GeoTweeters – ArcGIS Silverlight Client

geotwThis application was demonstrated as part of the GIS and Web 2.0 Application Development Demo Theater for the ESRI UC 2009.

The sample illustrates how to:

1. Integrate the ArcGIS Silverlight API with Twitter
2. Geocode your friends with Bing asynchronously
3. Use control templates and animation in XAML
4. Construct point and line graphics
5. Consume WCF services

1. Bing maps developer account ID and password
2. Twitter account
3. ArcGIS API for Microsoft Silverlight
4. Visual Studio 2008 SP1
5. Silverlight ver 2.0 or 3.0

View ReadMe.doc for instructions.

Open Source
To contribute or extend this application, please visit the project hosted on Codeplex.

Research Positions Open for Work on Bio-Resource Ecology and Climate Change in the Sikkim, Himalayas

ncsbSeveral long-term research positions are available as part of a Department of Biotechnology (DBT), Government of India, funded project on “Technological Innovations and Ecological Research for the Sustainable Use of Bioresources in Sikkim”. The project is jointly implemented by the National Centre for Biological Sciences (NCBS) (Tata Institute for Fundamental Research,, Bangalore, and the Ashoka Trust for Research in Ecology and the Environment (ATREE) (, Bangalore.

We seek qualified, highly motivated candidates for various research and technical positions at the Junior Research Fellow (JRF), Senior Research Fellow (SRF), Post-Doctoral Fellow levels, and in GIS/Remote Sensing.  The research positions can potentially lead to a PhD based at the two institutions. All salaries will be in accordance with DBT specified norms.

The areas of research encompass both basic and applied ecology and include the mapping and monitoring of faunal and floral biodiversity, field and laboratory measurements of biodiversity and ecosystem services (carbon, hydrology, pollination, bio-resources) and their response to climate change, and work on sustainable use of bio-resources by local communities.  Investigators on the project include Dr. Robert John (forest ecology), Dr. Jagdish Krishnaswamy (hydrology & landscape ecology), Dr. Soubadra Devy (pollination ecology) and Mr. Suman Rai (bioresource management) from ATREE, and Dr. Mahesh Sankaran (community ecology), Dr. Ajith Kumar (small-mammal ecology), Dr. Suhel Quader (behavioural and population ecology) and Dr. Uma Ramakrishnan (conservation genetics) from NCBS.

Candidates with backgrounds in life sciences, botany, zoology, geo-sciences, ecology, environmental science, social sciences and remote sensing/GIS and with demonstrated field experience and interest in working in Sikkim and the Northeastern India will be considered.  Depending on the position, laboratory work in Bangalore will be combined with field measurements and observations in Sikkim.  The GIS/RS position will be based in Bangalore. Short-listed candidates will be interviewed by project Scientists in Bangalore or Sikkim.

Interested candidates should send their CV and statement of interest by email to:  Applications will be reviewed until suitable candidates are found.
With regards,
Dr. A. Kumaraguru,
Project Post-Doctoral Fellow, Dr. Shivaji Group, Uppal Road, CCMB – LaCONES, Hydrabad.

Award Winning Book by Hanan Samet Details Spatial Data Indexing Processes

51d445r9t6l-_sl500_aa240_In his latest book, Foundations of Multidimensional and Metric Data Structures, Hanan Samet, renowned authority on this topic, presents a comprehensive view of spatial data structures and indexing that includes some of his own major algorithms, as well as those of other computer scientists. He is considered an expert on the use of hierarchical data structures such as the quadtree, which is often used to partition a two-dimensional space by recursively subdividing it into four quadrants, thereby providing a means to index the data that they span.

The book is the result of Samet’s longtime research at the University of Maryland’s Computer Vision Laboratory investigating the applicability of his work to geographic information systems, computer graphics, image processing, image databases, and visualization.  The book also addresses algorithmic issues arising in applications such as the display of point cloud data, finding nearest neighbors in spatial networks, and similarity searching for use in image databases..  It was an award winner in the 2006 best book in Computer and Information Science competition from the Professional and Scholarly Publishers Group of the American Publishers Association.

Comments Samet, “When multidimensional data corresponds to locational data, we have the additional property that all of the attributes usually have the same unit (possibly with the aid of scaling transformations), which is distance in space.  We can therefore combine the distance-denominated attributes and pose queries that involve proximity.”

In the Foreword to the book Jim Gray at Microsoft Research writes, “This book organizes the bewildering array of spatial and multidimensional indexing methods into a coherent field. Hanan Samet is the dean of ‘spatial data indexing.’ His two previous books have been the essential reference works for over a decade. This book unifies those previous books, and places

the field in the broader context of indexing and searching for information in any metric space.”

Xuejun Hao, Associate Research Scientist at Columbia University, writes “The most complete book on the subject to date.  In addition, to the huge amount of information covered, it also contains a thorough bibliography with over 2000 entries. The author uses an algorithmic approach with plenty of pseudo-code without resorting to complicated mathematical formulae….The book is easily accessible to a wide range of readers who need not be programmers or computer scientists.”

At the Computer Vision Laboratory Samet leads a number of research projects on the use of hierarchical data structures in GIS.  His research on the integration of spatial and nonspatial data into a DBMS has resulted in the development of two systems by his research group: QUILT, a GIS based on spatial data structures such as quadtrees and octrees, and SAND (Spatial And Non-spatial Data), which integrates spatial and non-spatial data and enables browsing through a spatial database using a graphical user interface.

He has also been developing the STEWARD (Spatio-Textual Extraction on the Web Aiding the Retrieval of Documents) system, a spatio-textual document search engine that enables the retrieval of documents on the basis of spatial proximity as well as matching keywords, and which has been used for documents of the research division of the Department of Housing and Urban Development.

Foundations of Multidimensional and Metric Data Structures: The Morgan Kaufmann Series in Computer Graphics is published by Morgan Kaufmann, ISBN-13: 978-0123694461, 2006, 1024 pages, and is available from Elsevier for $64.95.

GIS/Geospatial Industry Worldwide Growth Slows to 1% in 2009

daratechIndustry CEO Sentiment Strongly Upbeat for 2010 and Beyond

GIS/Geospatial industry worldwide growth is forecast to slow to 1%, down from 11% in 2008 and a whopping 17.4% in 2007 according to a just released study by Daratech, Inc., a Cambridge, Massachusetts market research firm. However, industry CEOs interviewed by Daratech were unanimous in their belief that growth consistent with the robust 11% cagr of the past six years would return in 2010.

North America has not been as adversely affected by the downturn as the rest of the world due to the on-going needs of homeland security and continuing investment in GIS, by the public sector. Growth in North America is forecast by Daratech to top 2.1%, more than twice the growth in Asia Pacific and five times the growth in Europe where investment in GIS/Geospatial technology has been hurt more severely by the current downturn as many European governments have cut back their geospatial technology purchases in anticipation of lower tax collections.

Perhaps the most dramatic slowdown in 2009 was in the private sector, which is forecast to shrink to $1.4 billion, down 0.7% from 2008. This downturn echoes the general pull back of the private sector from major additional investments in new IT technologies. At the same time public sector sales are expected to grow 4.1% to almost $957 million in 2009 reflecting this sectors continuing deployment of GIS technologies to all the services it offers.

In the Traditional GIS segment ESRI continues to have a dominant 30% market share, up from 29% in 2008 according to Daratech. Lead by its iconic president Jack Dangermond, ESRI has been a benchmark for new GIS technologies, philosophies and direction for the entire industry for more than 20 years, and indications are that it will continue to be so, says Daratech. Intergraph, the second largest player in the traditional segment is forecast by Daratech to have a 16% market share in 2009, up from 15% in 2008. Intergraph is remaking its entire business around a GIS philosophy, and as a GIS service provider Intergraph is likely to become even stronger in the years ahead. Third ranked is GE Energy, which is the market leader in the utilities market where it is forecast to have a 24% market share.

In the larger GIS/Geospatial market that includes data, geo-enabled engineering, GPS, photogrammetry and remote sensing MDA has a leading 21.8% share of the market. MDA’s strength is geospatial and engineering services for imaging, GIS, geology, weather and defense. The company’s sales are mostly to the homeland security and defense markets. ESRI, is second with a 15.7% share and Bentley Systems, the leading supplier of GIS/Geospatial AEC market software and services (where it has a 42.1% market share) is third. Bentley has frequently made the running in the geo-enabled engineering applications market and continues to demonstrate strong leadership in this area. However, Bentley can expect stronger competition from Autodesk, Intergraph and ESRI in the coming years, as this segment of the market may show greater than average growth, says Daratech.

Just released, Daratech’s study GIS/Geospatial Markets & Opportunities includes more than 1500 charts that cover both the private and public market segments for the years 2004 through 2009. It is available for purchase on Daratech’s web site.

[source: Daratech press release]

Research Analyst – Spatial Analysis Position, University of Canterbury

cantThe GeoHealth Laboratory, Department of Geography, University of Canterbury invites applications for a (). This is a three-year fixed term position based in the Health and Disability Intelligence (“HDI”) Unit (part of the Ministry of Health) in Wellington and is available immediately.

The GeoHealth Laboratory is a joint venture between the University of Canterbury (UC) and the New Zealand Ministry of Health. A number of academic staff, postdoctoral researchers, research fellows and postgraduate students who are based in or affiliated with the GeoHealth Laboratory help in providing a supportive research environment. The GeoHealth Laboratory staff are committed to undertaking policy-relevant health research and have a strong track record of publication in high quality peer reviewed journals, as well as regular contributions to various policy documents and media pieces. For further information about the lab see

The successful applicant will have training and research experience in health and , , social epidemiology and/or related discipline. Combined with strong GIS skills and good quantitative and analytical skills developed through their graduate career including at least 1-2 year relevant GIS work experience.. The appointee will be expected to perform a variety of tasks including: undertaking key GIS and spatial data analyses; providing a level of GIS and research support to staff at the HDI Unit; contributing to various health-related research projects; and contributing to the writing and dissemination of research outputs through peer reviewed publications, conferences and workshops.

Closing Date: 2 September 2009

Location: Wellington

Best Science Visualization Videos of 2009: Seasonal CO2 Buildup and Reduction in North America

…from Wired Science

“Some of the most impressive images in science are produced when researchers take numerical data and represent it visually through modeling and computer graphics. The Department of Energy honored 10 of this year’s best scientific visualizations with its annual SciDAC Vis Night awards, at the Scientific Discovery through Advanced Computing conference (SciDAC) in June. Researchers submitted visualizations to the contest, and program participants voted on the best of the best. From earthquakes to jet flames, this gallery of videos and images show how beautiful (and descriptive) visual data can be.


“Here we see how levels of carbon dioxide build up in North America during the winter months and then drop during the summer. Plants convert carbon dioxide into organic compounds using the energy from sunlight, so changes in the amount of sunlight create seasonal differences in carbon dioxide levels. Data for this video was collected by NASA’s Goddard Earth Observing System Model, Version 5 (GEOS-5), which is a system of models designed to collect earth science data for climate and weather prediction.

“Image: DOE SciDAC Program/Jamison Daniel and David Erickson”

Students Study Glacier Sciences on Alaskan Icefield

ccw…from Capital City Weekly

“Most Alaskans spend their summers soaking up as much of the seasonal warmth as possible, but since 1946 crews of icefield researchers have been doing just the opposite. The Juneau Icefield Research Project (JIRP), begun under the direction of Dr. Maynard Miller, has given students from all over the world the opportunity to study glacier sciences in nature’s classroom while trekking across the pristine landscape of the Juneau Icefield. Today, JIRP continues to train many of the world’s leading glacier researchers.

“Once a partnership is established, JIRP will undergo a process of elevating the its level of technology, including digitizing data records, developing geospatial information files to share with the worldwide science community, upgrading weather stations and accessing satellite imagery.”