Geometry
29
GeoServer

• OpenGIS WFS-T Reference Implementation
• Web Feature Service - Transactional
• OpenGIS WMS, KML, Tiling
• Web Map Service, Keyhole Markup Language
• Data sources
• Shape
• PostGIS
• Oracle
• DB2
• ArcSDE

30
GeoServer

• OpenGIS WFS-T
• Web Feature Server - Transactional
• OpenGIS WMS (Beta)
• Database Datasources Shape

31
uDig

• User-friendly Desktop Internet GIS
• WMS, WFS-T
• Data Sources
• PostGIS, ArcSDE, OracleSpatial
• Shape, GeoTIFF, DWG, DXF
• Editing, re-projection, internet GIS

32
(No Transcript)
33
(No Transcript)
34
(No Transcript)
35
OpenMap

• Oldest Complete Java Toolkit
• Telephone Company Project (BBN)
• Design Application (not Data) Focused

36
OpenMap

• Oldest Complete Java Toolkit
• Telephone Company Project (BBN)
• Design Application (not Data) Focused

37
DeeGree

• Academic Roots
• Bonn University
• JaGo
• Spatial Data Infrastructures (SDI)
• OpenGIS Server Standards Focus
• Web Map Server (WMS)
• Web Feature Server (WFS)
• Style Layer Descriptors (SLD)
• Catalogue Service for the Web (CSW)
• Sensor Observation Service (SOS)
• Web Processing Service (WPS)

38
DeeGree
39
JUMP

• JUMP Unified Mapping Platform
• Specialized original vision
• Support conflation processes
• Spawned a general purpose tool
• Editing, processing, transforming
• Slow core development led to
• OpenJUMP
• Kosmo
• DeeJUMP
• SkyJUMP
• PirolJUMP

40
JUMP / JCS

• Specialized Original Vision (Conflation)
• General Purpose Tool
• Editing, Processing, Transforming

41
(No Transcript)
42
gvSIG

• Province of Valencia, Spain
• Goal to move entire Dept. of Transportation to
  open source
• Development fully funded by government
• Java / Swing
• GPL Gnu Public License

43
gvSIG
44
Another Spanish Civil War?
45
.Net A 3rd Tribe?

• .Net community is young
• Some wrapping of C tribe libraries
• Some cross compilation and porting of Java tribe
  libraries
• JTS becomes NTS (.Net Topology Suite)
• GeoTools becomes GeoTools.net

46
.Net A 3rd Tribe?
MapWindow
Proj4
Proj.Net
WorldWind
NTS
JTS
SharpMap
GDAL
OGR
47
SharpMap

• Mapping library, map rendering, analysis, data
  access
• Uses Proj.Net and NTS
• Reads from OGR/GDAL data sources
• Web services kit

48
SharpMap
49
WorldWind

• NASA internal development project
• All NASA data in a single viewer
• SRTM
• Landsat 7
• MODIS
• Bluemarble
• Open Source, Extendible, Multi-layer

50
(No Transcript)
51
(No Transcript)
52
MapWindow

• Built around core OCX library with API
• Provides UI framework to hold analytical models
• Uses OGR/GDAl/Proj4
• Hosts the EPA BASINS model

53
MapWindow
54
Web Tribe
Ka-Map
CartoWeb
Mapserver
MapBender
WMS
MapBuilder
ArcIMS
TileCache
OpenLayers
PostGIS
FeatureServer
Geoserver
55
OpenLayers

• Tile based, continuous pan, discrete zoom levels
  (ala Google Maps)
• Pure Javascript, no server-side
• Component, very re-usable
• Multiple tile sources
• Microsoft Virtual Earth
• Worldwind
• Yahoo Maps
• Google Maps
• WMS
• TMS Tile Map Service

56
OpenLayers
57
OpenLayers
58
Summary

• Strengths
• Server Side
• Heterogeneous Environments
• Performance
• Standards Support
• Complex or Custom Applications
• Choice! (A Lot!)

• Weaknesses
• Interactive Desktop (?)
• Paper Production
• Lowest Common Denominator
• Standard Applications
• Choice! (Too Much!)

59
Questions?
1 Mile
1 Inch