SHELDUS is constantly updated and improved. Below are files in .pdf format that document running changes to a version.
About SHELDUS v5.1 (launched 2/2007):
New data were added ranging from June 1, 2005 through December 31, 2005. Additionally, the entire year of 1990 was revised due to data errors. Version 5.1is the first version to include information on presidential disaster declarations, GLIDE numbers and event-specific loss information on selected major events.
Running changes are documented here.
About SHELDUS v4.1 (launched 02/2006):
New data were added ranging from August 1, 2004 through May 31, 2005.
Running changes are documented here.
About SHELDUS v3.1 (launched 03/2005):
New data were added ranging from January 1, 2001 through July 31, 2004.
Running changes are documented here.
About SHELDUS v2.1 (launched 10/2004):
The tornado dataset from 1960 through 1993 and 1995 was revised. Version 2.0 contained incorrect damage figures for those years meaning property damages were overestimated tenfold whereas crop damages were underestimated. This new and updated version matches tornado information put forth by NCDC.
About SHELDUS (general):
For events that occurred between 1960 and 1995, a loss threshold of $50,000 or higher in either property or crop losses was applied. This threshold equals NCDC's logarithmic category 5 = $50,000 to $500,000). From 1995 onwards, SHELDUS includes all property or crop damage-causing events reported in NCDC's Storm Data publications.
This change in methodology was necessary, since the main source of raw data - the National Climate Date Center (NCDC) - changed its reporting procedures in 1995. During this year both categorical as well as exact dollar losses were reported by NCDC. Thus, the majority of records from 1995 onwards are exact damage figures that have been reported as such by NCDC and that have not undergone any post-processing by SHELDUS (exemption loss distribution of events affecting multiple counties).
Additionally, NCDC also improved its spatial reporting system. Instead of reporting affected regions and distributing losses across the affected counties, NCDC moved to reporting losses on a county basis. Thus from 1995-2000, SHELDUS includes EVERY event that caused property or crop damages as reported by NCDC. Consequently, the database contains many small damage figures like $500, $1000, etc. since 1995.
Running changes are documented here.
2. Selected Major Events in SHELDUS
For selected hazard events accumulated losses are available (since SHELDUS v5.1). It is important to note that loss totals are based on SHELDUS records. As a result, loss totals are often under-reported (e.g. Hurricane Katrina) due to lack of information in the data sources from which SHELDUS data are compiled.
Detailed information on event and SHELDUS record selection are documented here.
3. Download of FIPS code/county name information
The Federal Information Processing Standard (FIPS) provides the names and codes that represent the counties and equivalent areas (census areas, boroughs, etc.) as statistical subdivisions of the 50 States and the District of Columbia. The last three digits of the FIPS code refer to the county whereas the preceding one or two digits identify the state.
Changes of FIPS codes are published by the National Institute of Standards and Technology (NIST) after approval by the Secretary of Commerce. Questions concerning the list of entities and their assigned codes are to be addressed to the Maintenance Agency: Office of the Chief, Geography Division, Bureau of the Census, Washington, DC 20233.
Please note that for ease of use, FIPS code changes are updated decadal, i.e. county changes are only represented in the following decade. For instance, the creation of Bloomfield County, CO in 2002 is not yet reflected in SHELDUS and will only become available in 2010. Thus, to query for Bloomfield County, the user is asked to query the database for Adams, Boulder, Jefferson, and Weld counties.
Overview of FIPS code changes from 1960-2000 (.xls)
Quick access to FIPS codes and corresponding county names can be downloaded as shapefiles from the MAPS website.
6. Entity and Attribute Information
7. Metadata Reference Information
The metadata was generated using ArcCatalog 9.1. The downloadable metadata files can be imported into ArcCatalog. The file information does not differ from the above information.
Please download important metadata information in .txt or .xml format.