BS ISO 19028:2016 pdf download

BS ISO 19028:2016 pdf download.Accessible design — Information contents, figuration and display methods of tactile guide maps
4.2 Principles for information contents
4.2.1 Tactile guide map shall be confined to the minimum information required to grasp the locality and/or path of travel. The amount of information given in a tactile guide map will largely be determined by the purpose of the tactile map. The information given differs whether the map is for indicating a route of travel or to give an overview of an area. All information that does not serve the intended purpose of the tactile guide map shall be omitted. EXAMPLE The information of the number of steps in each stairway is often given in the “orientation and mobility maps”, which are specialized for training of the persons with seeing impairment and blindness, while in the common tactile maps, such information is usually omitted.
4.2.2 When selecting information to be displayed on the map, the contents which support safe and smooth movements of persons with seeing impairment and blindness shall be prioritized.
4.2.3 Tactile readability shall be considered of prior consideration. The tactile readability of tactile information in guide maps is influenced by a variety of factors, which shall be considered in their mutual interdependence, which, in turn, will widely influence the selection, size and shape of tactile figures and marks. When a visual guide map displaying the identical range to a tactile guide map is available, the maps shall maintain mutual consistency, though the amount of information may be different.
4.2.4 All types of tactile marks (whether tactile figures or lettering) contained in a tactile guide map shall be easily identifiable and be explained in the legend or by lettering in the respective area of the map.
4.2.5 Pictograms commonly used for sighted people in technical drawings or in wayfinding signage shall be avoided because they are too complicated and finely structured to be read by finger touch.
4.2.6 Printed characters may be also used along with tactile figures on a tactile guide map.
4.2.7 Instead of lettering points of installed
5.2 Location of installed tactile guide maps
For a tactile guide map installed on the wall, which is perpendicular to the floor, the centre line height should be preferably 1 400 mm from the floor level. These dimensions do not apply to guide maps which are set horizontally to the floor or inclined to angles close to horizontal installation (see Figure 1). In either case, a location that does not hinder tactile readability shall be chosen. The clearance of the lowest part of the desk installation shall be 900 mm to enable wheelchair users to access. See ISO 21542:2011, 40.14. Great care shall be taken to ensure that people with seeing impairment and blindness can find the installed tactile guide maps, e.g. by using tactile walking surface indicator (TWSIs) or similarly appropriate tactile guidance and/or audio guidance to lead them there or by installing floor plans at fixed places next to elevators, stairs, etc.