Section 508 and Accessibility on

Thank you for visiting the National Integrated Drought Information System (NIDIS) Drought Portal. NIDIS is committed, and is making every possible effort, to ensure that all electronic information and technologies developed, procured, maintained, or used by NIDIS are accessible to all users, including those with disabilities.

Section 508 Compliance

Section 508 of the Americans with Disabilities Act (ADA) requires Federal agencies to make their electronic and information technology accessible to people with disabilities. Inaccessible technology interferes with an individual's ability to obtain and use information quickly and easily. Section 508 was enacted to eliminate barriers in information technology, to make available new opportunities for people with disabilities, and to encourage development of technologies that will help achieve these goals. NIDIS is a network of federal, state, local, and tribal partners. As a federally managed partnership, NIDIS is committed to working with all of our non-federal partners to ensure that information resources they contribute to NIDIS comply with Section 508 guidelines.

While most resources developed by NIDIS are Section 508-compliant, certain dynamically generated resources are exempt from the requirement under the "Undue Burden Determination" (36 CFR 1194.2).

  • These dynamically generated products typically involve retrieval of data in various formats dependent on user requirements, resulting in a map or other graphic display. These visual representations contain large quantities of information not accessible to people visually impaired. This information may be presented on the Internet or Intranet Web pages, or in Web-based publications issued on compact disc or similar media.
  • Images produced by these products are dynamically generated, resulting in an output image that will vary depending on the selection criteria determined by the user. This makes it impossible to prepare in advance a long description or other text alternative for those images which would provide "substantially equivalent or greater access to and use of" information contained in these pages and products. There are no products yet available that could dynamically generate a text alternative containing information comparable to that found in the image. A text alternative for even a static map image cannot adequately convey the information that is visually perceived.
  • The nature of these types of products is visual - either a representation of geospatial data or database information plotted on a digital spatial coverage, such as a map. Currently there exists no alternate technology for generation of geospatial information in a format that allows access via assistive technology. Modification of these pages and products to comply with these standards would require a fundamental alteration to the nature of the product.
  • The standards applicable to Web pages and electronic publications are found in 1194.22, Web-based intranet and internet information and applications. Web pages and Web-based products and publications using dynamically generated geospatial database and digital information and web-based mapping applications are unable to meet standards in 1194.22(a), (c), (e), (f), (k), (l), (m).
  • As there exists no technology capable of producing dynamically generated geospatial images in an alternative manner accessible to individuals who are visually impaired, compliance with those standards is not possible at this time.

Unless covered by a separate determination, the Web pages and Web-based products can and will meet the remaining individual standards in 1194.22, as applicable.

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