Download as PDF, PPTX
![Example
{ "type": "Point", "coordinates": [100.0, 0.0] }
{ "type": "Polygon",
"coordinates": [
[
[100.0, 0.0], [101.0, 0.0], [101.0, 1.0],
[100.0, 1.0], [100.0, 0.0]
]
]
}](https://image.slidesharecdn.com/savingmoneywithopensource-101021230221-phpapp02/85/Saving-Money-with-Open-Source-GIS-52-320.jpg)
![EPSG:3435
vs
PROJCS["NAD83 / Illinois East (ftUS)",
GEOGCS["NAD83",
DATUM["North_American_Datum_1983",
SPHEROID["GRS 1980",6378137,298.257222101,
AUTHORITY["EPSG","7019"]],
AUTHORITY["EPSG","6269"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.01745329251994328,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4269"]],
UNIT["US survey foot",0.3048006096012192,
AUTHORITY["EPSG","9003"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",36.66666666666666],
PARAMETER["central_meridian",-88.33333333333333],
PARAMETER["scale_factor",0.999975],
PARAMETER["false_easting",984250.0000000002],
PARAMETER["false_northing",0],
AUTHORITY["EPSG","3435"],
AXIS["X",EAST],
AXIS["Y",NORTH]]](https://image.slidesharecdn.com/savingmoneywithopensource-101021230221-phpapp02/85/Saving-Money-with-Open-Source-GIS-79-320.jpg)
![Example
{ "type": "Point", "coordinates": [100.0, 0.0] }
{ "type": "Polygon",
"coordinates": [
[
[100.0, 0.0], [101.0, 0.0], [101.0, 1.0],
[100.0, 1.0], [100.0, 0.0]
]
]
}](https://image.slidesharecdn.com/savingmoneywithopensource-101021230221-phpapp02/75/Saving-Money-with-Open-Source-GIS-52-2048.jpg)
![EPSG:3435
vs
PROJCS["NAD83 / Illinois East (ftUS)",
GEOGCS["NAD83",
DATUM["North_American_Datum_1983",
SPHEROID["GRS 1980",6378137,298.257222101,
AUTHORITY["EPSG","7019"]],
AUTHORITY["EPSG","6269"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.01745329251994328,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4269"]],
UNIT["US survey foot",0.3048006096012192,
AUTHORITY["EPSG","9003"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",36.66666666666666],
PARAMETER["central_meridian",-88.33333333333333],
PARAMETER["scale_factor",0.999975],
PARAMETER["false_easting",984250.0000000002],
PARAMETER["false_northing",0],
AUTHORITY["EPSG","3435"],
AXIS["X",EAST],
AXIS["Y",NORTH]]](https://image.slidesharecdn.com/savingmoneywithopensource-101021230221-phpapp02/75/Saving-Money-with-Open-Source-GIS-79-2048.jpg)
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Saving Money with Open Source GIS
- 1. Saving Money Using OpenSource Software Bryan Luman bryanluman@gmail.com
- 2. What is OpenSource Software? http://notinventedhe.re/on/2010-10-13
- 3. Wikipedia Says... Open-source software (OSS) is computer software that is available in source code form for which the source code and certain other rights normally reserved for copyright holders are provided under a software license that permits users to study, change, and improve the software.
- 4. What does that mean to me? • FREE! • You can make changes to the software • You can learn from experienced coders • Oh, yeah... FREE!
- 5. Types of Licenses GPL MPL Artistic license LGPL MIT Apache Creative Commons Public Domain BSD CDDL Eclipse
- 6.
- 7. (so don’t sueme) • Check with your lawyer if you are unsure • JUST AS YOU SHOULD WITH ANY DEAL! • Example: RFP’s, Microsoft CAL’s, developer licenses.
- 8. End of ScaryLegal Stuff
- 9. Where do Ifind it?
- 10. How do Iknow if it’s good?
- 11.
- 12.
- 13. How many peoplemaintain it? Not a good choice
- 14.
- 15. Are there companies selling support?
- 16.
- 17.
- 18. OK so whatdo I use?
- 19. Obligatory ESRI Reference Text http://www.python.org/
- 20. Programming Language of Choice http://www.ruby-lang.org def greet puts "Hello world" end
- 21.
- 22.
- 23.
- 24.
- 25.
- 26.
- 27.
- 28.
- 29. GET TO THEGIS SOFTWARE!!!
- 30.
- 31. uDig http://udig.refractions.net/ • Uses Eclipse GUI • Reads most standard GIS formats (PostGIS, shapefile, WMS, WFS, WCS, GeoRSS, KML, and images) • Limited map making ability • Simple editing is OK
- 34. GRASS http://grass.osgeo.org • One of the first GIS systems • Initially developed by US ArmyConstruction Engineering Research Laboratory in Champaign, IL • Incredible powerful for geoprocessing both raster and vector • Gives ArcInfo 7 a run for it’s money on the UI (i.e. not good)
- 37. Quantum GIS http://www.qgis.org/ • Good middle ground • Reasonably decent UI • Power of GRASS • Almost comparable to ArcView • Before you buy another license at least give this a try
- 40.
- 41. PostGIS http://postgis.refractions.net/ • Nearly partof the PostgreSQL core • Based off well documented standards (OGC) • Fast and Stable • Large community developing and documenting
- 42. MySQL Spatial Extensions • Incomplete and not well documented • Not recommended unless you MUST use MySQL
- 43. Spatialite http://www.gaia-gis.it/spatialite/ • Uses much of the same guts as PostGIS • Based on SQLite so very small and portable • Possible exchange format • Can use on iOS devices (GIS on your phone) • A little young
- 44. Most SQL vendorsimplement geography using a version of the: OpenGIS Implementation Specification for Geographic information - Simple feature access http://www.opengeospatial.org/standards/sfs
- 45.
- 46. Most Common • ESRI Shapefile • De facto standard • Documented by ESRI http://www.esri.com/library/whitepapers/pdfs/shapefile.pdf
- 47. Well Known Text(WKT) & Well Known Binary (WKB) • Used in database records • Well documented • Compact
- 48. Example POINT(6 10) = 010100000000000000000018400000000000002440 LINESTRING(34,10 50,20 25) = 01020000000300000000000000000008400000000000001040000000 00000024400000000000004940000000000000344000000000000039 40
- 49. GML http://en.wikipedia.org/wiki/ Geography_Markup_Language • OGC/ISO Standard • Encoded in XML and like XML can be used for good or evil • Most other open formats take their cue from this format
- 50. Example <gml:Point gml:id="p21" srsName="urn:ogc:def:crs:EPSG:6.6:4326"> <gml:coordinates>45.67, 88.56</gml:coordinates> </gml:Point>
- 51. GeoJSON http://geojson.org • JavaScript Object Notation (JSON) encoded • Very similar to GML but a little more streamlined • Different than the ESRI JSON format
- 52. Example { "type": "Point","coordinates": [100.0, 0.0] } { "type": "Polygon", "coordinates": [ [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ] ] }
- 53. GeoRSS http://georss.org • Essentially a streamlined version of GML • Used in RSS feeds • Used by Yahoo in a lot of data streams
- 54. Example <georss:point> 45.256-71.92 </georss:point>
- 55. KML http://code.google.com/apis/kml/documentation •Initially developed for Keyhole (Keyhole Markup Language) which was changed to Google Earth after being acquired • As it’s name implies this is a markup language and is more suited to presenting GIS data than exchanging it • Now an open standard and supported by Google Earth, NASA Worldwind, and ESRI
- 56. Example <?xml version="1.0" encoding="UTF-8"?> <kmlxmlns="http://www.opengis.net/kml/2.2"> <Placemark> <name>Simple placemark</name> <description>Attached to the ground. Intelligently places itself at the height of the underlying terrain.</description> <Point> <coordinates>-122.0822035425683,37.42228990140251,0</coordinates> </Point> </Placemark> </kml>
- 57. GPX http://www.topografix.com/gpx.asp •GPS eXchange Format • XML based • Fairly easy to read and write • Lots of support in consumer GPS devices
- 58. <?xml version="1.0" encoding="UTF-8"standalone="no" ?> <gpx ...> <metadata> <link href="http://www.garmin.com"> <text>Garmin International</text> </link> <time>2009-10-17T22:58:43Z</time> </metadata> <trk> <name>Example GPX Document</name> <trkseg> <trkpt lat="47.644548" lon="-122.326897"> <ele>4.46</ele> <time>2009-10-17T18:37:26Z</time> </trkpt> <trkpt lat="47.644548" lon="-122.326897"> <ele>4.94</ele> <time>2009-10-17T18:37:31Z</time> </trkpt> <trkpt lat="47.644548" lon="-122.326897"> <ele>6.87</ele> <time>2009-10-17T18:37:34Z</time> </trkpt> </trkseg> </trk> </gpx>
- 59. Image Formats (some) BMP MrSID JP2 GeoJPG PNG ERMapper GeoTIFF NITF PCI And many more!!! USGS DEM DOQ ECW NetCDF Erdas Imagine ESRI GRID
- 60. GDAL/OGR http://www.gdal.org/ • Swiss army knife of GIS! • Converts, slices and dices data anyway you like • Really fast! • Used in a bunch of OS and commercial applications • Using ArcGIS? - You are already using GDAL
- 61.
- 62. Openlayers http://openlayers.org/ • Only totally open, full featured, web map viewer • Well documented • Can be used with ESRI ArcGIS Server as well as many other data sources WMS, WFS, GeoRSS, etc...
- 63. MapServer http://mapserver.org/ • Original open source web mapping solution • Akin to ESRI ArcIMS... will lead you into madness with it’s broken HTML • Using just the map rendering capability is OK
- 64. Mapnik http://mapnik.org/ • Beautiful Rendering • Exceptionally difficult to compile • May be a little slow compared to MapServer • Used by Google and Apple
- 65. Tilecache http://tilecache.org/ • Nice small python web service • Will serve tiles ala Google Maps statically or on demand • Lots of options for increasing web serving performance (memcached, HTTP headers)
- 66. GeoDjango http://geodjango.org/ • Django is a python web framework for designing applications quickly • This is a very nice extension that adds a variety of methods for interacting with spatial data using PostGIS, GEOS, and PROJ4
- 67. Free but notopen • Google Earth • Google Maps • Microsoft Bing • Yahoo Maps • Mapquest
- 68.
- 69. Other Cool GeoAPI’s • 4Square • Facebook • Twitter • Flickr
- 70. Open Streetmap http://www.openstreetmap.org/ • Totally open dataset of features • Based on TIGER (in USA) and updated by individuals • Variable precision • Excellent cartography • Made using open source GIS software
- 71. EveryBlock http://everyblock.com • Second evolution of ChicagoCrime.org • Excellent User Interface • Uses Openlayers and Mapnik
- 73.
- 74. libLAS http://liblas.org • Library and executables • Can convert raw LAS to a variety of formats using advanced filtering • Can get detailed info and compare LAS files • Supported by Iowa DNR and US Army
- 75. GEOS http://trac.osgeo.org/geos/ • Geometry Engine, Open Source (GEOS) • Backbone of PostGIS and Spatialite • Also used in Quantum GIS, GRASS, OGR, Ingres, MapServer, and GeoDjango
- 76. PROJ http://trac.osgeo.org/proj/ • Library and executable • Will project to and from anything • Used in almost all OS GIS projects
- 77. A little noteabout projections
- 78. EPSG/WKID Codes http://www.epsg.org/Geoodetic.html •European Petroleum Survey Group (EPSG) initially developed a list of projections for easy reference • Also known as Well Known ID’s (WKID) • A good searchable index is: spatialreference.org
- 79. EPSG:3435 vs PROJCS["NAD83 / Illinois East (ftUS)", GEOGCS["NAD83", DATUM["North_American_Datum_1983", SPHEROID["GRS 1980",6378137,298.257222101, AUTHORITY["EPSG","7019"]], AUTHORITY["EPSG","6269"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.01745329251994328, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4269"]], UNIT["US survey foot",0.3048006096012192, AUTHORITY["EPSG","9003"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",36.66666666666666], PARAMETER["central_meridian",-88.33333333333333], PARAMETER["scale_factor",0.999975], PARAMETER["false_easting",984250.0000000002], PARAMETER["false_northing",0], AUTHORITY["EPSG","3435"], AXIS["X",EAST], AXIS["Y",NORTH]]