Wikipedia

ILWIS

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ILWIS (Integrated Land and Water Information System) integrates image, vector and thematic data in one unique and powerful package on the desktop. ILWIS delivers a wide range of features including import/export, digitizing, editing, analysis and display of data as well as production of quality maps. ILWIS was intially developed and distributed by ITC Enschede (International Institute for Geo-Information Science and Earth Observation) in the Netherlands as shareware, but is now freely available as open source software through the 52°North initiative under the GNU General Public License.[1][2] The current version is ILWIS 3.4 Open.

ILWIS
Developer(s)52° North
Stable release
3.4 Open / July, 2007
Repository
Operating systemMS-Windows
TypeGeographic information system
LicenseGPL
Website52°North Product page

Though lagging behind other commercial GIS / Remote sensing software in a number of functionalities, ILWIS is expected to improve as open source software. Similar to the GRASS GIS in many respects, ILWIS is however presently available natively only on Microsoft Windows.

History

In late 1984, ITC was awarded a grant from the Dutch Ministry of Foreign Affairs, which led to the development of a Geographic Information System (GIS) which could be used as a tool for land use planning and watershed management studies. By the end of 1988 the DOS version 1.0 of the Integrated Land and Water Information System (ILWIS) was released. Two years later, ILWIS was made commercial with ITC establishing a worldwide distributors network. ILWIS 2.0 for Windows was released at the end of 1996, and ILWIS 3.0 by mid 2001. On 1st January 2004, ILWIS 3.2 was released as a shareware (one month trial offer). From July 1st 2007, ILWIS 3.4 Open is being be distributed as an open source software under GPL license.[3]

Roadmap

ILWIS building currently relies on the Microsoft Visual 6 compile environment which will be switched over to the GCC compiler. After successful completion of the migration to GCC, the plan is to break down ILWIS Open into individual components. To reuse and deploy ILWIS’ GIS and image processing functionality also in spatial data infrastructures (SDI), its functions will be offered in an open framework as distributed services, in two ways:

  1. As java service proxies accessible to programmers and
  2. As OGC - based services accessible to client applications.

The framework supports the search and access of services through a service registry and can be used together with client tools like uDig.[3]

Features

  • Integrated raster and vector design[4]
  • On-screen and tablet digitizing
  • Comprehensive set of image processing tools
  • Orthophoto, image georeferencing, transformation and mosaicing
  • Advanced modeling and spatial data analysis
  • 3D visualization[5] with interactive editing for optimal view findings
  • Rich projection and coordinate system library
  • Geo-statistical analyses, with Kriging for improved interpolation[6]
  • Modest system requirements
    • Pentium with 64 MB RAM
    • Operating systems: Windows 98, Me, NT, 2000, XP
  • Extended import/export capabilities
    • Conversions though PCI's GeoGateway supporting more than 80 map and table formats
    • Import and export using the GDAL library
  • Advanced data management
    • Multiple Catalogs in the Main window
    • Select, copy and delete multiple objects
    • Sorting and details view of objects
    • Object collection: container for related objects
  • Modern user-interface
    • Operation-list in Main window as a tree view
    • Layer Management pane with a tree view in a map window, including legend(s)
    • Dockable windows
    • Tabbed property sheets
  • Layouts for better output
    • WYSIWYG Layout editor to position annotation and multiple map views on scale
  • Advanced Data Storage
    • Higher accuracy for vector data
    • Unlimited number of points, segments and polygons
    • Raster map size unlimited
  • Wizards
    • Setup digitizer wizard
    • Import table wizard
    • Join column wizard
  • Advanced Help
    • HTML-Help giving a nicer interface
    • Better Contents, Index and Search capabilities
    • Favorites tab to store frequently used Help topics
  • Stereoscopy tools - To create a stereo pair from two aerial photographs
  • Transparency to display raster and polygon maps
  • Overview window in map window
  • Pyramid layers for fast display of large raster maps
  • Calculating with map lists
    • Aggregate map
    • Filter
    • Stretch
    • Resample
    • Densify raster map
    • Sub-map of raster map
    • Mirror/Rotate
  • Classify using Prior probability
  • ADO/ODBC to access databases
  • Spatial Multiple Criteria Evaluation (SMCE)
  • Hydrologic Flow Operations
    • The Fill sinks operations removes local depressions from a Digital Elevation Model.
    • The DEM optimization operation to 'burn' existing drainage features into a Digital Elevation Model.
    • The Flow direction operation determines into which neighbouring pixel any water in a central pixel will flow.
    • The Flow accumulation operation determines the number of pixels that naturally drain into outlet pixels; the operation can be used to find the drainage pattern of a terrain.
  • Find Datum Parameters Wizard
  • GARtrip import - Map Import allows the import of GARtrip Text files with GPS data.
  • Spatial Multiple Criteria Evaluation (SMCE)
    • Overlay of reference maps on the input/output maps of the application;
    • It is possible to use non-spatial criteria, allowing the combination of spatial and non-spatial MCE;
    • The standardization of value criteria is assisted by interactive function graphs.
  • DEM operations[7]
    • Topological Optimization, to improve the results when the input has undefined values;
    • Variable Threshold Computation, to help preparing a threshold map for drainage network extraction;
    • Drainage Network Extraction, to extract a basic drainage network;
    • Drainage Network Ordering, to assign a unique identifier to each stream;
    • Catchment Extraction, to construct catchments for all unique streams;
    • Catchment Merge, to merge adjacent catchments;
    • Overland Flow Length, to calculate the overland distance towards the 'nearest' drainage for each pixel according to the flow direction map;
    • Compound Index Calculation, to calculate a number of maps relevant to watershed management, soil erosion and conservation studies;
    • Horton Statistics, to calculate the number of streams, the average stream length, the average area of catchments for Strahler stream orders;
    • Aggregate Statistics, to calculate statistics after crossing a merged catchments map with a DEM;
    • Cumulative Hypsometric Curve, to obtain cumulative area values for all height values in a single catchment;
    • Class Coverage Statistics, to obtain areas in percentages of a class map within a single catchment.
  • Georeference editors
    • Support for sub-pixel precision in tiepoint editors;
    • Support up to 8 fiducial marks for the inner orientation of orthophotos;
    • Support for affine and projective inner orientation;
    • Support for 3D coordinate transformations using 7 or 10 datum parameters.
  • Satellite projections
    • MapList Statistics: calculates average, median, minimum, maximum and standard deviation for a map list;
    • MapList Graph: given a location, a Z-plot is created of a map list
    • MapList Calculate: performs any calculation on map lists with the same number of maps

ILWIS Applications

Applications in Earth Sciences

Applied geomorphology and Natural hazards

Engineering geology

Surface hydrology

Hydro geology

Geology

  • Remote sensing and GIS techniques applied to geological survey
  • Geological data integration

Applications in Environmental Management

Neighborhood modelling

  • Modelling with neighbourhood operators
  • Extracting topographic and terrain variables for distributed models

Data combination

  • Tools for map analysis applied to the selection of a waste disposal site

Soil pollution management

  • Environmental chemistry of contaminated soils[15]

Land Resource and Urban Surveys

Urban surveys

  • Updating a land use map with oblique air photos
  • Analysis of urban change and spatial pattern
  • Analysis of suitability for urban expansion

Land use planning

  • Analysing the fuelwood demand
  • Vegetation cover studies[16]
  • Land resource management[17]
  • Regional economic planning[18]

Soil surveys

Global radiation studies

  • Solar radiation mapping[22]

Application in Cartography

See Also

References

  1. ^ "ITC's GIS software ILWIS migrates to open source". 2007-01-30. Retrieved 2007-06-26. {{cite web}}: Check date values in: |date= (help)
  2. ^ "ILWIS 3.4 Open". 52°North. 2007-036-27. Retrieved 2007-07-01. {{cite web}}: Check date values in: |date= (help)
  3. ^ a b "FOSS4G 2007 : ILWIS and 52°North: From closed source to open source and interoperable image services". Retrieved 2007-07-02.
  4. ^ Koolhov, Wim,Jelle Wind (1996). "Domains in ILWIS: system knowledge about meaning of data;". Proceedings of the second joint European conference & exhibition on Geographical information, Barcelona, Spain. I. IOS Press: 77–80. ISBN 90-5199-268-8.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ^ A Partovi (2003). Suitability Study Of ASTER Data Geometry To Digitize Contour Lines In ILWIS (PDF). Master degree thesis.
  6. ^ J Hendrikse (2000). "GEOSTATISTICS IN ILWIS". INTERNATIONAL ARCHIVES OF PHOTOGRAMMETRY AND REMOTE SENSING. INTERNATIONAL SOCIETY FOR PHOTOGRAMMETRY AND REMOTE SENSING.
  7. ^ Nag, S. K. (2000). "DIGITAL ELEVATION MODELING USING ILWIS 2.1 IN PARTS OF PURULIA DISTRICT, WEST BENGAL. INDIA". INTERNATIONAL ARCHIVES OF PHOTOGRAMMETRY AND REMOTE SENSING. 33 (B$/2). INTERNATIONAL SOCIETY FOR PHOTOGRAMMETRY AND REMOTE SENSING: 726–733. ISSN 0256-1840.
  8. ^ E.J.M. Carranza and O.T. Castro (2003). "PREDICTIVE MAPPING OF LAHAR-INUNDATION HAZARD ZONES: EXAMPLE FROM WEST PINATUBO AREA, PHILIPPINES" (PDF). 2003 Annual Conference of Internationl Association of Mathematical Geology. Internationl Association of Mathematical Geology.
  9. ^ SK Jain, RD Singh, SM Seth (2000). "Design Flood Estimation Using GIS Supported GIUHApproach" (PDF). Water Resources Management. Springer.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  10. ^ BOCCO, GERARDO; VALENZUELA, CARLOSR (1988). "Integration of GIS and image processing in soil erosion studies using ILWIS (Integrated Land and Watershed Management Information System)". ITC Journal (no. 4): pp. 309-319. {{cite journal}}: |issue= has extra text (help); |pages= has extra text (help); line feed character in |title= at position 76 (help)CS1 maint: multiple names: authors list (link)
  11. ^ F Wang, Z Vekerdy, JL van Genderen. "DATABASE MANAGEMENT AND IMPLEMENTATION FOR COAL FIRE DETECTION AND MONITORING IN THE RUJIGOU COALFIELD, NORTHWEST CHINA" (PDF). Retrieved 2000-06-10. {{cite web}}: Check date values in: |accessdate= (help)CS1 maint: multiple names: authors list (link)
  12. ^ S KARANJIT. "REMOTE SENSING AND GIS IN WATERSHED AREA MANAGEMENT" (PDF). Gis Development.
  13. ^ UTSET Angel; LOPEZ Gilberto; Dolman A.J.; Hall A.J.; Kavvas M.L.; Oki T.; Pomeroy J.W. (2001). "Regional mechanistic estimations of sugar-cane water use". IAHS-AISH publication (270). International Association of Hydrological Sciences: 35–40. ISBN 1-901502-61-9.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  14. ^ Aubazhagan, S. Aschenbrenner, F. Knoblich, K. (1999). "Geographic information system for artificial recharge study in Germany". Geoscience and Remote Sensing Symposium, 1999, IGARSS '99 Proceedings. 5. IEEE 1999 International: 2380–2382. ISSN 0-7803-5207-6. {{cite journal}}: Check |issn= value (help)CS1 maint: multiple names: authors list (link)
  15. ^ GEORGES EKOSSE1; PAUL S. FOUCHE (2005). "Using GIS to understand the environmental chemistry of manganese contaminated soils, Kgwakgwe area, Botswana". Journal of Applied Sciences and Environmental Management. 9 (2). World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt: 37–42. ISSN 1119-8362.{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)
  16. ^ M. Farahnak Ghazani, K. Najibzadeh and M. A. Ghahremani (2004). "ESTIMATION OF VEGETATION COVER BY USING LANDSAT ETM+ DATA" (PDF). The Joint Agriculture and Natural Resources Symposium, Tabriz – Ganja, May 14-16.
  17. ^ Qiming Zhou (1995). "The Integration of GIS and Remote Sensing for Environmental and Land Resource Management" (PDF). Proceedings of GIS AM/FM ASIA’95 Conference: C-2-1-C-2-9.
  18. ^ Qiming Zhou (1994). "Use of Remote Sensing and GIS for Environmentally Sound Regional Economic Planning" (PDF). 1994 Institute of Australian Geographers Conference.
  19. ^ Farshad, A. (1994). "Spectral image analysis in soil micromorphology with ILWIS". ITC JOURNAL (2). ITC: 168. ISSN 0303-2434.
  20. ^ J. O., P. Kisoyan and M. C. Chemelil1 (2005). "Estimation of Potential Soil Erosion for River Perkerra Catchment in Kenya". Water Resources Management. 19 (2). Springer Netherlands: 133–143. doi:10.1007/s11269-005-2706-5. ISSN 0920-4741.{{cite journal}}: CS1 maint: numeric names: authors list (link)
  21. ^ Renschler, C.; Diekkrueger, B.; Mannaerts, C. (1999). "Regionalization in surface runoff and soil erosion risk evaluation" (254). IAHS Publication (International Association of Hydrological Sciences): 233–241. {{cite journal}}: Cite journal requires |journal= (help)CS1 maint: multiple names: authors list (link)
  22. ^ Kandirmaz, H. M. Yegingil, L. Pestemalci, V. Emrahoglu, N. (2004). "Daily global solar radiation mapping of Turkey using Meteosat satellite data". INTERNATIONAL JOURNAL OF REMOTE SENSING. 25 (II). Taylor & Francis: 2159–2168. ISSN 0143-1161.{{cite journal}}: CS1 maint: multiple names: authors list (link)
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