Development and expansion of the natural resource data and information systems in support of the Illinois Comprehensive Wildlife Conservation Plan : annual segment report 2005 /

Submitted to Illinois Department of Natural Resources.

Development and expansion of the natural resource data and information systems in support of the Illinois Comprehensive Wildlife Conservation Plan : final project completion report 2006, project 5-02-P-001, 1 February 2003 to 30 September 2006 /

Submitted to Illinois Department of Natural Resources.

Management information systems manual.

Cover title.

Report of the Data Information Systems Commission, State of Illinois.

Mode of access: Internet.

Using a geographic information system to optimize site selection for the ssc in Illinois /

"April 1987"--cover.

Geographic information system : a computer assisted approach to managing forest pest area.

"October 1983"--P. [1]

Turning administrative systems into information systems.

"Selected papers given in ... and ... at the Annual Meetings of the American Statistical Association and other related conferences"--(varies).

Information systems : agencies overlook security controls during development : report to the Chairman, Committee on Science, Space, and Technology, House of Representatives /

"B-229223"--p. [1]

Hearing to review the U.S. Department of Agriculture's release of program beneficiaries' social security numbers and the department's information systems, generally : hearing before the Committee on Agriculture, House of Representatives, One Hundred Tenth Congress, first session, May 2, 2007.

Shipping list no.: 2009-0305-P.

Privacy--the collection, use, and computerization of personal data : joint hearings before the Ad Hoc Subcommittee on Privacy and Information Systems of the Committee on Government Operations and the Subcommittee on Constitutional Rights of the Committee on the Judiciary, United States Senate, Ninety-third Congress, second session ... June 18, 19, and 20, 1974

Hearings held on S. 3418, 3633, 3116, 2810, and 2542.

Information systems studies : [materials information systems for Federal policy making, report] /

Mode of access: Internet.

Nonconventional Technical Information Systems in Current Use; Report

Mode of access: Internet.

Computer-based national information systems : technology and public policy issues, summary.

"OTA-CIT-147"--P. 4 of cover.

Dynamic multi-resolution spatial object derivation for mobile and WWW applications

Online geographic information systems provide the means to extract a subset of desired spatial information from a larger remote repository. Data retrieved representing real-world geographic phenomena are then manipulated to suit the specific needs of an end-user. Often this extraction requires the derivation of representations of objects specific to a particular resolution or scale from a single original stored version. Currently standard spatial data handling techniques cannot support the multi-resolution representation of such features in a database. In this paper a methodology to store and retrieve versions of spatial objects at, different resolutions with respect to scale using standard database primitives and SQL is presented. The technique involves heavy fragmentation of spatial features that allows dynamic simplification into scale-specific object representations customised to the display resolution of the end-user's device. Experimental results comparing the new approach to traditional R-Tree indexing and external object simplification reveal the former performs notably better for mobile and WWW applications where client-side resources are limited and retrieved data loads are kept relatively small.