Accessibility Statement
EDINA has a policy of working towards maximum accessibility for all
users to all services that we provide. Where possible features are
included that are specifically intended to enhance accessibility. EDINA
policy includes making accurate accessibility statements, which
describe shortcomings as well as positive features.
This accessibility statement describes the agcensus service. The service is hosted by EDINA.
In the event that you discover any part of agcensus that does not match this statement, please email edina@ed.ac.uk.
Contents:
agcensus service
Compliance with appropriate standards
Use of Images
Use of Tables
Opening new browser windows
Navigation
Labelling and mark up of HTML forms and links
Session Control
Special features for non-graphical browsers
agcensus Service
The agcensus Service provides access to spatially formatted agricultural census data and is hosted at EDINA.
Compliance with appropriate standards
The HTML generated has not been tested for formal validation, but it is believed
to perform well in a wide range of browsers.
Compliance of Javascript with W3C recommendations is not known, but it is believed
to perform well in a wide range of browsers.
The area selection tool in 'drag select' mode (Extent Selection -
Stage 5) requires
Javascript, however an area can be selected without the use of
Javascript by panning
and zooming into the area while in the default 'pan' mode.
The window close link in the help section also requires Javascript,
however the window can be closed normally without the use of
Javascript.
Javascript is used in the validation of forms, in order to get instant feedback,
however if Javascript is not enabled and an invalid form is submitted then the page
is reloaded and an appropriate message is displayed.
Use of images
Where an image is used to display text, matching alt text is
provided
Users of visual browsers should note that in several places, images are
used instead of link text. These will not resize if you change the text
display size (font size) in your browser. Some browsers may display the
alt as a "tool tip" (a small box containing the text that appears when
you position the cursor over an image); otherwise, if you experience
difficulty reading the image, most browsers will be forced to display
the alt text if you disable image loading.
Where images are used for form controls ("buttons"), alt text
equivalent to the button label is included.
Images used for form controls are all large enough to be easy to click
on using a mouse or other pointing device.
It should be noted that for map images or images displaying
distribution of data, an equivalent text description cannot be provided
as these are dynamically created depending on the area and item
selected. They will always read 'Land Use Map. Click to Pan',
'Navigation Map. Click to Pan' or 'Visualisation of Agricultural Data'
as appropriate.
Use of tables
Data tables do not have summary attributes; tables used for layout may not have blank summary attributes.
Captions may be used for some tables.
Opening new browser windows
Online help opens a new browser window. No warning is provided before or after the new window is opened.
Navigation
The title of each web page (from the HTML header) is specific to
each page within the user interface.
All pages include a title at the top describing the function of the
page and/or the current stage in the download / mapping process.
All pages include a links to the previous stages, home, help, faq and
contact information.
Labelling and mark up of HTML forms and links
Link text or alt text for image links is used to convey the function
of links; title attributes are not used for links or form controls.
Labels are not used.
Session control
Whenever a user accesses the service a "session" is initiated. The
session is used to support the functions of the user interface. Cookies
(storage of data on your computer via your browser) are not used.
Sessions will time out after 30 minutes of non-activity. If you
click on anything is the user interface after this time, you will see a
page with message indicating that your session timed out.
You must log in again following a time out. If you have an Athens
personal account (for your use only) you will be offered the
opportunity to restart a timed out session. This feature is not
available to users with Athens access accounts (shared between multiple
users). Non Athens can log in again with their username and password.
Special features for non-graphical browsers
There are no features provided specifically for non-graphical
browsers, such as hidden (non-visual) links or links that skip to main
content. Access keys are not implemented.
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