Geo-Tunis 2010: The Use of GIS and Remote Sensing for Sustainable Development

The Fifth Session of the International Conference Geotunis 2010

29 November to 03 December 2010

Activating the recommendations emanating from the Fourth Session of the International Conference Geo-Tunis 2009, the Tunisian Association of Digital Geographic Information organises in cooperation with several scientific institutions and companies in GIS and remote sensing:  The fifth session of the International Conference Geo-Tunis 2010, the use of GIS and remote sensing in achieving sustainable development from 29 November to 03 December 2010.

  • For the scientific underpinnings of the Conference, please visit the following
  • For presenting a working paper, please visit the following link: Registration
  • For participating at the Geotechnologic Fair, please visit the following link Registration
  • For further readings, please visit our
    You can also contact us at:
    E-mail address:
    – General Secretariat
    – Scientific Committee: Dr. Lutfi Al-Momani: Jordan
    Phone: 00 216 71 256 068 / 00216 71 255 926
    Fax 00 216 71 255 881

And participation is open to all those who are involved in GIS and remote sensing and the related sciences. So do not delay your registrations and participations at the most important international gathering dealing with GIS and remote sensing’s uses and applications. Your participation will support scientific and technical exchanges amongst experts, scientists and specialists. Your contribution will also be a distinguished leap for the technologies of digital geography’s uses and various applications

A Cell-based Algorithm for Evaluating Directional Distances in GIS

International Journal of Geographical Information Science, Volume 24, Issue 4 April 2010 , pages 577 – 590

S. Yang; J. H. Yong; J. G. Sun; H. J. Gu; J. C. Paul

“Directional distance is commonly used in geographical information systems as a measure of openness. In previous works, the sweep line method and the interval tree method have been employed to evaluate the directional distances on vector maps. Both methods require rotating original maps and study points in every direction of interest. In this article, we propose a cell-based algorithm that pre-processes a map only once; that is, it subdivides the map into a group of uniform-sized cells and records each borderline of the map into the cells traversed by its corresponding line segment. Based on the pre-processing result, the neighbouring borderlines of a study point can be directly obtained through the neighbouring cells of the point, and the borderlines in a definite direction can be simply acquired through the cells traversed by the half line as well. As a result, the processing step does not need to enumerate all the borderlines of the map when determining whether a point is on a borderline or finding the nearest intersection between a half line and the borderlines. Furthermore, we implement the algorithm for determining fetch length in coastal environment. Once the pre-processing is done, the algorithm can work in a complex archipelago environment such as to calculate the fetch lengths in multiple directions, to determine the inclusion property of a point, and to deal with the singularity of a study point on a borderline.”

River Channel Migration: A Remote Sensing and GIS Analysis

Paper accepted for presentation at the 2010 European Space Agency Living Planet Symposium, Bergen, Norway, 28 June to 2 July 2010:

Islam, Md. Tariqul

“Remote sensing and geographic information system provide tools for quantitative and qualitative river morphological analysis. Bangladesh is a riverine, flood prone country and, the Padma and the Jamuna are two of major three rivers in the country. The aim of this research is to monitor the channel migration of the Padma and the Jamuna rivers since 1977 to 2004 using remote sensing and GIS. The Landsat images were processed using PCI Geomatica and ArcGIS 9.3 was used for GIS analysis. The Landsat images were visualized and identified nine locations to investigate the channel migration. The images were classified into two broad categories, i.e. water and non-water body. ArcGIS 9.3 was used to transfer these classified images into GIS layers. A standard measurement tool of ArcGIS was applied to measure the movement of river channel based on initial river channel in 1977. General trend of the Padma and the Jamuna River channel migration at locations A, B, C, D, F, G, H and I towards north, northeast and southwest eventually, north, northeast, east, east, west and west respectively. The confluence point of the Padma and Jamuna (at location E) migrated toward southeast with high rate. During 1977-2004, it migrated about 9000m toward southeast. Trend of migration of the confluence point was faster than any other locations in the channel of the Padma River.”

GSDI 12 Abstract Deadline Extended to April 15

Due to an inordinate number of requests from the Asia-Pacific region for an extension to the abstract and paper submission deadline for GSDI 12, we have decided to extend the abstract deadline for two weeks. The previous deadlines of April 1 have now been altered to April 15. The new deadline applies to submissions from anywhere in the world.

GSDI 12 World Conference
19-22 October 2010

Theme: Realizing Spatially Enabled Societies

GSDI 12 invites presentations covering the full range of practice, development and research experiences that advance the spatial enablement of society and the practice and theory of spatial data infrastructure development.

The Call for Papers may be found at

Due to numerous requests, we are extending the deadline for full papers to be considered for the book. The deadlines for the refereed outlets are now as follows:


Abstract Deadline for All Submissions: 15 April 2010

Full Paper Deadline (if author wants submission considered for a refereed chapter in the Conference Book or refereed paper in the Proceedings): 15 April 2010

Full Paper Deadline (if author wants submission considered for inclusion in the Refereed IJSDIR Special Issue or in the non-refereed portion of the proceedings): 1 July 2010


GSDI 12 will support three primary forms of publication:

  1. a normal conference proceedings with abstracts and full articles (non-refereed and refereed), published on a CD,
  2. a pre-conference published book of fully refereed articles, and
  3. a post-conference special edition of the International Journal of Spatial Data Infrastructures Research (IJSDIR) with full articles selected from the proceedings and then fully refereed and revised after the conference.

More information

Spatial Assessment of Groundwater Demand in Northwest Bangladesh

International Journal of Water, 2010 – Vol. 5, No.3 pp. 267 – 283

Shamsuddin Shahid

“Spatial assessment of groundwater demand has been carried out as a part of sustainable water resources management in Northwest Bangladesh. ASTER images are synthesised for extracting the extent of irrigated land. The Penman–Monteith method is used for the calculation of reference evapotranspiration from climate data. Soil information is used for the estimation of water requirement for land preparation and seepage loss. The domestic water demand is calculated from population census data. The study shows that the irrigation water demand in the study area varies between 839 mm and 1212 mm, which amounts to about 96.5% of total groundwater demand.”

Efficient Range Queries in Spatial Databases over Peer-to-Peer Networks

International Journal of Internet Protocol Technology, 2009 – Vol. 4, No.2 pp. 79 – 90

Ibrahim Kamel, Zaher Al Aghbari, and Ahmed Mustafa

“Peer-to-Peer (P2P) network, e.g., Chord, is designed mainly for one-dimensional data retrieval and point queries. Multimedia and spatial applications require efficient execution of range queries. This paper proposes an efficient scheme to support range query over Chord while balancing the storage load. The paper proposes a rotating token scheme that places the joining nodes in appropriate locations to share loads with overloaded nodes. To support range queries, we utilise an order-preserving mapping function to map keys to nodes in an order preserving manner. Simulation experiments show significant gain in storage load balancing and the performance of range queries over Chord.”